Tap Water Quality Report
Tap water quality in STAFFORD, Connecticut
Tap water in STAFFORD, 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 STAFFORD's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving STAFFORD.
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.
Recommended filters for STAFFORD
Filters matched to the specific contaminants in STAFFORD'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.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 STAFFORD'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.