CHELMSFORD WATER DISTRICT
MA · PWS ID MA3056000 · Community water system
93
contaminants tested
13
detected
28,750
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0035 ug/L | 7/8 | 2024 |
| PFOA | 0.0089 ug/L | 7/8 | 2024 |
| PFOS | 0.0072 ug/L | 5/8 | 2024 |
| PFPeA | 0.0037 ug/L | 5/8 | 2024 |
| PFBS | 0.0042 ug/L | 1/8 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 103 UG/L | 220/220 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 38.2 UG/L | 168/227 | SYR4 | 2012–2019 |
| Nitrate | 1800 UG/L | 54/56 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0110 mg/L | 22/22 | LCR | 2025 |
| Barium | 46 UG/L | 9/9 | SYR4 | 2012–2018 |
| COPPER, FREE | 195 UG/L | 6/20 | SYR4 | 2019 |
| Arsenic | 5 UG/L | 3/9 | SYR4 | 2012–2018 |
| DICHLOROMETHANE | 2.21 UG/L | 1/135 | SYR4 | 2012–2019 |
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-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebETHYLENE DIBROMIDEEndrinEthylbenzeneFluorideHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
CHELMSFORD