SILVERTHORNE TOWN OF
CO · PWS ID CO0159095 · Community water system
107
contaminants tested
25
detected
8,400
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0059 ug/L | 3/8 | 2025 |
| PFHxS | 0.0037 ug/L | 2/8 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 1200 UG/L | 64/64 | SYR4 | 2012–2019 |
| Fluoride | 850 UG/L | 43/43 | SYR4 | 2012–2018 |
| LEAD SUMMARY | 0.0053 mg/L | 20/20 | LCR | 2025 |
| Barium | 145 UG/L | 18/18 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1200 UG/L | 12/12 | SYR4 | 2013–2015 |
| TTHM | 16.6 UG/L | 12/13 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 3.7 UG/L | 12/13 | SYR4 | 2012–2019 |
| lithium | 25 ug/L | 8/8 | UCMR-5 | 2025 |
| Dibromochloromethane | 5.9 UG/L | 7/11 | SYR4 | 2013–2019 |
| Bromodichloromethane | 4.2 UG/L | 6/11 | SYR4 | 2013–2019 |
| Bromoform | 2.1 UG/L | 6/11 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 1.9 UG/L | 6/7 | SYR4 | 2015–2019 |
| Gross Alpha, Excl. Radon and U | 3.4 PCI/L | 6/7 | SYR4 | 2013–2015 |
| Chromium | 1 UG/L | 5/18 | SYR4 | 2012–2019 |
| Combined Uranium | 1.4 UG/L | 5/7 | SYR4 | 2013–2015 |
| Chloroform | 2 UG/L | 4/11 | SYR4 | 2013–2019 |
| Combined Radium (-226 and -228) | 0.4000 PCI/L | 3/4 | SYR4 | 2013 |
| Di(2-ethylhexyl) phthalate | 0.8000 UG/L | 3/32 | SYR4 | 2013–2019 |
| Selenium | 2 UG/L | 3/18 | SYR4 | 2012–2019 |
| Xylenes, Total | 2.6 UG/L | 3/20 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 2 UG/L | 2/7 | SYR4 | 2015–2019 |
| Mercury | 0.1200 UG/L | 2/18 | SYR4 | 2012–2019 |
| Cadmium | 0.2100 UG/L | 1/18 | SYR4 | 2012–2019 |
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-PF3OUdS2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalArsenicAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFMBAPFMPAPFNAPFOAPFOSPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl chloridecis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene