# India groundwater quality by district, CGWB 2024-2025

Source: CGWB Annual Ground Water Quality Report 2024 (NHS 2023-24) + 2025 location annexures (Pre-Monsoon 2024). Limits: BIS IS 10500:2012. Extracted 2026-06-12.
Licence: CC BY 4.0, attribution to vsctimes.com. Page: https://vsctimes.com/water-quality-india/

## What the CGWB data shows

India's Central Ground Water Board flagged 644 of the 755 districts it monitored, 85.3%, for at least one contaminant above the BIS drinking-water limit across its 2024 and 2025 reports.
Nitrate is the most widespread problem, flagged in 526 districts, ahead of iron at 409 and fluoride at 301. The highest single readings recorded anywhere were nitrate at 2,296 mg/L in YSR Kadapa, Andhra Pradesh, against a limit of 45 mg/L, arsenic at 339.7 ppb in Nadia, West Bengal, against a limit of 10 ppb, and fluoride at 22 mg/L in Sirsa and Jind, Haryana, against a limit of 1.5 mg/L.
Every monitored district was flagged in: Uttar Pradesh (75), Tamil Nadu (38), Telangana (33), Karnataka (31), Andhra Pradesh (26), Haryana (22), Punjab (22) and Kerala (14).
The 2025 release added manganese, lead and zinc. Lead is flagged in 28 districts.

## Methodology

- Thresholds: A flag means CGWB lists at least one monitored location in the district at or above that threshold. CGWB's annexures list sites at or above a limit, so a small number of readings sit exactly on the limit rather than above it; these are carried as listed. These are the report's own thresholds; for fluoride and iron they are the BIS permissible/relaxed limits, not the stricter acceptable limits.
- Measured ranges: Location-level measured ranges from CGWB 2024 Annexures I-VII (only threshold-exceeding sites are listed, so ranges reflect affected sites). TDS estimated as 0.64xEC.
- Estimated TDS is derived from electrical conductivity as EC x 0.64.
- Known source discrepancy: Iron Table 20: Uttar Pradesh row states 69 districts but lists 64 names; verified against rendered page 80. We carry the 64 listed names.
- Deduplication: 61 duplicate spellings merged into 755 canonical districts.
- A district is flagged if either year exceeded a limit. Verdicts use the worse of the two years.
- Absence from the list is not a clean certificate: CGWB annexures list only sites that exceeded a limit.

## Reading the two data files together

The CSV and the JSON hold the same underlying readings but present them differently, so do not join them on value.

- CSV (india-groundwater-2024-2025.csv): each contaminant's min, max and site count are the year with the worse reading, and the accompanying `<contaminant>_year` column states which year that is. Read the value and its year column together.
- JSON (districts.json): the top-level `measured` block holds the most recent reading, tagged with `year`. Where the other year was worse, the same block carries `worse_year` and `worse_max`. Full per-year detail is under `years.2024` and `years.2025`.
- The page and the CSV both show the worse year, which is the safety-first convention. The JSON leads with the freshest figure and keeps the worse one alongside.
- 463 of 1,713 measured cells differ between the two files for this reason alone. In every one of those cases the CSV's year column correctly identifies the year it is quoting.

## Contaminant thresholds

- Salinity (EC): BIS limit 3,000 µS/cm, flagged in 241 districts
- Fluoride: BIS limit 1.5 mg/L, flagged in 301 districts
- Nitrate: BIS limit 45 mg/L, flagged in 526 districts
- Iron: BIS limit 1.0 mg/L, flagged in 409 districts
- Arsenic: BIS limit 10 ppb, flagged in 140 districts
- Uranium: BIS limit 30 ppb, flagged in 151 districts
- Manganese: BIS limit 0.3 mg/L, flagged in 201 districts
- Lead: BIS limit 0.01 mg/L, flagged in 28 districts
- Zinc: BIS limit 15 mg/L, flagged in 6 districts

## Ten worst districts per contaminant

### Salinity (EC)
1. Kurnool, Andhra Pradesh: 84,660 µS/cm (CGWB 2024)
2. Mathura, Uttar Pradesh: 34,180 µS/cm (CGWB 2024)
3. Patan, Gujarat: 32,970 µS/cm (CGWB 2025)
4. Churu, Rajasthan: 27,200 µS/cm (CGWB 2024)
5. Porbandar, Gujarat: 25,880 µS/cm (CGWB 2024)
6. Pudukkottai, Tamil Nadu: 25,300 µS/cm (CGWB 2025)
7. Jodhpur, Rajasthan: 25,000 µS/cm (CGWB 2024)
8. Krishna, Andhra Pradesh: 24,100 µS/cm (CGWB 2024)
9. Jhajjar, Haryana: 23,412 µS/cm (CGWB 2024)
10. Surendranagar, Gujarat: 23,312 µS/cm (CGWB 2024)

### Fluoride
1. Jind, Haryana: 22 mg/L (CGWB 2024)
2. Sirsa, Haryana: 22 mg/L (CGWB 2024)
3. Ganganagar, Rajasthan: 18.2 mg/L (CGWB 2024)
4. Jodhpur, Rajasthan: 17.2 mg/L (CGWB 2024)
5. Churu, Rajasthan: 17.1 mg/L (CGWB 2024)
6. Bhiwani, Haryana: 16 mg/L (CGWB 2024)
7. Hanumangarh, Rajasthan: 15.6 mg/L (CGWB 2024)
8. Bikaner, Rajasthan: 15 mg/L (CGWB 2024)
9. Sri Muktsar Sahib, Punjab: 14 mg/L (CGWB 2024)
10. Gurugram, Haryana: 13 mg/L (CGWB 2024)

### Nitrate
1. YSR Kadapa, Andhra Pradesh: 2,296 mg/L (CGWB 2024)
2. Nagarkurnool, Telangana: 1,989 mg/L (CGWB 2024)
3. Chitradurga, Karnataka: 1,926 mg/L (CGWB 2024)
4. Churu, Rajasthan: 1,202 mg/L (CGWB 2025)
5. Kurnool, Andhra Pradesh: 1,141 mg/L (CGWB 2024)
6. Raichur, Karnataka: 1,010 mg/L (CGWB 2024)
7. North West, Delhi: 994 mg/L (CGWB 2024)
8. Dharwad, Karnataka: 953 mg/L (CGWB 2024)
9. Sri Muktsar Sahib, Punjab: 950 mg/L (CGWB 2024)
10. Bhilwara, Rajasthan: 891 mg/L (CGWB 2024)

### Iron
1. Sambalpur, Odisha: 65.92 mg/L (CGWB 2025)
2. Bankura, West Bengal: 53.7 mg/L (CGWB 2024)
3. Medak, Telangana: 49.86 mg/L (CGWB 2024)
4. Madurai, Tamil Nadu: 46.895 mg/L (CGWB 2025)
5. North 24 Parganas, West Bengal: 43.7 mg/L (CGWB 2024)
6. Bargarh, Odisha: 43.39 mg/L (CGWB 2024)
7. Dehradun, Uttarakhand: 43.33 mg/L (CGWB 2024)
8. Gajapati, Odisha: 40.98 mg/L (CGWB 2024)
9. Nuapada, Odisha: 40.91 mg/L (CGWB 2025)
10. Chitrakoot, Uttar Pradesh: 37.118 mg/L (CGWB 2025)

### Arsenic
1. Nadia, West Bengal: 339.7 ppb (CGWB 2025)
2. Murshidabad, West Bengal: 299.1 ppb (CGWB 2025)
3. South 24 Parganas, West Bengal: 292.6 ppb (CGWB 2025)
4. Buxar, Bihar: 288.94 ppb (CGWB 2024)
5. Bhojpur, Bihar: 260.99 ppb (CGWB 2024)
6. Khagaria, Bihar: 249.78 ppb (CGWB 2024)
7. Malda, West Bengal: 203.7 ppb (CGWB 2025)
8. North 24 Parganas, West Bengal: 162.2 ppb (CGWB 2025)
9. Ganjam, Odisha: 135.2 ppb (CGWB 2025)
10. Gonda, Uttar Pradesh: 130 ppb (CGWB 2024)

### Uranium
1. Jodhpur, Rajasthan: 1,035 ppb (CGWB 2024)
2. Tumkur, Karnataka: 643.2 ppb (CGWB 2024)
3. Tonk, Rajasthan: 600 ppb (CGWB 2024)
4. Churu, Rajasthan: 551 ppb (CGWB 2024)
5. Hanumangarh, Rajasthan: 494 ppb (CGWB 2024)
6. Chikkaballapura, Karnataka: 488.1 ppb (CGWB 2025)
7. Sonbhadra, Uttar Pradesh: 403.18 ppb (CGWB 2024)
8. Vijayanagara, Karnataka: 353.1 ppb (CGWB 2025)
9. Sangrur, Punjab: 306.6 ppb (CGWB 2024)
10. Bathinda, Punjab: 255.74 ppb (CGWB 2024)

### Manganese
1. Chitrakoot, Uttar Pradesh: 7.01 mg/L (CGWB 2025)
2. Jammu, Jammu & Kashmir: 6.978 mg/L (CGWB 2025)
3. Jajpur, Odisha: 6.628 mg/L (CGWB 2025)
4. Puri, Odisha: 5.849 mg/L (CGWB 2025)
5. Bhadrak, Odisha: 5.755 mg/L (CGWB 2025)
6. Sribhumi (Karimganj), Assam: 4.799 mg/L (CGWB 2025)
7. South Andaman, Andaman & Nicobar Islands: 4.393 mg/L (CGWB 2025)
8. Mandya, Karnataka: 3.767 mg/L (CGWB 2025)
9. Kamrup, Assam: 3.662 mg/L (CGWB 2025)
10. Tehri Garhwal, Uttarakhand: 3.354 mg/L (CGWB 2025)

### Lead
1. Raichur, Karnataka: 0.356 mg/L (CGWB 2025)
2. Dibrugarh, Assam: 0.307 mg/L (CGWB 2025)
3. Nuapada, Odisha: 0.132 mg/L (CGWB 2025)
4. Sagar, Madhya Pradesh: 0.108 mg/L (CGWB 2025)
5. Kokrajhar, Assam: 0.096 mg/L (CGWB 2025)
6. South West, Delhi: 0.065 mg/L (CGWB 2025)
7. Burhanpur, Madhya Pradesh: 0.057 mg/L (CGWB 2025)
8. North West, Delhi: 0.056 mg/L (CGWB 2025)
9. West, Delhi: 0.056 mg/L (CGWB 2025)
10. Barmer, Rajasthan: 0.055 mg/L (CGWB 2025)

### Zinc
1. Pudukkottai, Tamil Nadu: 58.622 mg/L (CGWB 2025)
2. Nuapada, Odisha: 27.653 mg/L (CGWB 2025)
3. Sambalpur, Odisha: 22.724 mg/L (CGWB 2025)
4. Pauri Garhwal, Uttarakhand: 17.063 mg/L (CGWB 2025)
5. North 24 Parganas, West Bengal: 16.121 mg/L (CGWB 2025)
6. Kalahandi, Odisha: 15.124 mg/L (CGWB 2025)

## All districts

- Nicobars, Andaman & Nicobar Islands: not listed in the 2024 or 2025 exceedance tables
- North and Middle Andaman, Andaman & Nicobar Islands: iron, manganese
- South Andaman, Andaman & Nicobar Islands: high salinity, fluoride, iron, manganese
- Alluri sita rama raju, Andhra Pradesh: fluoride, nitrate
- Anakapalli, Andhra Pradesh: high salinity, fluoride, nitrate
- Anantapur, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- Annamayya, Andhra Pradesh: high salinity, fluoride, nitrate
- Bapatla, Andhra Pradesh: high salinity, fluoride, nitrate
- Chittoor, Andhra Pradesh: high salinity, fluoride, nitrate, iron
- East Godavari, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- Eluru, Andhra Pradesh: high salinity, nitrate
- Guntur, Andhra Pradesh: high salinity, nitrate, iron, arsenic
- Kakinada, Andhra Pradesh: high salinity, nitrate
- Konaseema, Andhra Pradesh: high salinity, nitrate
- Krishna, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- Kurnool, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- Nandyal, Andhra Pradesh: fluoride, nitrate
- Nellore, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- NTR, Andhra Pradesh: high salinity, fluoride, nitrate
- Palnadu, Andhra Pradesh: high salinity, fluoride, nitrate
- Parvathipuram Manyam, Andhra Pradesh: high salinity, nitrate
- Prakasam, Andhra Pradesh: high salinity, fluoride, nitrate, iron, arsenic
- Sri Satya Sai, Andhra Pradesh: high salinity, fluoride, nitrate
- Srikakulam, Andhra Pradesh: high salinity, fluoride, nitrate, iron
- Tirupati, Andhra Pradesh: high salinity, fluoride, nitrate
- Visakhapatnam, Andhra Pradesh: high salinity, fluoride, nitrate
- Vizianagaram, Andhra Pradesh: high salinity, nitrate, iron
- West Godavari, Andhra Pradesh: high salinity, nitrate, iron
- YSR Kadapa, Andhra Pradesh: high salinity, fluoride, nitrate, iron
- Anjaw, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Changlang, Arunachal Pradesh: iron, manganese
- East Kameng, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- East Siang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Kamle, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Kra Daadi, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Kurung Kumey, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Lepa Rada, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Lohit, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Longding, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Lower Dibang Valley, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Lower Siang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Lower Subansiri, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Namsai, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Pakke Kessang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Papum Pare, Arunachal Pradesh: fluoride, iron, manganese
- Shi Yomi, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Siang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Tawang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Tirap, Arunachal Pradesh: iron
- Upper Dibang Valley, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Upper Siang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Upper Subansiri, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- West Kameng, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- West Siang, Arunachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Baksa, Assam: iron, manganese
- Barpeta, Assam: nitrate, iron, arsenic, manganese
- Biswanath, Assam: manganese
- Bongaigaon, Assam: iron
- Cachar, Assam: iron, arsenic, manganese, lead
- Charaideo, Assam: manganese
- Chirang, Assam: not listed in the 2024 or 2025 exceedance tables
- Darrang, Assam: nitrate, iron, manganese
- Dhemaji, Assam: iron, manganese
- Dhubri, Assam: not listed in the 2024 or 2025 exceedance tables
- Dibrugarh, Assam: iron, manganese, lead
- Dima Hasao, Assam: not listed in the 2024 or 2025 exceedance tables
- East Karbi Anglong, Assam: iron, manganese
- Goalpara, Assam: iron, arsenic, manganese, lead
- Golaghat, Assam: iron, arsenic, manganese
- Hailakandi, Assam: iron, manganese
- Hojai, Assam: iron, manganese
- Jorhat, Assam: iron, manganese
- Kamrup, Assam: fluoride, iron, arsenic, manganese, lead
- Kamrup Metropolitan, Assam: not listed in the 2024 or 2025 exceedance tables
- Karbi Anglong, Assam: iron, arsenic, manganese
- Kokrajhar, Assam: iron, lead
- Lakhimpur, Assam: iron, arsenic, manganese
- Majuli, Assam: not listed in the 2024 or 2025 exceedance tables
- Morigaon, Assam: high salinity, nitrate, iron, manganese
- Nagaon, Assam: iron, manganese
- Nalbari, Assam: iron, arsenic, manganese
- Sivasagar, Assam: iron, arsenic, manganese
- Sonitpur, Assam: iron, manganese
- South Salmara Mankachar, Assam: not listed in the 2024 or 2025 exceedance tables
- Sribhumi (Karimganj), Assam: iron, arsenic, manganese
- Tinsukia, Assam: nitrate, iron, manganese
- Udalguri, Assam: iron, manganese, lead
- West Karbi Anglong, Assam: iron, manganese
- Araria, Bihar: nitrate, iron, arsenic
- Arwal, Bihar: nitrate
- Aurangabad, Bihar: high salinity, nitrate
- Banka, Bihar: fluoride, iron
- Begusarai, Bihar: fluoride, nitrate, iron, arsenic
- Bhagalpur, Bihar: nitrate, iron, arsenic
- Bhojpur, Bihar: fluoride, nitrate, iron, arsenic
- Buxar, Bihar: high salinity, nitrate, iron, arsenic, manganese
- Darbhanga, Bihar: arsenic
- East Champaran, Bihar: fluoride, nitrate, iron, arsenic
- Gaya, Bihar: fluoride, nitrate, iron
- Gopalganj, Bihar: nitrate, iron, arsenic
- Jamui, Bihar: fluoride, iron
- Jehanabad, Bihar: high salinity, nitrate
- Kaimur, Bihar: nitrate, iron
- Katihar, Bihar: nitrate, iron, arsenic
- Khagaria, Bihar: nitrate, iron, arsenic
- Kishanganj, Bihar: nitrate, iron, arsenic
- Lakhisarai, Bihar: high salinity, iron
- Madhepura, Bihar: nitrate, iron, arsenic
- Madhubani, Bihar: nitrate, iron, arsenic, manganese
- Munger, Bihar: iron
- Muzaffarpur, Bihar: nitrate, iron, arsenic
- Nalanda, Bihar: high salinity, fluoride, nitrate, iron
- Nawada, Bihar: fluoride, nitrate, iron
- Patna, Bihar: nitrate, iron
- Purnia, Bihar: not listed in the 2024 or 2025 exceedance tables
- Rohtas, Bihar: iron
- Saharsa, Bihar: fluoride, nitrate, iron
- Samastipur, Bihar: fluoride, nitrate, iron, arsenic
- Saran, Bihar: nitrate, iron, arsenic
- Sheikhpura, Bihar: fluoride, nitrate, iron
- Sheohar, Bihar: nitrate, iron, arsenic, manganese
- Sitamarhi, Bihar: nitrate, iron, arsenic
- Siwan, Bihar: high salinity, nitrate, iron, uranium
- Supaul, Bihar: fluoride, nitrate, iron, arsenic
- Vaishali, Bihar: high salinity, nitrate, iron
- West Champaran, Bihar: nitrate, iron, arsenic
- Chandigarh, Chandigarh: manganese
- Balod, Chhattisgarh: nitrate
- Balodabazar, Chhattisgarh: nitrate, iron
- Balrampur, Chhattisgarh: nitrate, iron
- Bastar, Chhattisgarh: fluoride, iron
- Bemetara, Chhattisgarh: high salinity, nitrate
- Bijapur, Chhattisgarh: not listed in the 2024 or 2025 exceedance tables
- Bilaspur, Chhattisgarh: fluoride, nitrate, iron
- Dakshin Bastar Dantewada, Chhattisgarh: not listed in the 2024 or 2025 exceedance tables
- Dhamtari, Chhattisgarh: fluoride, nitrate, iron
- Durg, Chhattisgarh: nitrate, iron
- Gariaband, Chhattisgarh: not listed in the 2024 or 2025 exceedance tables
- Gariyabandh, Chhattisgarh: fluoride, nitrate, iron
- Janjgir-Champa, Chhattisgarh: high salinity, fluoride, nitrate, iron
- Jashpur, Chhattisgarh: nitrate
- Kabeerdham, Chhattisgarh: nitrate, iron
- Kondagaon, Chhattisgarh: iron
- Korba, Chhattisgarh: fluoride, nitrate, iron, uranium
- Koriya, Chhattisgarh: fluoride, nitrate, iron, arsenic, uranium
- Mahasamund, Chhattisgarh: fluoride, nitrate, iron
- Mungeli, Chhattisgarh: high salinity, nitrate, iron
- Narayanpur, Chhattisgarh: not listed in the 2024 or 2025 exceedance tables
- Raigarh, Chhattisgarh: fluoride, nitrate, arsenic, uranium
- Raipur, Chhattisgarh: nitrate, iron, arsenic
- Rajnandgaon, Chhattisgarh: fluoride, nitrate, iron
- Sukma, Chhattisgarh: not listed in the 2024 or 2025 exceedance tables
- Surajpur, Chhattisgarh: fluoride, nitrate, iron, uranium
- Surguja, Chhattisgarh: nitrate, iron
- Uttar Bastar Kanker, Chhattisgarh: fluoride, nitrate
- Dadra and Nagar Haveli, Dadra & Nagar Haveli: not listed in the 2024 or 2025 exceedance tables
- Daman, Dadra & Nagar Haveli: not listed in the 2024 or 2025 exceedance tables
- Diu, Dadra & Nagar Haveli: high salinity
- Central, Delhi: high salinity, nitrate, manganese
- Delhi, Delhi: not listed in the 2024 or 2025 exceedance tables
- East, Delhi: nitrate, iron, arsenic
- New Delhi, Delhi: fluoride, nitrate
- North, Delhi: high salinity, fluoride, nitrate, iron, uranium, manganese, lead
- North East, Delhi: high salinity
- North West, Delhi: high salinity, fluoride, nitrate, uranium, manganese, lead
- Shahdara, Delhi: high salinity, fluoride
- South, Delhi: fluoride, nitrate, uranium, manganese
- South East, Delhi: high salinity, fluoride, nitrate, iron, arsenic, uranium
- South West, Delhi: high salinity, fluoride, nitrate, uranium, manganese, lead
- West, Delhi: high salinity, fluoride, nitrate, uranium, manganese, lead
- North Goa, Goa: nitrate, manganese
- South Goa, Goa: not listed in the 2024 or 2025 exceedance tables
- Ahmedabad, Gujarat: high salinity, fluoride, nitrate
- Amreli, Gujarat: high salinity, fluoride, nitrate
- Anand, Gujarat: high salinity, fluoride, nitrate, iron
- Aravalli, Gujarat: fluoride, nitrate
- Banaskantha, Gujarat: high salinity, fluoride, nitrate, iron
- Bharuch, Gujarat: high salinity, nitrate, iron
- Bhavnagar, Gujarat: high salinity, fluoride, nitrate, iron, uranium
- Botad, Gujarat: high salinity, fluoride, uranium
- Chhota Udepur, Gujarat: high salinity, fluoride, nitrate, iron
- Dahod, Gujarat: fluoride, nitrate, iron
- Dang, Gujarat: not listed in the 2024 or 2025 exceedance tables
- Devbhumi Dwarka, Gujarat: high salinity, fluoride, nitrate
- Gandhinagar, Gujarat: not listed in the 2024 or 2025 exceedance tables
- Gir Somnath, Gujarat: high salinity, fluoride, nitrate
- Jamnagar, Gujarat: high salinity, fluoride, nitrate, iron
- Junagadh, Gujarat: high salinity, fluoride, nitrate
- Kachchh, Gujarat: high salinity, fluoride, nitrate
- Kheda, Gujarat: high salinity, nitrate
- Mahisagar, Gujarat: not listed in the 2024 or 2025 exceedance tables
- Mehsana, Gujarat: high salinity, fluoride, arsenic
- Morbi, Gujarat: high salinity, fluoride, nitrate
- Narmada, Gujarat: high salinity, fluoride
- Navsari, Gujarat: high salinity
- Panchmahal, Gujarat: fluoride, nitrate, iron
- Patan, Gujarat: high salinity, fluoride, uranium, manganese
- Porbandar, Gujarat: high salinity, fluoride, nitrate, iron
- Rajkot, Gujarat: high salinity, fluoride, nitrate, iron
- Sabarkantha, Gujarat: high salinity, fluoride, nitrate
- Surat, Gujarat: fluoride, nitrate
- Surendranagar, Gujarat: high salinity, fluoride, nitrate, manganese
- Tapi, Gujarat: nitrate
- Vadodara, Gujarat: high salinity, fluoride, nitrate
- Valsad, Gujarat: high salinity, nitrate
- Ambala, Haryana: high salinity, nitrate, iron, uranium
- Bhiwani, Haryana: high salinity, fluoride, nitrate, iron, arsenic, uranium, manganese
- Charkhi Dadri, Haryana: high salinity, fluoride, nitrate
- Faridabad, Haryana: high salinity, nitrate, iron, uranium
- Fatehabad, Haryana: high salinity, fluoride, nitrate, arsenic, uranium
- Gurugram, Haryana: high salinity, fluoride, nitrate, uranium
- Hisar, Haryana: high salinity, fluoride, nitrate, iron, uranium
- Jhajjar, Haryana: high salinity, fluoride, nitrate, uranium
- Jind, Haryana: high salinity, fluoride, nitrate, uranium
- Kaithal, Haryana: high salinity, fluoride, nitrate, iron, uranium
- Karnal, Haryana: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Kurukshetra, Haryana: nitrate, uranium
- Mahendragarh, Haryana: high salinity, fluoride, nitrate
- Nuh, Haryana: high salinity, fluoride, nitrate, uranium
- Palwal, Haryana: high salinity, fluoride, nitrate, iron, uranium
- Panchkula, Haryana: high salinity, fluoride, nitrate, iron
- Panipat, Haryana: high salinity, fluoride, nitrate, iron, uranium, manganese
- Rewari, Haryana: high salinity, fluoride, nitrate, iron
- Rohtak, Haryana: high salinity, fluoride, nitrate, arsenic
- Sirsa, Haryana: high salinity, fluoride, nitrate, iron, uranium
- Sonipat, Haryana: high salinity, fluoride, nitrate, iron, arsenic, uranium, manganese
- Yamunanagar, Haryana: nitrate, iron, manganese
- Bilaspur, Himachal Pradesh: nitrate
- Chamba, Himachal Pradesh: fluoride
- Hamirpur, Himachal Pradesh: nitrate, iron
- Kangra, Himachal Pradesh: nitrate, iron
- Kinnaur, Himachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Kullu, Himachal Pradesh: nitrate
- Lahaul and Spiti, Himachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Mandi, Himachal Pradesh: nitrate, iron
- Shimla, Himachal Pradesh: not listed in the 2024 or 2025 exceedance tables
- Sirmaur, Himachal Pradesh: fluoride, nitrate, iron
- Solan, Himachal Pradesh: nitrate
- Una, Himachal Pradesh: fluoride, nitrate, iron
- Anantnag, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Bandipora, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Baramulla, Jammu & Kashmir: nitrate, iron, arsenic
- Budgam, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Doda, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Ganderbal, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Jammu, Jammu & Kashmir: nitrate, iron, arsenic, uranium, manganese
- Kathua, Jammu & Kashmir: nitrate, iron
- Kishtwar, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Kulgam, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Kupwara, Jammu & Kashmir: nitrate, iron, arsenic, manganese
- Mirpur, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Muzaffarabad, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Pulwama, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Punch, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Rajouri, Jammu & Kashmir: nitrate
- Ramban, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Reasi, Jammu & Kashmir: iron, manganese
- Samba, Jammu & Kashmir: nitrate, iron
- Shopiyan, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Srinagar, Jammu & Kashmir: not listed in the 2024 or 2025 exceedance tables
- Udhampur, Jammu & Kashmir: nitrate
- Bokaro, Jharkhand: fluoride, nitrate, iron
- Chatra, Jharkhand: fluoride, nitrate, iron
- Deoghar, Jharkhand: nitrate, iron
- Dhanbad, Jharkhand: fluoride, nitrate, iron
- Dumka, Jharkhand: nitrate, iron
- East Singhbhum, Jharkhand: iron
- Garhwa, Jharkhand: nitrate
- Giridih, Jharkhand: fluoride, nitrate, iron
- Godda, Jharkhand: fluoride, nitrate, iron
- Gumla, Jharkhand: nitrate, iron
- Hazaribagh, Jharkhand: fluoride, nitrate, iron
- Jamtara, Jharkhand: nitrate, iron
- Khunti, Jharkhand: iron
- Koderma, Jharkhand: fluoride, nitrate, iron
- Latehar, Jharkhand: fluoride, nitrate, iron
- Lohardaga, Jharkhand: nitrate, iron
- Pakur, Jharkhand: iron
- Palamu, Jharkhand: fluoride, nitrate, iron
- Ramgarh, Jharkhand: fluoride, iron
- Ranchi, Jharkhand: nitrate, iron
- Sahibganj, Jharkhand: nitrate, iron, arsenic
- Saraikela-Kharsawan, Jharkhand: not listed in the 2024 or 2025 exceedance tables
- Simdega, Jharkhand: nitrate, iron
- West Singhbhum, Jharkhand: iron
- Bagalkote, Karnataka: high salinity, fluoride, nitrate
- Belgaum, Karnataka: high salinity, nitrate, manganese
- Bellary, Karnataka: high salinity, fluoride, nitrate, uranium
- Bengaluru Rural, Karnataka: fluoride, nitrate
- Bengaluru Urban, Karnataka: nitrate, uranium, manganese
- Bidar, Karnataka: nitrate
- Bijapur, Karnataka: high salinity, fluoride, nitrate
- Chamarajanagara, Karnataka: high salinity, nitrate
- Chikkaballapura, Karnataka: fluoride, nitrate, uranium, manganese
- Chikkamagaluru, Karnataka: high salinity
- Chitradurga, Karnataka: high salinity, fluoride, nitrate, manganese
- Dakshina Kannada, Karnataka: nitrate, iron, manganese
- Davanagere, Karnataka: high salinity, fluoride, nitrate, manganese
- Dharwad, Karnataka: high salinity, fluoride, nitrate
- Gadag, Karnataka: high salinity, fluoride, nitrate, arsenic
- Gulbarga, Karnataka: fluoride, nitrate
- Hassan, Karnataka: nitrate, manganese
- Haveri, Karnataka: fluoride, nitrate
- Kodagu, Karnataka: nitrate, manganese
- Kolar, Karnataka: fluoride, nitrate, uranium, manganese
- Koppal, Karnataka: high salinity, fluoride, nitrate
- Mandya, Karnataka: fluoride, nitrate, manganese
- Mysore, Karnataka: fluoride, nitrate
- Raichur, Karnataka: high salinity, fluoride, nitrate, arsenic, uranium, lead
- Ramanagara, Karnataka: fluoride, nitrate
- Shivamogga, Karnataka: nitrate, manganese
- Tumkur, Karnataka: high salinity, fluoride, nitrate, uranium, manganese
- Udupi, Karnataka: iron
- Uttara Kannada, Karnataka: nitrate, iron, manganese
- Vijayanagara, Karnataka: high salinity, fluoride, nitrate, uranium
- Yadgir, Karnataka: high salinity, fluoride, nitrate
- Alappuzha, Kerala: nitrate, iron
- Ernakulam, Kerala: nitrate, iron
- Idukki, Kerala: nitrate, iron
- Kannur, Kerala: nitrate
- Kasaragod, Kerala: nitrate, iron
- Kollam, Kerala: nitrate, iron, arsenic
- Kottayam, Kerala: nitrate, iron
- Kozhikode, Kerala: nitrate, iron
- Malappuram, Kerala: nitrate, iron
- Palakkad, Kerala: fluoride, nitrate, iron
- Pathanamthitta, Kerala: nitrate
- Thiruvananthapuram, Kerala: nitrate, iron
- Thrissur, Kerala: nitrate, iron
- Wayanad, Kerala: nitrate, iron
- Kargil, Ladakh: not listed in the 2024 or 2025 exceedance tables
- Leh, Ladakh: not listed in the 2024 or 2025 exceedance tables
- Lakshadweep, Lakshadweep: not listed in the 2024 or 2025 exceedance tables
- Agar malwa, Madhya Pradesh: nitrate, iron
- Alirajpur, Madhya Pradesh: fluoride, nitrate
- Anuppur, Madhya Pradesh: nitrate
- Ashok Nagar, Madhya Pradesh: iron
- Balaghat, Madhya Pradesh: nitrate, iron
- Barwani, Madhya Pradesh: nitrate
- Betul, Madhya Pradesh: fluoride, nitrate
- Bhind, Madhya Pradesh: high salinity, nitrate, lead
- Bhopal, Madhya Pradesh: not listed in the 2024 or 2025 exceedance tables
- Burhanpur, Madhya Pradesh: nitrate, iron, lead
- Chhatarpur, Madhya Pradesh: nitrate, uranium, manganese
- Chhindwara, Madhya Pradesh: fluoride, nitrate, iron, manganese
- Damoh, Madhya Pradesh: nitrate, iron
- Datia, Madhya Pradesh: high salinity, nitrate, uranium, lead
- Dewas, Madhya Pradesh: fluoride, nitrate
- Dhar, Madhya Pradesh: fluoride, nitrate, manganese
- Dindori, Madhya Pradesh: fluoride, manganese
- Guna, Madhya Pradesh: nitrate, lead
- Gwalior, Madhya Pradesh: high salinity, nitrate, iron, arsenic, uranium, manganese
- Harda, Madhya Pradesh: fluoride, nitrate
- Hoshangabad, Madhya Pradesh: high salinity
- Indore, Madhya Pradesh: high salinity, nitrate
- Jabalpur, Madhya Pradesh: nitrate, arsenic, manganese
- Jhabua, Madhya Pradesh: nitrate
- Katni, Madhya Pradesh: fluoride, nitrate
- Khandwa, Madhya Pradesh: nitrate, iron
- Khargone, Madhya Pradesh: nitrate
- Mandla, Madhya Pradesh: fluoride, nitrate, manganese
- Mandsaur, Madhya Pradesh: nitrate, manganese
- Morena, Madhya Pradesh: nitrate
- Narsinghpur, Madhya Pradesh: nitrate
- Neemuch, Madhya Pradesh: high salinity, nitrate, iron, manganese
- Niwari, Madhya Pradesh: not listed in the 2024 or 2025 exceedance tables
- Panna, Madhya Pradesh: nitrate, iron, manganese
- Raisen, Madhya Pradesh: nitrate
- Rajgarh, Madhya Pradesh: nitrate, manganese
- Ratlam, Madhya Pradesh: nitrate, iron, manganese
- Rewa, Madhya Pradesh: nitrate
- Sagar, Madhya Pradesh: nitrate, iron, arsenic, manganese, lead
- Satna, Madhya Pradesh: nitrate
- Sehore, Madhya Pradesh: nitrate, iron, lead
- Seoni, Madhya Pradesh: fluoride, iron, manganese
- Shahdol, Madhya Pradesh: nitrate, lead
- Shajapur, Madhya Pradesh: nitrate, iron
- Sheopur, Madhya Pradesh: nitrate, manganese
- Shivpuri, Madhya Pradesh: high salinity, nitrate, uranium
- Sidhi, Madhya Pradesh: fluoride, nitrate, iron
- Singrauli, Madhya Pradesh: nitrate
- Tikamgarh, Madhya Pradesh: nitrate, iron, manganese
- Ujjain, Madhya Pradesh: nitrate, iron, manganese
- Umaria, Madhya Pradesh: nitrate
- Vidisha, Madhya Pradesh: nitrate, lead
- Ahmednagar, Maharashtra: high salinity, nitrate, iron
- Akola, Maharashtra: high salinity, fluoride, nitrate
- Amravati, Maharashtra: high salinity, nitrate
- Aurangabad, Maharashtra: high salinity, nitrate
- Beed, Maharashtra: high salinity, nitrate, iron
- Bhandara, Maharashtra: fluoride, nitrate, arsenic, uranium
- Buldhana, Maharashtra: high salinity, fluoride, nitrate, iron
- Chandrapur, Maharashtra: high salinity, fluoride, nitrate, iron
- Dhule, Maharashtra: nitrate, iron
- Gadchiroli, Maharashtra: high salinity, fluoride, nitrate, iron
- Gondia, Maharashtra: nitrate, uranium
- Hingoli, Maharashtra: fluoride, nitrate
- Jalgaon, Maharashtra: high salinity, nitrate
- Jalna, Maharashtra: high salinity, nitrate
- Kolhapur, Maharashtra: nitrate
- Latur, Maharashtra: nitrate, iron
- Mumbai City, Maharashtra: arsenic
- Mumbai Suburban, Maharashtra: not listed in the 2024 or 2025 exceedance tables
- Nagpur, Maharashtra: high salinity, nitrate, uranium
- Nanded, Maharashtra: high salinity, nitrate, iron
- Nandurbar, Maharashtra: high salinity, fluoride, nitrate, iron
- Nashik, Maharashtra: high salinity, nitrate, iron
- Osmanabad, Maharashtra: fluoride, nitrate
- Palghar, Maharashtra: not listed in the 2024 or 2025 exceedance tables
- Parbhani, Maharashtra: high salinity, fluoride, nitrate
- Pune, Maharashtra: nitrate, iron
- Raigad, Maharashtra: high salinity, nitrate
- Ratnagiri, Maharashtra: high salinity, iron
- Sangli, Maharashtra: high salinity, nitrate
- Satara, Maharashtra: high salinity, nitrate
- Sindhudurg, Maharashtra: nitrate, iron
- Solapur, Maharashtra: high salinity, nitrate, iron
- Thane, Maharashtra: high salinity, nitrate
- Wardha, Maharashtra: high salinity, nitrate, iron
- Washim, Maharashtra: nitrate, iron
- Yavatmal, Maharashtra: fluoride, nitrate
- Bishnupur, Manipur: not listed in the 2024 or 2025 exceedance tables
- Chandel, Manipur: not listed in the 2024 or 2025 exceedance tables
- Churachandpur, Manipur: not listed in the 2024 or 2025 exceedance tables
- Imphal East, Manipur: not listed in the 2024 or 2025 exceedance tables
- Imphal West, Manipur: not listed in the 2024 or 2025 exceedance tables
- Jiribam, Manipur: not listed in the 2024 or 2025 exceedance tables
- Kakching, Manipur: not listed in the 2024 or 2025 exceedance tables
- Kamjong, Manipur: not listed in the 2024 or 2025 exceedance tables
- Kangpokpi, Manipur: not listed in the 2024 or 2025 exceedance tables
- Noney, Manipur: not listed in the 2024 or 2025 exceedance tables
- Pherzawl, Manipur: not listed in the 2024 or 2025 exceedance tables
- Senapati, Manipur: iron, manganese
- Tamenglong, Manipur: not listed in the 2024 or 2025 exceedance tables
- Tengnoupal, Manipur: not listed in the 2024 or 2025 exceedance tables
- Thoubal, Manipur: not listed in the 2024 or 2025 exceedance tables
- Ukhrul, Manipur: not listed in the 2024 or 2025 exceedance tables
- East Garo Hills, Meghalaya: not listed in the 2024 or 2025 exceedance tables
- East Jaintia Hills, Meghalaya: not listed in the 2024 or 2025 exceedance tables
- East Khasi Hills, Meghalaya: iron
- North Garo Hills, Meghalaya: iron, manganese
- Ribhoi, Meghalaya: iron, manganese
- South Garo Hills, Meghalaya: manganese
- South West Garo Hills, Meghalaya: iron, manganese
- South West Khasi Hills, Meghalaya: not listed in the 2024 or 2025 exceedance tables
- West Garo Hills, Meghalaya: iron, manganese
- West Jaintia Hills, Meghalaya: not listed in the 2024 or 2025 exceedance tables
- West Khasi Hills, Meghalaya: iron
- Aizawl, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Champhai, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Hnahthial, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Khawzawl, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Kolasib, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Lawngtlai, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Lunglei, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Mamit, Mizoram: nitrate
- Saiha, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Serchhip, Mizoram: not listed in the 2024 or 2025 exceedance tables
- Chumukedima, Nagaland: iron, manganese
- Dimapur, Nagaland: iron, manganese
- Kiphire, Nagaland: not listed in the 2024 or 2025 exceedance tables
- Kohima, Nagaland: nitrate, iron, manganese
- Longleng, Nagaland: not listed in the 2024 or 2025 exceedance tables
- Mokokchung, Nagaland: fluoride, nitrate, iron, manganese
- Mon, Nagaland: not listed in the 2024 or 2025 exceedance tables
- Nuiland, Nagaland: iron, manganese
- Peren, Nagaland: not listed in the 2024 or 2025 exceedance tables
- Phek, Nagaland: nitrate, iron, manganese
- Tseminyu, Nagaland: nitrate
- Tuensang, Nagaland: not listed in the 2024 or 2025 exceedance tables
- Wokha, Nagaland: nitrate, manganese
- Zunheboto, Nagaland: iron, manganese
- Angul, Odisha: high salinity, fluoride, nitrate, iron, uranium, manganese
- Balangir, Odisha: high salinity, fluoride, nitrate, iron, uranium, manganese
- Balasore, Odisha: nitrate, iron, manganese
- Bargarh, Odisha: high salinity, fluoride, nitrate, iron, uranium, manganese
- Bhadrak, Odisha: iron, arsenic, manganese
- Boudh, Odisha: fluoride, nitrate, iron, manganese
- Cuttack, Odisha: nitrate, iron, arsenic, manganese
- Deogarh, Odisha: iron, manganese
- Dhenkanal, Odisha: high salinity, nitrate, iron, manganese
- Gajapati, Odisha: iron, manganese
- Ganjam, Odisha: high salinity, iron, arsenic, manganese
- Jagatsinghpur, Odisha: not listed in the 2024 or 2025 exceedance tables
- Jajpur, Odisha: iron, manganese
- Jharsuguda, Odisha: fluoride, iron, manganese
- Kalahandi, Odisha: fluoride, nitrate, iron, uranium, manganese, zinc
- Kandhamal, Odisha: nitrate
- Kendrapara, Odisha: nitrate, iron, manganese
- Kendujhar, Odisha: nitrate, iron, manganese
- Khordha, Odisha: nitrate, iron, manganese
- Koraput, Odisha: nitrate, iron
- Malkangiri, Odisha: nitrate, iron, manganese
- Mayurbhanj, Odisha: nitrate, iron, manganese
- Nabarangapur, Odisha: iron
- Nayagarh, Odisha: fluoride, nitrate, iron, manganese
- Nuapada, Odisha: high salinity, fluoride, nitrate, iron, manganese, lead, zinc
- Puri, Odisha: high salinity, fluoride, nitrate, iron, arsenic, manganese
- Rayagada, Odisha: nitrate
- Sambalpur, Odisha: fluoride, nitrate, iron, arsenic, manganese, lead, zinc
- Subarnapur, Odisha: fluoride, nitrate, iron, manganese
- Sundargarh, Odisha: fluoride, nitrate, iron, arsenic, manganese
- Karaikal, Puducherry: fluoride
- Mahe, Puducherry: not listed in the 2024 or 2025 exceedance tables
- Puducherry, Puducherry: nitrate, arsenic, manganese
- Yanam, Puducherry: not listed in the 2024 or 2025 exceedance tables
- Amritsar, Punjab: fluoride, nitrate, iron, arsenic, uranium, manganese
- Barnala, Punjab: nitrate, uranium
- Bathinda, Punjab: high salinity, fluoride, nitrate, iron, uranium
- Faridkot, Punjab: high salinity, fluoride, nitrate, iron, uranium
- Fatehgarh Sahib, Punjab: fluoride, nitrate, iron, uranium
- Fazilka, Punjab: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Ferozepur, Punjab: high salinity, fluoride, nitrate, arsenic, uranium
- Gurdaspur, Punjab: fluoride, nitrate, iron, arsenic, uranium, manganese
- Hoshiarpur, Punjab: fluoride, nitrate, iron, arsenic, uranium, lead
- Jalandhar, Punjab: fluoride, nitrate, uranium
- Kapurthala, Punjab: nitrate, iron, arsenic, uranium
- Ludhiana, Punjab: nitrate, iron, uranium
- Mansa, Punjab: high salinity, fluoride, nitrate, iron, uranium
- Moga, Punjab: fluoride, nitrate, uranium
- Pathankot, Punjab: nitrate, iron, arsenic, uranium, manganese
- Patiala, Punjab: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Rupnagar, Punjab: nitrate, iron, arsenic, uranium
- Sangrur, Punjab: fluoride, nitrate, iron, uranium
- Sas Nagar, Punjab: high salinity, fluoride, nitrate, iron, arsenic, manganese
- Shahid Bhagat Singh Nagar, Punjab: high salinity, fluoride, nitrate, iron, uranium, manganese
- Sri Muktsar Sahib, Punjab: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Tarn Taran, Punjab: fluoride, nitrate, iron, arsenic, uranium
- Ajmer, Rajasthan: high salinity, fluoride, nitrate, iron
- Alwar, Rajasthan: high salinity, fluoride, nitrate, uranium
- Banswara, Rajasthan: fluoride, nitrate, iron, arsenic
- Baran, Rajasthan: nitrate
- Barmer, Rajasthan: high salinity, fluoride, nitrate, uranium, lead
- Bharatpur, Rajasthan: high salinity, fluoride, nitrate, iron, uranium
- Bhilwara, Rajasthan: high salinity, fluoride, nitrate, iron, arsenic, uranium, lead
- Bikaner, Rajasthan: high salinity, fluoride, nitrate, uranium
- Bundi, Rajasthan: high salinity, fluoride, nitrate
- Chittorgarh, Rajasthan: high salinity, fluoride, nitrate
- Churu, Rajasthan: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Dausa, Rajasthan: high salinity, fluoride, nitrate, uranium
- Dholpur, Rajasthan: fluoride, nitrate, iron
- Dungarpur, Rajasthan: fluoride, iron
- Ganganagar, Rajasthan: high salinity, fluoride, nitrate, arsenic, uranium
- Hanumangarh, Rajasthan: high salinity, fluoride, nitrate, arsenic, uranium
- Jaipur, Rajasthan: high salinity, fluoride, nitrate, iron, uranium
- Jaisalmer, Rajasthan: high salinity, fluoride, nitrate, iron, uranium
- Jalore, Rajasthan: high salinity, fluoride, nitrate, uranium
- Jhalawar, Rajasthan: fluoride, nitrate, iron
- Jhunjhunu, Rajasthan: high salinity, fluoride, nitrate, uranium
- Jodhpur, Rajasthan: high salinity, fluoride, nitrate, arsenic, uranium
- Karauli, Rajasthan: high salinity, fluoride, nitrate, uranium
- Kota, Rajasthan: not listed in the 2024 or 2025 exceedance tables
- Nagaur, Rajasthan: high salinity, fluoride, nitrate, uranium
- Pali, Rajasthan: high salinity, fluoride, nitrate, uranium
- Pratapgarh, Rajasthan: fluoride, nitrate, iron
- Rajsamand, Rajasthan: high salinity, fluoride, nitrate, iron, uranium
- Sawai Madhopur, Rajasthan: high salinity, fluoride, nitrate, uranium
- Sikar, Rajasthan: high salinity, fluoride, nitrate, iron, uranium
- Sirohi, Rajasthan: high salinity, fluoride, nitrate, iron, arsenic
- Tonk, Rajasthan: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Udaipur, Rajasthan: high salinity, fluoride, nitrate, iron
- East Sikkim, Sikkim: not listed in the 2024 or 2025 exceedance tables
- North Sikkim, Sikkim: not listed in the 2024 or 2025 exceedance tables
- South Sikkim, Sikkim: not listed in the 2024 or 2025 exceedance tables
- West Sikkim, Sikkim: not listed in the 2024 or 2025 exceedance tables
- Ariyalur, Tamil Nadu: fluoride, nitrate, manganese
- Chengalpattu, Tamil Nadu: nitrate
- Chennai, Tamil Nadu: high salinity, fluoride, nitrate, arsenic, manganese
- Coimbatore, Tamil Nadu: high salinity, fluoride, nitrate, iron, manganese
- Cuddalore, Tamil Nadu: high salinity, fluoride, nitrate, iron, arsenic, uranium, manganese
- Dharmapuri, Tamil Nadu: high salinity, fluoride, nitrate, arsenic, manganese
- Dindigul, Tamil Nadu: high salinity, fluoride, nitrate, uranium, manganese
- Erode, Tamil Nadu: high salinity, fluoride, nitrate, iron, uranium
- Kallakurichi, Tamil Nadu: nitrate
- Kancheepuram, Tamil Nadu: high salinity, nitrate, iron, manganese
- Kanyakumari, Tamil Nadu: nitrate
- Karur, Tamil Nadu: fluoride, nitrate, iron
- Krishnagiri, Tamil Nadu: high salinity, fluoride, nitrate, iron, uranium, manganese
- Madurai, Tamil Nadu: fluoride, nitrate, iron, uranium
- Mayiladuthurai, Tamil Nadu: iron
- Nagapattinam, Tamil Nadu: high salinity, nitrate, iron, arsenic, manganese
- Namakkal, Tamil Nadu: high salinity, fluoride, nitrate, iron, uranium
- Nilgiris, Tamil Nadu: high salinity, fluoride, nitrate, iron
- Perambalur, Tamil Nadu: high salinity, fluoride, nitrate, uranium
- Pudukkottai, Tamil Nadu: high salinity, fluoride, nitrate, iron, uranium, manganese, zinc
- Ramanathapuram, Tamil Nadu: high salinity, nitrate, arsenic, uranium
- Ranipet, Tamil Nadu: fluoride, manganese
- Salem, Tamil Nadu: high salinity, fluoride, nitrate, uranium
- Sivaganga, Tamil Nadu: high salinity, nitrate, arsenic, manganese
- Tenkasi, Tamil Nadu: high salinity, fluoride, nitrate, manganese
- Thanjavur, Tamil Nadu: nitrate, iron
- Theni, Tamil Nadu: high salinity, fluoride, nitrate, iron
- Thoothukkudi, Tamil Nadu: high salinity, fluoride, nitrate, iron, arsenic, uranium, manganese
- Tiruchirappalli, Tamil Nadu: high salinity, nitrate, uranium, manganese
- Tirunelveli, Tamil Nadu: high salinity, fluoride, nitrate
- Tirupathur, Tamil Nadu: high salinity, nitrate
- Tiruppur, Tamil Nadu: high salinity, fluoride, nitrate, lead
- Tiruvallur, Tamil Nadu: high salinity, nitrate, iron, arsenic, manganese
- Tiruvannamalai, Tamil Nadu: high salinity, nitrate, arsenic, manganese
- Tiruvarur, Tamil Nadu: high salinity, nitrate, iron
- Vellore, Tamil Nadu: high salinity, fluoride, nitrate
- Viluppuram, Tamil Nadu: high salinity, fluoride, nitrate, iron, lead
- Virudhunagar, Tamil Nadu: high salinity, fluoride, nitrate, uranium
- Adilabad, Telangana: fluoride, nitrate, iron
- Bhadradri Kothagudem, Telangana: high salinity, fluoride, nitrate
- Hanamkonda, Telangana: fluoride, nitrate
- Hyderabad, Telangana: fluoride, iron
- Jagtial, Telangana: fluoride, nitrate
- Jangaon, Telangana: high salinity, fluoride, nitrate
- Jayashankar Bhupalapally, Telangana: high salinity, nitrate
- Jogulamba Gadwal, Telangana: high salinity, nitrate
- Kamareddy, Telangana: fluoride, nitrate
- Karimnagar, Telangana: fluoride, nitrate
- Khammam, Telangana: high salinity, fluoride, nitrate
- Komaram Bheem Asifabad, Telangana: high salinity, fluoride, nitrate
- Mahabubabad, Telangana: fluoride, nitrate
- Mahabubnagar, Telangana: fluoride, nitrate, iron
- Mancherial, Telangana: high salinity, fluoride, nitrate
- Medak, Telangana: high salinity, fluoride, nitrate, iron
- Medchal Malkajgiri, Telangana: fluoride, nitrate
- Mulugu, Telangana: nitrate
- Nagarkurnool, Telangana: high salinity, fluoride, nitrate
- Nalgonda, Telangana: high salinity, fluoride, nitrate, iron, arsenic
- Narayanpet, Telangana: nitrate
- Nirmal, Telangana: fluoride, nitrate
- Nizamabad, Telangana: fluoride, nitrate, iron
- Peddapalli, Telangana: high salinity, fluoride, nitrate
- Rajanna Sircilla, Telangana: fluoride, nitrate
- Rangareddy, Telangana: high salinity, fluoride, nitrate, iron
- Sangareddy, Telangana: high salinity, fluoride, nitrate
- Siddipet, Telangana: high salinity, fluoride, nitrate
- Suryapet, Telangana: fluoride, nitrate
- Vikarabad, Telangana: fluoride, nitrate
- Wanaparthy, Telangana: fluoride, nitrate
- Warangal, Telangana: high salinity, fluoride, nitrate, iron
- Yadadri Bhuvanagiri, Telangana: high salinity, fluoride, nitrate
- Dhalai, Tripura: nitrate, iron, manganese
- Gomati, Tripura: iron, manganese
- Khowai, Tripura: iron, manganese
- North Tripura, Tripura: nitrate, iron, manganese
- Sipahijala, Tripura: manganese
- South Tripura, Tripura: iron, manganese
- Unokoti, Tripura: not listed in the 2024 or 2025 exceedance tables
- West Tripura, Tripura: nitrate, manganese
- Agra, Uttar Pradesh: high salinity, fluoride, nitrate, uranium
- Aligarh, Uttar Pradesh: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Ambedkar Nagar, Uttar Pradesh: iron
- Amethi, Uttar Pradesh: high salinity, nitrate, iron, uranium
- Amroha, Uttar Pradesh: nitrate, iron, uranium, manganese
- Auraiya, Uttar Pradesh: fluoride, nitrate, iron, uranium, manganese
- Ayodhya (Faizabad), Uttar Pradesh: iron, arsenic
- Azamgarh, Uttar Pradesh: fluoride, iron, arsenic, uranium
- Baghpat, Uttar Pradesh: nitrate, arsenic
- Bahraich, Uttar Pradesh: iron, arsenic
- Ballia, Uttar Pradesh: iron, arsenic
- Balrampur, Uttar Pradesh: nitrate, iron, arsenic, manganese
- Banda, Uttar Pradesh: nitrate, iron, uranium
- Barabanki, Uttar Pradesh: iron, arsenic
- Bareilly, Uttar Pradesh: iron, arsenic, uranium, manganese
- Basti, Uttar Pradesh: iron, arsenic
- Bhadohi, Uttar Pradesh: nitrate, iron, uranium
- Bijnor, Uttar Pradesh: nitrate, iron, arsenic, uranium, manganese
- Budaun, Uttar Pradesh: nitrate, iron, uranium, manganese, lead
- Bulandshahr, Uttar Pradesh: fluoride, nitrate, iron, arsenic, uranium, manganese
- Chandauli, Uttar Pradesh: iron, lead
- Chitrakoot, Uttar Pradesh: nitrate, iron, manganese
- Deoria, Uttar Pradesh: iron, arsenic, uranium
- Etah, Uttar Pradesh: nitrate, iron, uranium, manganese
- Etawah, Uttar Pradesh: high salinity, nitrate, iron, uranium
- Farrukhabad, Uttar Pradesh: fluoride, iron, arsenic
- Fatehpur, Uttar Pradesh: fluoride, nitrate, iron, arsenic, uranium, manganese
- Firozabad, Uttar Pradesh: high salinity, fluoride, nitrate
- Gautam Buddha Nagar, Uttar Pradesh: high salinity, fluoride, nitrate, uranium
- Ghaziabad, Uttar Pradesh: high salinity, nitrate, iron, uranium, manganese
- Ghazipur, Uttar Pradesh: high salinity, fluoride, nitrate, iron, uranium, manganese
- Gonda, Uttar Pradesh: iron, arsenic
- Gorakhpur, Uttar Pradesh: nitrate, iron, arsenic, manganese
- Hamirpur, Uttar Pradesh: high salinity, nitrate, iron
- Hapur, Uttar Pradesh: nitrate, iron, uranium
- Hardoi, Uttar Pradesh: iron, arsenic, uranium, manganese
- Hathras, Uttar Pradesh: high salinity, fluoride, nitrate, iron, uranium
- Jalaun, Uttar Pradesh: nitrate, iron, uranium
- Jaunpur, Uttar Pradesh: nitrate, iron, uranium
- Jhansi, Uttar Pradesh: fluoride, nitrate, iron, uranium, manganese
- Kannauj, Uttar Pradesh: fluoride, iron, uranium
- Kanpur Dehat, Uttar Pradesh: fluoride, nitrate, iron, uranium
- Kanpur Nagar, Uttar Pradesh: fluoride, nitrate, iron, uranium
- Kasganj, Uttar Pradesh: nitrate, iron, uranium
- Kaushambi, Uttar Pradesh: fluoride, nitrate
- Kushinagar, Uttar Pradesh: iron, arsenic, manganese
- Lakhimpur Kheri, Uttar Pradesh: iron, arsenic, manganese
- Lalitpur, Uttar Pradesh: fluoride, nitrate, iron, uranium, manganese
- Lucknow, Uttar Pradesh: fluoride, nitrate, iron
- Maharajganj, Uttar Pradesh: iron
- Mahoba, Uttar Pradesh: fluoride, nitrate, iron, uranium, manganese
- Mainpuri, Uttar Pradesh: high salinity, fluoride, nitrate, iron, arsenic, uranium
- Mathura, Uttar Pradesh: high salinity, fluoride, nitrate, uranium, manganese
- Mau, Uttar Pradesh: iron
- Meerut, Uttar Pradesh: fluoride, nitrate, iron, uranium, manganese
- Mirzapur, Uttar Pradesh: nitrate, iron, arsenic, uranium, manganese
- Moradabad, Uttar Pradesh: nitrate, iron, arsenic, manganese
- Muzaffarnagar, Uttar Pradesh: nitrate, iron, manganese
- Pilibhit, Uttar Pradesh: nitrate, iron, arsenic, manganese
- Pratapgarh, Uttar Pradesh: fluoride, iron, uranium, manganese
- Prayagraj (Allahabad), Uttar Pradesh: fluoride, nitrate, iron, uranium
- Raebareli, Uttar Pradesh: fluoride, iron, arsenic, uranium
- Rampur, Uttar Pradesh: nitrate, iron, arsenic, uranium
- Saharanpur, Uttar Pradesh: iron, arsenic, uranium
- Sambhal, Uttar Pradesh: nitrate, iron, arsenic
- Sant Kabir Nagar, Uttar Pradesh: iron, arsenic
- Shahjahanpur, Uttar Pradesh: nitrate, iron, arsenic, uranium
- Shamli, Uttar Pradesh: nitrate, iron, uranium
- Shrawasti, Uttar Pradesh: nitrate, iron
- Siddharthnagar, Uttar Pradesh: nitrate, iron, arsenic
- Sitapur, Uttar Pradesh: iron
- Sonbhadra, Uttar Pradesh: fluoride, nitrate, iron, arsenic, uranium, manganese
- Sultanpur, Uttar Pradesh: uranium
- Unnao, Uttar Pradesh: high salinity, fluoride, nitrate, iron, uranium, manganese
- Varanasi, Uttar Pradesh: nitrate, iron, uranium, manganese
- Almora, Uttarakhand: fluoride, nitrate, iron, arsenic
- Bageshwar, Uttarakhand: nitrate, iron, manganese
- Chamoli, Uttarakhand: iron, manganese
- Champawat, Uttarakhand: nitrate, iron
- Dehradun, Uttarakhand: nitrate, iron, manganese
- Haridwar, Uttarakhand: nitrate, iron, arsenic, uranium, manganese
- Nainital, Uttarakhand: nitrate, iron, manganese
- Pauri Garhwal, Uttarakhand: iron, manganese, zinc
- Pithoragarh, Uttarakhand: nitrate, iron
- Rudraprayag, Uttarakhand: not listed in the 2024 or 2025 exceedance tables
- Tehri Garhwal, Uttarakhand: iron, manganese
- Udham Singh Nagar, Uttarakhand: nitrate, iron, arsenic, manganese
- Uttarkashi, Uttarakhand: fluoride, nitrate, iron
- Alipurduar, West Bengal: nitrate, iron, manganese
- Bankura, West Bengal: high salinity, nitrate, iron, manganese
- Birbhum, West Bengal: fluoride, nitrate, iron, manganese
- Cooch Behar, West Bengal: nitrate, iron, arsenic, manganese
- Dakshin Dinajpur, West Bengal: fluoride, nitrate, iron, manganese
- Darjeeling, West Bengal: nitrate, iron
- Hooghly, West Bengal: nitrate, iron, arsenic, manganese
- Howrah, West Bengal: high salinity, nitrate, iron, arsenic, manganese
- Jalpaiguri, West Bengal: nitrate, iron
- Jhargram, West Bengal: nitrate, iron
- Kalimpong, West Bengal: not listed in the 2024 or 2025 exceedance tables
- Kolkata, West Bengal: iron
- Malda, West Bengal: high salinity, fluoride, nitrate, iron, arsenic, manganese
- Murshidabad, West Bengal: high salinity, nitrate, iron, arsenic, manganese
- Nadia, West Bengal: nitrate, iron, arsenic, manganese
- North 24 Parganas, West Bengal: high salinity, fluoride, nitrate, iron, arsenic, manganese, zinc
- Paschim Bardhaman, West Bengal: fluoride, nitrate, iron, manganese
- Paschim Medinipur, West Bengal: nitrate, iron
- Purba Bardhaman, West Bengal: nitrate, iron, manganese
- Purba Medinipur, West Bengal: iron
- Purulia, West Bengal: high salinity, nitrate, manganese
- South 24 Parganas, West Bengal: high salinity, nitrate, iron, arsenic, manganese
- Uttar Dinajpur, West Bengal: nitrate, iron