WEIR RIVER WATER SYSTEM
MA · PWS ID MA4131000 · Community water system
104
contaminants tested
25
detected
45,339
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0060 ug/L | 5/8 | 2025 |
| PFOA | 0.0064 ug/L | 5/8 | 2025 |
| PFPeA | 0.0043 ug/L | 5/8 | 2025 |
| PFBA | 0.0057 ug/L | 1/8 | 2025 |
| PFBS | 0.0033 ug/L | 1/8 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 112.4 UG/L | 151/151 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 68 UG/L | 151/151 | SYR4 | 2012–2019 |
| Bromodichloromethane | 23.5 UG/L | 104/104 | SYR4 | 2014–2019 |
| Chloroform | 65.7 UG/L | 104/104 | SYR4 | 2014–2019 |
| Dibromochloromethane | 9 UG/L | 104/104 | SYR4 | 2014–2019 |
| Trichloroacetic Acid | 33 UG/L | 104/104 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 19 UG/L | 103/104 | SYR4 | 2014–2019 |
| Dibromoacetic acid | 2 UG/L | 74/104 | SYR4 | 2014–2019 |
| Monobromoacetic acid | 5.8 UG/L | 50/104 | SYR4 | 2014–2019 |
| COPPER, FREE | 640 UG/L | 48/50 | SYR4 | 2014–2016 |
| Monochloroacetic acid | 5.06 UG/L | 48/104 | SYR4 | 2014–2019 |
| Nitrate | 5100 UG/L | 32/32 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0150 mg/L | 22/22 | LCR | 2025 |
| Lead | 12 UG/L | 19/46 | SYR4 | 2016 |
| Bromoform | 1.1 UG/L | 13/104 | SYR4 | 2014–2019 |
| Barium | 100 UG/L | 10/10 | SYR4 | 2012–2019 |
| Fluoride | 1000 UG/L | 8/10 | SYR4 | 2012–2019 |
| Nitrite | 190 UG/L | 6/14 | SYR4 | 2013–2019 |
| Chromium | 5.5 UG/L | 2/10 | SYR4 | 2012–2019 |
| Combined Uranium | 1.4 UG/L | 2/2 | SYR4 | 2014 |
79 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalArsenicAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebETHYLENE DIBROMIDEEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFOSPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
HINGHAM