COLCHESTER SEWER & WATER COMMISSION
CT · PWS ID CT0280011 · Community water system
110
contaminants tested
25
detected
4,020
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0036 ug/L | 4/8 | 2023 |
| PFOS | 0.0090 ug/L | 4/8 | 2023 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| COPPER, FREE | 362 UG/L | 63/63 | SYR4 | 2014–2019 |
| Bromodichloromethane | 8 UG/L | 24/59 | SYR4 | 2012–2019 |
| Chloroform | 19 UG/L | 24/59 | SYR4 | 2012–2019 |
| Nitrate | 2100 UG/L | 24/34 | SYR4 | 2012–2019 |
| Dibromochloromethane | 4.3 UG/L | 22/59 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 8 UG/L | 18/18 | SYR4 | 2012–2019 |
| TTHM | 30.8 UG/L | 18/19 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 14 UG/L | 18/18 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 4.5 UG/L | 18/18 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 1.9 UG/L | 15/18 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0095 mg/L | 13/13 | LCR | 2025 |
| Nitrate-Nitrite | 2100 UG/L | 12/17 | SYR4 | 2012–2019 |
| Lead | 15 UG/L | 9/63 | SYR4 | 2014–2019 |
| Bromoform | 0.7000 UG/L | 7/59 | SYR4 | 2012–2019 |
| Barium | 26 UG/L | 6/6 | SYR4 | 2012–2018 |
| Tetrachloroethylene | 0.7800 UG/L | 5/41 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 1.09 PCI/L | 2/6 | SYR4 | 2013–2018 |
| Gross Alpha, Excl. Radon and U | 6.98 PCI/L | 2/6 | SYR4 | 2013–2018 |
| Monobromoacetic acid | 1 UG/L | 2/18 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 1 UG/L | 2/18 | SYR4 | 2012–2019 |
| Fluoride | 60 UG/L | 1/6 | SYR4 | 2012–2018 |
| Selenium | 6 UG/L | 1/6 | SYR4 | 2012–2018 |
| Simazine | 0.0500 UG/L | 1/12 | SYR4 | 2013–2019 |
85 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 tetrachlorideChlordaneChromiumCombined UraniumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFMBAPFMPAPFNAPFOAPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
COLCHESTER