Tap Water Quality Report
Tap water quality in DIGHTON, Massachusetts
Tap water in DIGHTON, Massachusetts receives a grade of D (66/100) from TapWaterSafety.org. It's served by INIMA USA / AQUARIA LLC. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Trichloroacetic acid significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in DIGHTON's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving DIGHTON.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.213 ppt, 213x above the EWG health guideline of 0.001 ppt.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 27.0 ppb, 180x above the EWG health guideline of 0.15 ppb.
Trichloroacetic acid significantly above health guideline
Moderate concernTrichloroacetic acid detected at 9.62 ppb, 96x above the EWG health guideline of 0.1 ppb.
EPA compliance record
Official U.S. EPA records for INIMA USA / AQUARIA LLC (system ID MA4076004) for the last 3 years. Checked 2026-10-07.
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 DIGHTON
Filters matched to the specific contaminants in DIGHTON'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 like TTHM. Look for NSF/ANSI 53 VOC or chloroform reduction.
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 DIGHTON'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.213 ppt | 0.001 | 10.0 | — | — | — | — | 213× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
27.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 180× over |
| Trichloroacetic acid Disinfection byproduct |
9.62 ppb | 0.1 | — | — | — | — | — | 96× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
6.49 ppb | 0.1 | 60.0 | 60 | — | — | — | 65× over |
| Bromodichloromethane Disinfection byproduct |
2.42 ppb | 0.06 | — | — | — | — | — | 40× over |
| Chloroform Disinfection byproduct |
8.04 ppb | 0.4 | — | — | — | — | — | 20× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.077 ppt | 0.006 | 10.0 | — | — | — | — | 13× over |
| Dibromochloromethane Disinfection byproduct |
0.92 ppb | 0.1 | — | — | — | — | — | 9.2× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.566 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 6.3× over |
| Chromium (hexavalent) Heavy metal |
0.0425 ppb | 0.02 | — | — | — | — | — | 2.1× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.555 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 1.9× over |
| Chlorate Disinfection byproduct |
209.6 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Nitrate Inorganic |
0.11 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Manganese Heavy metal |
4.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) Other |
0.092 ppt | 9.0 | 10.0 | — | — | — | — | Below guideline |
| Vanadium Other |
0.138 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.394 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.189 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.159 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0205 ppb | 1500.0 | — | — | — | — | — | 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 INIMA USA / AQUARIA LLC.