CTWC - NORTHERN REG-WESTERN SYSTEM
CT · PWS ID CT0473011 · Community water system
111
contaminants tested
36
detected
101,313
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFOA | 0.0080 ug/L | 8/16 | 2025 |
| PFOS | 0.0060 ug/L | 4/16 | 2025 |
| PFPeA | 0.0030 ug/L | 2/16 | 2025 |
| PFBA | 0.0050 ug/L | 1/16 | 2025 |
| PFBS | 0.0030 ug/L | 1/16 | 2025 |
| PFHxA | 0.0030 ug/L | 1/16 | 2025 |
| PFHxS | 0.0030 ug/L | 1/16 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| COPPER, FREE | 603 UG/L | 507/515 | SYR4 | 2012–2019 |
| Dibromochloromethane | 7.8 UG/L | 336/389 | SYR4 | 2012–2019 |
| Bromodichloromethane | 18.3 UG/L | 335/389 | SYR4 | 2012–2019 |
| Chloroform | 89.1 UG/L | 333/389 | SYR4 | 2012–2019 |
| TTHM | 107.6 UG/L | 326/331 | SYR4 | 2012–2019 |
| Nitrate | 7650 UG/L | 318/326 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 36 UG/L | 311/326 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 19 UG/L | 296/326 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 20 UG/L | 291/326 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 7650 UG/L | 167/170 | SYR4 | 2012–2019 |
| Lead | 227 UG/L | 163/515 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 3 UG/L | 91/326 | SYR4 | 2012–2019 |
| Bromoform | 3.7 UG/L | 78/389 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0140 mg/L | 59/59 | LCR | 2026 |
| Barium | 407 UG/L | 40/46 | SYR4 | 2012–2019 |
| Fluoride | 1640 UG/L | 33/46 | SYR4 | 2012–2019 |
| Arsenic | 5.5 UG/L | 11/46 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 3.1 PCI/L | 11/38 | SYR4 | 2012–2018 |
| Combined Uranium | 5.7 UG/L | 8/60 | SYR4 | 2012–2018 |
| Monochloroacetic acid | 1.4 UG/L | 8/326 | SYR4 | 2012–2019 |
| Nitrite | 76 UG/L | 7/163 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon and U | 5.45 PCI/L | 4/38 | SYR4 | 2012–2018 |
| Trichloroethylene | 1 UG/L | 4/58 | SYR4 | 2012–2019 |
| Selenium | 2 UG/L | 3/46 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.7100 UG/L | 2/58 | SYR4 | 2012–2019 |
| lithium | 19.8 ug/L | 2/16 | UCMR-5 | 2025 |
| Benzo(a)pyrene | 0.0630 UG/L | 1/66 | SYR4 | 2013–2019 |
| CYANIDE | 5 UG/L | 1/46 | SYR4 | 2012–2019 |
| Chromium | 1 UG/L | 1/46 | SYR4 | 2012–2019 |
75 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, TotalAsbestosAtrazineBHC-GAMMABenzeneBeryllium, TotalCHLOROBENZENECadmiumCarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidNEtFOSAANFDHANMeFOSAAOXAMYLPFDAPFDoAPFEESAPFHpAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl chloridecis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
EAST GRANBYEAST WINDSORELLINGTONENFIELDMANCHESTERMANSFIELDSOUTH WINDSORSTAFFORDSUFFIELDTOLLANDVERNONWINDSOR LOCKS