County · Connecticut
Hartford County, Connecticut: drinking water records
This overview covers 60 ZIP codes and 48 community water systems in Hartford County. It also stands in for 8 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Aquarion-Plainville Regional CT1100011 | 18,231 | 120 | 3 | 1 | 0 ppb |
| Ctwc - Unionville System CT0520011 | 14,693 | 300 | 6 | 2 | 2.4 ppb |
| Berlin Water Control Commission CT0070021 | 5,128 | 240 | 1 | 1 | 0 ppb |
| Metropolitan District Commission CT0640011 | 390,887 | 360 | 0 | 0 | 0 ppb |
| Ctwc - Northern Reg-Western System CT0473011 | 101,313 | 480 | 7 | 0 | 1.9 ppb |
| New Britain Water Department CT0890011 | 73,534 | 120 | 0 | 0 | 0 ppb |
| Bristol Water Department CT0170011 | 52,079 | 300 | 2 | 0 | 0 ppb |
| Manchester Water Department CT0770021 | 51,198 | 720 | 7 | 0 | 0 ppb |
| Southington Water Department CT1310011 | 43,069 | 420 | 7 | 0 | 0 ppb |
| Hazardville Water Company CT0490021 | 18,544 | 360 | 6 | 0 | 0.7 ppb |
| Aquarion-Simsbury Regional CT1280021 | 14,691 | 180 | 4 | 0 | 0.3 ppb |
| Avon Water Co CT0040011 | 11,590 | 360 | 4 | 0 | 2.4 ppb |
| Kensington Fire District CT0070011 | 7,553 | 180 | 0 | 0 | 2.2 ppb |
| Ctwc - Naugatuck Reg-Collinsville Sys CT0230011 | 6,324 | 180 | 2 | 0 | 0 ppb |
| Connecticut Correctional Institute CT0490031 | 2,385 | 0 | 0 | 1 | 0 ppb |
| Tariffville Fire District Water Dept CT1280011 | 1,477 | 0 | 0 | 1 | 0 ppb |
| Gqc Well Commission CT0400041 | 360 | 0 | 0 | 1 | 0 ppb |
| Turkey Hill of East Granby, LLC CT0400031 | 360 | 0 | 0 | 1 | 1 ppb |
| Ethel Walker School CT1280051 | 325 | 0 | 0 | 1 | 0.3 ppb |
| Apple Rehab CT1190021 | 238 | 0 | 0 | 1 | 0.2 ppb |
| Old Newgate Ridge Water Company INC CT0400051 | 208 | 0 | 0 | 1 | 0 ppb |
| Marlborough Health Care Center, INC CT0791001 | 165 | 0 | 0 | 1 | 0 ppb |
| Chelsea Common Condominium Association CT0408011 | 126 | 0 | 0 | 1 | 2.6 ppb |
| Juniper Club INC. CT0110051 | 104 | 0 | 0 | 8 | 2.3 ppb |
| Ctwc - Forest Homes Division CT0790011 | 100 | 0 | 0 | 2 | 2.2 ppb |
ZIP reports in Hartford County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 06020, 06022, 06027, 06059, 06060, 06065, 06090, 06091.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.