Tap Water Quality Report
Tap water quality in RIDGEFIELD, Connecticut
Tap water in RIDGEFIELD, Connecticut receives a grade of F (59/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily DANBURY WATER DEPARTMENT. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; PFAS contamination; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in RIDGEFIELD's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving RIDGEFIELD.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 25.8 ppb, 431x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.943 ppb, 236x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 34.4 ppb, 230x above the EWG health guideline of 0.15 ppb.
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 (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 31.9 ppb, 319x above the EWG health guideline of 0.1 ppb.
Water systems serving RIDGEFIELD
RIDGEFIELD is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
DANBURY WATER DEPARTMENT
- Haloacetic acids (HAA9) significantly above health guideline
- Arsenic significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
AQUARION-EASTERN FAIRFIELD COUNTY
- PFAS contamination
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
Recommended filters for RIDGEFIELD
Filters matched to the specific contaminants in RIDGEFIELD's water supply.
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 RIDGEFIELD'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 |
58.1 ppb | 0.06 | — | — | — | — | — | 968× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
52.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 349× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
31.9 ppb | 0.1 | 60.0 | 60 | — | — | — | 319× over |
| Arsenic Heavy metal |
0.943 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 236× over |
| Trichloroacetic acid Disinfection byproduct |
18.0 ppb | 0.1 | — | — | — | — | — | 180× over |
| Bromodichloromethane Disinfection byproduct |
10.0 ppb | 0.06 | — | — | — | — | — | 167× over |
| Chloroform Disinfection byproduct |
37.1 ppb | 0.4 | — | — | — | — | — | 93× over |
| Dichloroacetic acid Disinfection byproduct |
12.6 ppb | 0.2 | — | — | — | — | — | 63× over |
| Dibromochloromethane Disinfection byproduct |
1.97 ppb | 0.1 | — | — | — | — | — | 20× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.66 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 18× over |
| Dibromoacetic acid Disinfection byproduct |
0.331 ppb | 0.03 | — | — | — | — | — | 11× over |
| Nitrate Inorganic |
0.765 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.5× over |
| Chromium (hexavalent) Heavy metal |
0.0768 ppb | 0.02 | — | — | — | — | — | 3.8× over |
| Nitrate and nitrite Inorganic |
0.525 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.7× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.893 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 3.0× over |
| Chlorate Disinfection byproduct |
520.0 ppb | 210.0 | — | — | — | — | — | 2.5× over |
| Manganese Heavy metal |
10.4 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
13.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.01 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.243 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0621 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.47 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.807 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.75 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.279 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.293 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0706 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.336 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 DANBURY WATER DEPARTMENT.
General Contact
Treatment Plant
ZIP codes served
RIDGEFIELD's public water systems serve the following ZIP codes: