WELLESLEY WATER DIVISION
MA · PWS ID MA3317000 · Community water system
102
contaminants tested
23
detected
29,550
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0053 ug/L | 4/10 | 2025 |
| PFOA | 0.0063 ug/L | 4/10 | 2025 |
| PFPeA | 0.0043 ug/L | 4/10 | 2025 |
| PFHxA | 0.0039 ug/L | 3/10 | 2025 |
| PFOS | 0.0066 ug/L | 2/10 | 2025 |
| PFBA | 0.0052 ug/L | 1/10 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 59.8 UG/L | 132/132 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 22 UG/L | 132/132 | SYR4 | 2012–2019 |
| Bromodichloromethane | 21.3 UG/L | 120/120 | SYR4 | 2012–2019 |
| Chloroform | 17.3 UG/L | 120/120 | SYR4 | 2012–2019 |
| Dibromochloromethane | 20.8 UG/L | 120/120 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 9.3 UG/L | 116/120 | SYR4 | 2012–2019 |
| Bromoform | 7.09 UG/L | 111/120 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 6.91 UG/L | 107/120 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 8.2 UG/L | 106/120 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 3.17 UG/L | 41/120 | SYR4 | 2012–2019 |
| Nitrate | 1600 UG/L | 38/40 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0200 mg/L | 25/25 | LCR | 2025 |
| Barium | 77.9 UG/L | 6/6 | SYR4 | 2014–2017 |
| Fluoride | 980 UG/L | 6/6 | SYR4 | 2014–2017 |
| Monobromoacetic acid | 5.1 UG/L | 5/120 | SYR4 | 2012–2019 |
| COPPER, FREE | 110 UG/L | 3/3 | SYR4 | 2012 |
| Antimony, Total | 3 UG/L | 2/6 | SYR4 | 2014–2017 |
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-PF3ONSADONAArsenicAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebETHYLENE DIBROMIDEEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
WELLESLEY