HOPKINTON WATER DEPARTMENT
MA · PWS ID MA2139000 · Community water system
103
contaminants tested
23
detected
12,680
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0055 ug/L | 4/7 | 2025 |
| PFHxA | 0.0046 ug/L | 3/7 | 2025 |
| PFOA | 0.0072 ug/L | 3/7 | 2025 |
| PFPeA | 0.0058 ug/L | 2/7 | 2025 |
| PFBA | 0.0062 ug/L | 1/7 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 3070 UG/L | 132/138 | SYR4 | 2012–2019 |
| TTHM | 84 UG/L | 19/19 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 19 UG/L | 17/19 | SYR4 | 2012–2019 |
| Barium | 19 UG/L | 15/16 | SYR4 | 2012–2018 |
| LEAD SUMMARY | 0.7700 mg/L | 15/15 | LCR | 2025 |
| Bromodichloromethane | 20 UG/L | 14/14 | SYR4 | 2013–2019 |
| Chloroform | 44 UG/L | 14/14 | SYR4 | 2013–2019 |
| Dibromochloromethane | 6.4 UG/L | 14/14 | SYR4 | 2013–2019 |
| COPPER, FREE | 471 UG/L | 12/14 | SYR4 | 2013–2018 |
| Dichloroacetic Acid | 2.5 UG/L | 12/14 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 15 UG/L | 11/14 | SYR4 | 2013–2019 |
| Bromoform | 2 UG/L | 6/14 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 2.5 UG/L | 6/14 | SYR4 | 2013–2019 |
| Monochloroacetic acid | 2.02 UG/L | 2/14 | SYR4 | 2013–2019 |
| 2,4-D | 0.1580 UG/L | 1/26 | SYR4 | 2013–2019 |
| Asbestos | 0.7800 MFL | 1/1 | SYR4 | 2012 |
| Fluoride | 200 UG/L | 1/17 | SYR4 | 2012–2018 |
| Monobromoacetic acid | 0.7600 UG/L | 1/14 | SYR4 | 2013–2019 |
80 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-TP4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalArsenicAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebETHYLENE DIBROMIDEEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFOSPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
HOPKINTON