Mashantucket Pequot Water System
CT · PWS ID 010106001 · Community water system
100
contaminants tested
18
detected
22,171
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFPeA | 0.0191 ug/L | 4/4 | 2024 |
| PFBA | 0.0065 ug/L | 3/4 | 2024 |
| PFBS | 0.0036 ug/L | 3/4 | 2024 |
| PFHpA | 0.0036 ug/L | 3/4 | 2024 |
| PFHxA | 0.0099 ug/L | 3/4 | 2024 |
| PFOA | 0.0074 ug/L | 3/4 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 140 UG/L | 127/129 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 48 UG/L | 120/129 | SYR4 | 2012–2019 |
| Nitrate | 1310 UG/L | 18/24 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0040 mg/L | 17/17 | LCR | 2025 |
| Barium | 65 UG/L | 10/10 | SYR4 | 2012–2019 |
| Arsenic | 2 UG/L | 3/10 | SYR4 | 2012–2019 |
| CYANIDE | 5 UG/L | 1/10 | SYR4 | 2012–2019 |
| Glyphosate | 6 UG/L | 1/6 | SYR4 | 2013–2019 |
| Gross Alpha, Excl. Radon and U | 10.6 PCI/L | 1/3 | SYR4 | 2015–2018 |
| Nitrite | 590 UG/L | 1/12 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.0650 UG/L | 1/6 | SYR4 | 2013–2019 |
| Picloram | 0.1250 UG/L | 1/6 | SYR4 | 2013–2019 |
82 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECadmiumCarbofuranCarbon tetrachlorideChlordaneChromiumCombined Radium (-226 and -228)Combined UraniumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneFluorideHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFDAPFDoAPFEESAPFHpSPFHxSPFMBAPFMPAPFNAPFOSPFPeSPFTAPFTrDAPFUnASeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene