Tap Water Quality Report
Tap water quality in EAST HAVEN, Connecticut
Tap water in EAST HAVEN, Connecticut receives a grade of F (55/100) from TapWaterSafety.org. It's served by REGIONAL WATER AUTHORITY. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in EAST HAVEN's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving EAST HAVEN.
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 34.0 ppb, 567x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 31.5 ppb, 315x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 39.4 ppb, 263x above the EWG health guideline of 0.15 ppb.
Recommended filters for EAST HAVEN
Filters matched to the specific contaminants in EAST HAVEN's water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 HAVEN'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 |
34.0 ppb | 0.06 | — | — | — | — | — | 567× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
31.5 ppb | 0.1 | 60.0 | 60 | — | — | — | 315× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
39.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 263× over |
| Trichloroacetic acid Disinfection byproduct |
17.1 ppb | 0.1 | — | — | — | — | — | 171× over |
| Bromodichloromethane Disinfection byproduct |
5.17 ppb | 0.06 | — | — | — | — | — | 86× over |
| Chloroform Disinfection byproduct |
24.3 ppb | 0.4 | — | — | — | — | — | 61× over |
| Dichloroacetic acid Disinfection byproduct |
11.0 ppb | 0.2 | — | — | — | — | — | 55× over |
| Chromium (hexavalent) Heavy metal |
0.237 ppb | 0.02 | — | — | — | — | — | 12× over |
| Dibromochloromethane Disinfection byproduct |
0.851 ppb | 0.1 | — | — | — | — | — | 8.5× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.763 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 8.5× over |
| Nitrate and nitrite Inorganic |
0.94 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.7× over |
| Nitrate Inorganic |
0.913 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.5× over |
| Radium, combined (-226 and -228) Radiological |
0.28 pCi/L | 0.05 | 5.0 | — | — | — | — | 5.5× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.32 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 4.4× over |
| Dibromoacetic acid Disinfection byproduct |
0.0719 ppb | 0.03 | — | — | — | — | — | 2.4× over |
| Manganese Heavy metal |
93.7 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Uranium Radiological |
0.4 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Chlorate Disinfection byproduct |
177.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
82.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
2.71 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Di(2-ethylhexyl) phthalate Semi-volatile organic compound |
0.146 ppb | 3.0 | 6.0 | — | — | — | — | Below guideline |
| Vanadium Other |
0.657 ppb | 21.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0104 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.468 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.00402 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.337 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.103 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0638 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Bromide Other |
26.3 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.123 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.527 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 REGIONAL WATER AUTHORITY.
General Contact
Treatment Plant
ZIP codes served
EAST HAVEN's public water systems serve the following ZIP codes: