PFAS in Montana Water
Based on EPA UCMR 5 testing of 28 public water systems in Montana.
See Montana on the national heatmap28
Systems Tested
28
With PFAS Detected
2
Above EPA Limits
7%
Exceed MCL
Most Commonly Detected PFAS in Montana
Systems with detections · EPA UCMR 5 (2023–2025)
lithium 24 systems
PFBS 2 systems
PFOS 2 systems
PFHxS 1 system
PFBA 1 system
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Get specific results for your neighborhood's water utility.
Water Systems in Montana (28)
| Water System ↕ | PWSID | PFAS Detected ↕ | Above MCL ↕ | Risk |
|---|---|---|---|---|
| KALISPELL PUBLIC WORKS Groundwater | MT0000259 | 2 | 1 | High Risk |
| ALPINE VILLAGE WUA Groundwater | MT0003229 | 1 | 1 | High Risk |
| MALMSTROM AIR FORCE BASE Surface Water | MT0000515 | 2 | 0 | Low Level |
| BILLINGS CITY OF Surface Water | MT0000153 | 1 | 0 | Low Level |
| CO WATER DIST OF BILLINGS HEIGHTS Surface Water | MT0000155 | 1 | 0 | Low Level |
| LOCKWOOD WATER AND SEWER DISTRICT Surface Water | MT0000156 | 1 | 0 | Low Level |
| DILLON CITY OF Groundwater | MT0000201 | 1 | 0 | Low Level |
| FAIRFIELD TOWN OF Groundwater | MT0000212 | 1 | 0 | Low Level |
| GLENDIVE CITY OF Surface Water | MT0000229 | 1 | 0 | Low Level |
| HAMILTON CITY OF Groundwater | MT0000234 | 1 | 0 | Low Level |
| HARDIN CITY OF Surface Water | MT0000235 | 1 | 0 | Low Level |
| HELENA WATER SYSTEM Surface Water | MT0000241 | 1 | 0 | Low Level |
| BIGFORK COUNTY WATER AND SEWER Groundwater | MT0000262 | 1 | 0 | Low Level |
| LAUREL MUNICIPAL WATER SYSTEM Surface Water | MT0000270 | 1 | 0 | Low Level |
| MILES CITY CITY OF Surface Water | MT0000291 | 1 | 0 | Low Level |
| MISSOULA WATER Groundwater | MT0000294 | 1 | 0 | Low Level |
| SHELBY CITY OF Groundwater | MT0000328 | 1 | 0 | Low Level |
| SIDNEY CITY OF Groundwater | MT0000330 | 1 | 0 | Low Level |
| HAVRE CITY OF Surface Water | MT0000524 | 1 | 0 | Low Level |
| GREAT FALLS CITY OF Surface Water | MT0000525 | 1 | 0 | Low Level |
| LIVINGSTON CITY OF Groundwater | MT0000573 | 1 | 0 | Low Level |
| BIG SKY COUNTY WATER AND SEWER DIST 363 Groundwater | MT0002385 | 1 | 0 | Low Level |
| PINESDALE TOWN OF Groundwater | MT0002926 | 1 | 0 | Low Level |
| WEST YELLOWSTONE TOWN OF Groundwater | MT0003136 | 1 | 0 | Low Level |
| UNIVERSITY OF MONTANA Groundwater | MT0004204 | 1 | 0 | Low Level |
| MONTANA STATE UNIVERSITY BILLINGS Surface Water | MT0004788 | 1 | 0 | Low Level |
| ROCKY MOUNTAIN COLLEGE Surface Water | MT0004796 | 1 | 0 | Low Level |
| BLACK ROCK ESTATES SUBDIVISION Groundwater | MT0004881 | 1 | 0 | Low Level |
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