Hartford County tap water
9 of 14 water systems serving Hartford County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 47 community water systems list this county as served; 14 serve 3,300+ people with full PFAS testing.
- 18 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Metropolitan District Commission | Surface water | 390,887 | No | 0 |
| Ctwc - Northern Reg-Western System | Surface water | 101,313 | Yes | 0 |
| New Britain Water department | Surface water | 73,534 | No | 0 |
| Bristol Water department | Surface water | 52,079 | Yes | 0 |
| Manchester Water department | Surface water | 51,198 | Yes | 0 |
| Southington Water department | Surface water | 43,069 | Yes | 0 |
| Hazardville Water Company | Groundwater | 18,544 | Yes | 0 |
| Aquarion-Plainville Regional | Groundwater | 18,231 | Yes | 1 |
| Ctwc - Unionville System | Purchased surface water | 14,693 | Yes | 1 |
| Aquarion-Simsbury Regional | Groundwater | 14,691 | No | 0 |
| Avon Water CO | Groundwater | 11,590 | Yes | 0 |
| Kensington Fire District | Purchased surface water | 7,553 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.