CTWC - UNIONVILLE SYSTEM
CT · PWS ID CT0520011 · Community water system
111
contaminants tested
29
detected
14,693
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBA | 0.0070 ug/L | 2/10 | 2023 |
| PFHxA | 0.0040 ug/L | 2/10 | 2023 |
| PFHxS | 0.0030 ug/L | 2/10 | 2023 |
| PFOA | 0.0060 ug/L | 2/10 | 2023 |
| PFOS | 0.0060 ug/L | 2/10 | 2023 |
| PFPeA | 0.0040 ug/L | 2/10 | 2023 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Chloroform | 89 UG/L | 203/271 | SYR4 | 2012–2019 |
| Bromodichloromethane | 11.1 UG/L | 198/271 | SYR4 | 2012–2019 |
| TTHM | 94.5 UG/L | 183/183 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 48.6 UG/L | 174/179 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 19.5 UG/L | 173/179 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 36 UG/L | 171/179 | SYR4 | 2012–2019 |
| Nitrate | 4670 UG/L | 132/132 | SYR4 | 2012–2019 |
| Dibromochloromethane | 4.7 UG/L | 110/271 | SYR4 | 2012–2019 |
| COPPER, FREE | 1120 UG/L | 106/106 | SYR4 | 2013–2019 |
| Lead | 32 UG/L | 58/106 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 3330 UG/L | 53/53 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 3.2 UG/L | 38/88 | SYR4 | 2012–2019 |
| Barium | 467 UG/L | 17/17 | SYR4 | 2012–2019 |
| Bromoform | 1.4 UG/L | 16/271 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0150 mg/L | 11/11 | LCR | 2025 |
| Monochloroacetic acid | 7.8 UG/L | 10/179 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 2.1 UG/L | 8/179 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 1.4 UG/L | 2/88 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 0.6200 UG/L | 1/88 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 1.6 PCI/L | 1/10 | SYR4 | 2014–2019 |
| Fluoride | 50 UG/L | 1/17 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon and U | 4.2 PCI/L | 1/10 | SYR4 | 2014–2019 |
| Selenium | 1 UG/L | 1/17 | SYR4 | 2012–2019 |
82 contaminants tested, none detected
1,1,2-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, TotalArsenicAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumCombined UraniumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chloridelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
AVONBRISTOLFARMINGTONPLAINVILLE