County · Connecticut
Litchfield County, Connecticut: drinking water records
This overview covers 40 ZIP codes and 74 community water systems in Litchfield County. It also stands in for 4 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 |
|---|---|---|---|---|---|
| Torrington Water Company CT1430011 | 37,915 | 120 | 0 | 1 | 0 ppb |
| Aquarion-New Milford Regional CT0960011 | 13,331 | 300 | 5 | 0 | 2 ppb |
| Watertown Water & Sewer Authority CT1530021 | 9,972 | 120 | 0 | 0 | 2 ppb |
| Winsted Water Works CT1620011 | 7,784 | 120 | 0 | 0 | 0 ppb |
| Watertown Fire District CT1530011 | 6,718 | 60 | 0 | 0 | 4 ppb |
| Ctwc - Naugatuck Reg-Terryville System CT1110011 | 5,607 | 120 | 0 | 0 | 0.6 ppb |
| Ctwc - Naugatuck Reg-Thomaston System CT1400011 | 3,789 | 60 | 0 | 0 | 2.8 ppb |
| Aquarion-Litchfield Regional CT0740011 | 3,097 | 240 | 0 | 0 | 0 ppb |
| Aquarion-New Hartford CT0920011 | 1,872 | 120 | 0 | 0 | 1.3 ppb |
| Sharon Water & Sewer Commission CT1250011 | 803 | 0 | 0 | 1 | 0.8 ppb |
| Sunny Valley Tax District CT0960031 | 500 | 0 | 0 | 5 | 1.6 ppb |
| Aquarion-Falls Village CT0210011 | 488 | 0 | 0 | 3 | 2 ppb |
| Village Market Place CT0550321 | 462 | 0 | 0 | 2 | 0 ppb |
| Woodbury Knoll, LLC. CT1680051 | 258 | 0 | 0 | 1 | 8.4 ppb |
| Candle Hill Mobile Home Park CT0960151 | 233 | 0 | 0 | 1 | 2 ppb |
| South Kent School CT0680082 | 228 | 0 | 0 | 1 | 7.0 ppb |
| Lillinonah Park Estates Homeowners Assn CT0960171 | 128 | 0 | 0 | 2 | 6.8 ppb |
| Heritage Hill Condominium Assn, INC CT1680061 | 120 | 0 | 0 | 1 | 5 ppb |
| Lake Hills Village Condominiums CT1660011 | 102 | 0 | 0 | 1 | 2 ppb |
| Arrow Point Water Co CT1490021 | 84 | 0 | 0 | 1 | 0 ppb |
| Woodhall School, INC CT0105033 | 68 | 0 | 0 | 3 | 1 ppb |
| Little Brook Rd Property Owners Assn CT0920041 | 64 | 0 | 0 | 3 | 0 ppb |
| Cornwall Water Company CT0311011 | 48 | 0 | 0 | 3 | 0.6 ppb |
| Eldridge Elderly Housing CT0878021 | 40 | 0 | 0 | 1 | 0 ppb |
| Aquarion-Salisbury CT1220011 | 1,932 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Litchfield 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: 06021, 06024, 06079, 06758.
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.