Tap Water Quality Report
Tap water quality in BROCKTON, Massachusetts
Tap water in BROCKTON, Massachusetts receives a grade of F (48/100) from TapWaterSafety.org. It's served by BROCKTON WATER DEPARTMENT. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in BROCKTON's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving BROCKTON.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) 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 1.51 ppt, 1510x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 36.4 ppb, 607x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 43.3 ppb, 289x above the EWG health guideline of 0.15 ppb.
Recommended filters for BROCKTON
Filters matched to the specific contaminants in BROCKTON'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 BROCKTON'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) PFAS |
4.17 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | EPA violation |
| Perfluorooctane sulfonate (PFOS) PFAS |
4.56 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | EPA violation |
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.51 ppt | 0.001 | 10.0 | — | — | — | — | 1510× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
36.4 ppb | 0.06 | — | — | — | — | — | 607× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
43.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 289× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
19.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 192× over |
| Bromodichloromethane Disinfection byproduct |
10.7 ppb | 0.06 | — | — | — | — | — | 179× over |
| Perfluorononanoic acid (PFNA) PFAS |
1.04 ppt | 0.006 | 10.0 | — | — | — | — | 173× over |
| Trichloroacetic acid Disinfection byproduct |
10.7 ppb | 0.1 | — | — | — | — | — | 107× over |
| Chloroform Disinfection byproduct |
26.6 ppb | 0.4 | — | — | — | — | — | 67× over |
| Dibromochloromethane Disinfection byproduct |
4.09 ppb | 0.1 | — | — | — | — | — | 41× over |
| Dichloroacetic acid Disinfection byproduct |
7.12 ppb | 0.2 | — | — | — | — | — | 36× over |
| Perfluorodecanoic acid (PFDA) PFAS |
0.208 ppt | 0.006 | — | — | — | — | — | 35× over |
| Dibromoacetic acid Disinfection byproduct |
0.307 ppb | 0.03 | — | — | — | — | — | 10× over |
| Bromoform Disinfection byproduct |
0.774 ppb | 0.5 | — | — | — | — | — | 1.5× over |
| Nitrate Inorganic |
0.211 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.5× over |
| Chlorate Disinfection byproduct |
166.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Chloromethane Other |
2.13 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
67.5 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Chromium (hexavalent) Heavy metal |
0.00925 ppb | 0.02 | — | — | — | — | — | Below guideline |
| N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) PFAS |
0.116 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Perchlorate Disinfection byproduct |
0.082 ppb | 1.0 | — | — | — | — | — | Below guideline |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) PFAS |
0.039 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
20.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.09 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
10.0 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
2.95 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.84 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.19 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0681 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Alpha-hexachlorocyclohexane Radiological |
0.00163 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 BROCKTON WATER DEPARTMENT.