Tap Water Quality Report
Tap water quality in EAST WINDSOR, Connecticut
Tap water in EAST WINDSOR, Connecticut receives a grade of F (53/100) from TapWaterSafety.org. It's served by CTWC - NORTHERN REG-WESTERN SYSTEM. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in EAST WINDSOR's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving EAST WINDSOR.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 20.8 ppb, 347x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 44.4 ppb, 296x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 19.0 ppb, 190x above the EWG health guideline of 0.1 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.525 ppb.
EPA compliance record
Official U.S. EPA records for CTWC - NORTHERN REG-WESTERN SYSTEM (system ID CT0473011) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Public Notice Rule and Revised PN Rule | Other (e.g. public notice) | 06/08/2018 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for EAST WINDSOR
Filters matched to the specific contaminants in EAST WINDSOR's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in EAST WINDSOR's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
20.8 ppb | 0.06 | — | — | — | — | — | 347× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
44.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 296× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
19.0 ppb | 0.1 | 60.0 | 60 | — | — | — | 190× over |
| Bromodichloromethane Disinfection byproduct |
9.05 ppb | 0.06 | — | — | — | — | — | 151× over |
| Arsenic Heavy metal |
0.525 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 131× over |
| Trichloroacetic acid Disinfection byproduct |
11.3 ppb | 0.1 | — | — | — | — | — | 113× over |
| Chloroform Disinfection byproduct |
28.3 ppb | 0.4 | — | — | — | — | — | 71× over |
| Dichloroacetic acid Disinfection byproduct |
7.18 ppb | 0.2 | — | — | — | — | — | 36× over |
| Dibromochloromethane Disinfection byproduct |
2.37 ppb | 0.1 | — | — | — | — | — | 24× over |
| Nitrate Inorganic |
2.16 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 15× over |
| Nitrate and nitrite Inorganic |
2.02 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 14× over |
| Chromium (hexavalent) Heavy metal |
0.256 ppb | 0.02 | — | — | — | — | — | 13× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.0 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 11× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.8 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.7× over |
| Radium, combined (-226 and -228) Radiological |
0.12 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.5× over |
| Strontium-90 Radiological |
0.75 pCi/L | 0.35 | — | — | — | — | — | 2.1× over |
| Uranium Radiological |
0.39 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Dibromoacetic acid Disinfection byproduct |
0.0188 ppb | 0.03 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
83.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Benzo[a]pyrene Other |
0.00177 ppb | 0.007 | 0.2 | — | — | — | — | Below guideline |
| Barium Heavy metal |
144.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
2.57 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
10.7 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.029 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.17 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.154 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.214 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.177 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.154 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.269 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
2.53 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CTWC - NORTHERN REG-WESTERN SYSTEM.