BIG SKY COUNTY WATER AND SEWER DIST 363
MT · PWS ID MT0002385 · Community water system
97
contaminants tested
13
detected
4,132
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0031 ug/L | 1/4 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate-Nitrite | 5250 UG/L | 68/82 | SYR4 | 2012–2019 |
| COPPER, FREE | 352 UG/L | 58/61 | SYR4 | 2013–2019 |
| Lead | 137 UG/L | 28/61 | SYR4 | 2013–2019 |
| LEAD SUMMARY | 0.0220 mg/L | 20/20 | LCR | 2025 |
| Arsenic | 23 UG/L | 8/15 | SYR4 | 2013–2019 |
| Fluoride | 800 UG/L | 7/8 | SYR4 | 2013–2019 |
| Gross Alpha, Excl. Radon and U | 6.4 PCI/L | 5/5 | SYR4 | 2013 |
| Barium | 210 UG/L | 3/8 | SYR4 | 2013–2019 |
| Antimony, Total | 3 UG/L | 2/14 | SYR4 | 2013–2019 |
| Combined Uranium | 1 UG/L | 1/5 | SYR4 | 2013 |
| Selenium | 2 UG/L | 1/8 | SYR4 | 2013–2019 |
| Xylenes, Total | 1.1 UG/L | 1/16 | SYR4 | 2013–2019 |
84 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalBromodichloromethaneBromoformCHLOROBENZENECadmiumCarbofuranCarbon tetrachlorideChlordaneChloroformChromiumCombined Radium (-226 and -228)DICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDibromochloromethaneDinosebEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFBAPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFHxSPFMBAPFMPAPFNAPFOAPFOSPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl chloridecis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
BIG SKY