County · Connecticut
Windham County, Connecticut: drinking water records
This overview covers 29 ZIP codes and 49 community water systems in Windham County. It also stands in for 5 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 Water/Nh NH1051010 | 34,000 | 240 | 5 | 0 | 0 ppb |
| Windham Water Works CT1630011 | 21,214 | 120 | 1 | 0 | 4.3 ppb |
| Putnam Water Pollution Control Authority CT1160011 | 7,300 | 300 | 5 | 0 | 2.8 ppb |
| Ctwc - Crystal System CT0690011 | 6,378 | 120 | 4 | 0 | 0.5 ppb |
| Woodstock Academy South Campus CT1691171 | 620 | 0 | 0 | 1 | 7.9 ppb |
| Pomfret School CT1120051 | 400 | 0 | 0 | 1 | 0 ppb |
| The Rectory School CT1120061 | 300 | 0 | 0 | 1 | 0.7 ppb |
| Matulaitis Nursing Home CT1160021 | 254 | 0 | 0 | 1 | 0 ppb |
| Quinebaug Mobile Home Park CT1411041 | 205 | 0 | 0 | 6 | 0 ppb |
| Woodstock Meadows Condominium Assn. CT1698011 | 180 | 0 | 0 | 1 | 2.6 ppb |
| Campbell Heights Apartments CT0229031 | 152 | 0 | 0 | 3 | 0 ppb |
| Perry Hill Estates Apartments INC. CT0030021 | 144 | 0 | 0 | 2 | 0.6 ppb |
| Ashford Hills Apartments CT0030011 | 136 | 0 | 0 | 2 | 0 ppb |
| Douglas Manor CT1631031 | 135 | 0 | 0 | 1 | 22.1 ppb |
| Birch Hills Condominiums CT0030041 | 132 | 0 | 0 | 1 | 1.8 ppb |
| Marianapolis Prep School - St Johns CT1410051 | 128 | 0 | 0 | 1 | 7.4 ppb |
| Pinecrest Condominiums CT1698041 | 110 | 0 | 0 | 9 | 1.1 ppb |
| Roseland Terrace Association, INC. CT1690021 | 100 | 0 | 0 | 3 | 0 ppb |
| Woodlawn Apartments CT0030051 | 96 | 0 | 0 | 2 | 0 ppb |
| Thompson Hill Water Co - Paula Lane Div CT1410661 | 85 | 0 | 0 | 2 | 1.4 ppb |
| Evangelical Christian Center - Main CT0037001 | 84 | 0 | 0 | 2 | 2.3 ppb |
| Cranberry Bog Apartments CT0690141 | 72 | 0 | 0 | 2 | 0 ppb |
| Chaplin Woods Condominiums CT0248011 | 69 | 0 | 0 | 2 | 14.5 ppb |
| Longview Estates, LLC CT0220011 | 69 | 0 | 0 | 1 | 1.3 ppb |
| Conrads Park CT0690071 | 60 | 0 | 0 | 5 | 0 ppb |
ZIP reports in Windham 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: 06243, 06247, 06264, 06282, 06373.
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.