COHASSET WATER DEPT
MA · PWS ID MA4065000 · Community water system
105
contaminants tested
24
detected
7,555
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFOA | 0.0067 ug/L | 2/3 | 2025 |
| PFBA | 0.0073 ug/L | 1/3 | 2025 |
| PFHxA | 0.0040 ug/L | 1/3 | 2025 |
| PFOS | 0.0045 ug/L | 1/3 | 2025 |
| PFPeA | 0.0046 ug/L | 1/3 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Total Haloacetic Acids (HAA5) | 82 UG/L | 129/129 | SYR4 | 2012–2019 |
| Bromodichloromethane | 29 UG/L | 128/128 | SYR4 | 2012–2019 |
| Chloroform | 93 UG/L | 128/128 | SYR4 | 2012–2019 |
| Dibromochloromethane | 14 UG/L | 128/128 | SYR4 | 2012–2019 |
| TTHM | 120 UG/L | 128/128 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 28 UG/L | 126/129 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 50 UG/L | 126/129 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 4.1 UG/L | 46/129 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 24 UG/L | 42/129 | SYR4 | 2012–2019 |
| Nitrate | 3800 UG/L | 26/30 | SYR4 | 2012–2019 |
| Bromoform | 3.2 UG/L | 23/128 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0200 mg/L | 22/22 | LCR | 2025 |
| Barium | 21 UG/L | 11/11 | SYR4 | 2012–2019 |
| Fluoride | 1200 UG/L | 10/11 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 1.2 UG/L | 7/129 | SYR4 | 2012–2019 |
| COPPER, FREE | 57 UG/L | 3/4 | SYR4 | 2015–2016 |
| Chromium | 6 UG/L | 1/11 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.1000 UG/L | 1/12 | SYR4 | 2012–2018 |
| Selenium | 2 UG/L | 1/11 | SYR4 | 2012–2019 |
81 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, TotalArsenicAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndrinEthylbenzeneGross Beta Particle ActivityHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
COHASSET