GRAND COUNTY WATER NO 1
CO · PWS ID CO0125323 · Community water system
106
contaminants tested
17
detected
5,400
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBA | 0.0118 ug/L | 1/8 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 84.4 UG/L | 50/50 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 83.81 UG/L | 50/50 | SYR4 | 2012–2019 |
| Chloroform | 82.6 UG/L | 34/34 | SYR4 | 2012–2019 |
| Bromodichloromethane | 1.8 UG/L | 33/34 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 46.79 UG/L | 31/31 | SYR4 | 2014–2019 |
| Trichloroacetic Acid | 33.88 UG/L | 31/31 | SYR4 | 2014–2019 |
| LEAD SUMMARY | 0.0160 mg/L | 26/26 | LCR | 2025 |
| Barium | 27 UG/L | 16/16 | SYR4 | 2012–2019 |
| Fluoride | 570 UG/L | 15/16 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 3.14 UG/L | 8/31 | SYR4 | 2014–2019 |
| Arsenic | 4 UG/L | 2/16 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon and U | 1.4 PCI/L | 2/2 | SYR4 | 2019 |
| Nitrate | 200 UG/L | 2/32 | SYR4 | 2012–2019 |
| Selenium | 2 UG/L | 2/16 | SYR4 | 2012–2019 |
| Chromium | 4 UG/L | 1/16 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 200 UG/L | 1/8 | SYR4 | 2012–2016 |
89 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, TotalBromoformCHLOROBENZENECadmiumCarbofuranCarbon tetrachlorideChlordaneCombined UraniumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDibromoacetic acidDibromochloromethaneDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonobromoacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFHxSPFMBAPFMPAPFNAPFOAPFOSPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene