Montana PFAS compliance
PFAS contamination data for 500 water systems in Montana, serving 1,129,022 people.
Total systems
500
Exceed MCL
1
At risk
0
Compliant
42
Settlement eligible
26
Montana PFAS regulatory overview
State standards
Montana follows federal EPA MCLs (PFOA/PFOS: 4 ppt).
MT follows federal EPA MCLs. PFAS investigation at Malmstrom AFB and other sites.
Regulatory agency
Montana follows federal EPA MCLs. Contamination investigation at Malmstrom AFB and fire training areas.
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Water systems
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| BILLINGS CITY OF MT0000153 | BILLINGS | 114,000 | — | — | Compliant |
| MISSOULA WATER MT0000294 | MISSOULA | 68,200 | — | — | Compliant |
| GREAT FALLS CITY OF MT0000525 | GREAT FALLS | 60,000 | — | — | Compliant |
| BOZEMAN CITY OF MT0000161 | BOZEMAN | 56,000 | — | — | Compliant |
| BUTTE SILVERBOW WATER DEPT MT0000170 | BUTTE | 33,000 | — | — | Compliant |
| HELENA WATER SYSTEM MT0000241 | HELENA | 32,091 | — | — | Compliant |
| KALISPELL PUBLIC WORKS MT0000259 | KALISPELL | 25,000 | — | 6.6 | Exceeds |
| MONTANA STATE UNIVERSITY BOZEMAN MT0004790 | BOZEMAN | 19,200 | — | — | Compliant |
| UNIVERSITY OF MONTANA MT0004204 | MISSOULA | 15,000 | — | — | Compliant |
| CO WATER DIST OF BILLINGS HEIGHTS MT0000155 | BILLINGS | 12,000 | — | — | Compliant |
| BELGRADE CITY OF MT0000136 | BELGRADE | 10,460 | — | — | Compliant |
| WHITEFISH CITY OF MT0000357 | WHITEFISH | 10,418 | — | — | Compliant |
| HAVRE CITY OF MT0000524 | HAVRE | 9,921 | — | — | Compliant |
| WEST YELLOWSTONE TOWN OF MT0003136 | WEST YELLOWSTONE | 9,899 | — | — | Compliant |
| MILES CITY CITY OF MT0000291 | MILES CITY | 9,565 | — | — | Compliant |
| MALMSTROM AIR FORCE BASE MT0000515 | MALMSTROM AIR FORCE BASE | 8,850 | — | — | Compliant |
| FLATHEAD COUNTY WATER AND SEWER MT0001744 | KALISPELL | 7,775 | — | — | Compliant |
| LIVINGSTON CITY OF MT0000573 | LIVINGSTON | 7,500 | — | — | Compliant |
| ANACONDA WATER DEPARTMENT MT0000016 | ANACONDA | 6,750 | — | — | Compliant |
| LAUREL MUNICIPAL WATER SYSTEM MT0000270 | LAUREL | 6,339 | — | — | Compliant |
| BIGFORK COUNTY WATER AND SEWER MT0000262 | BIGFORK | 6,100 | — | — | Compliant |
| LEWISTOWN CITY OF MT0000271 | LEWISTOWN | 5,923 | — | — | Compliant |
| LOCKWOOD WATER AND SEWER DISTRICT MT0000156 | BILLINGS | 5,900 | — | — | Compliant |
| ROCKY MOUNTAIN COLLEGE MT0004796 | BILLINGS | 5,700 | — | — | Compliant |
| HAMILTON CITY OF MT0000234 | HAMILTON | 5,585 | — | — | Compliant |
| POLSON CITY OF MT0000308 | POLSON | 5,300 | — | — | Compliant |
| SIDNEY CITY OF MT0000330 | SIDNEY | 5,000 | — | — | Compliant |
| LIBBY CITY OF MT0000274 | LIBBY | 4,892 | — | — | Compliant |
| GLENDIVE CITY OF MT0000229 | GLENDIVE | 4,873 | — | — | Compliant |
| TOWN OF BROWNING 083090091 | BROWNING | 4,671 | — | — | Compliant |
| COLUMBIA FALLS CITY OF MT0000181 | COLUMBIA FALLS | 4,450 | — | — | Compliant |
| DILLON CITY OF MT0000201 | DILLON | 4,300 | — | — | Compliant |
| RIVER ROCK COUNTY WATER AND SEWER DIST MT0004082 | BELGRADE | 4,200 | — | — | Compliant |
| BIG SKY COUNTY WATER AND SEWER DIST 363 MT0002385 | BIG SKY | 4,132 | — | — | Compliant |
| SHELBY CITY OF MT0000328 | SHELBY | 3,970 | — | — | Compliant |
| HARDIN CITY OF MT0000235 | HARDIN | 3,500 | — | — | Compliant |
| MONTANA STATE UNIVERSITY BILLINGS MT0004788 | BILLINGS | 2,999 | — | — | Compliant |
| SUN PRAIRIE VILLAGE COUNTY MT0000521 | GREAT FALLS | 1,800 | — | — | Compliant |
| CULLIGAN WATER CONDITIONING GREAT FALLS MT0002630 | GREAT FALLS | 900 | — | — | Compliant |
| PHANTOM HILLS WATER SYSTEM MT0004379 | MISSOULA | 810 | — | — | Compliant |
| PINESDALE TOWN OF MT0002926 | PINESDALE | 800 | — | — | Compliant |
| FAIRFIELD TOWN OF MT0000212 | FAIRFIELD | 718 | — | — | Compliant |
| FRENCHTOWN HIGH SCHOOL MT0000856 | FRENCHTOWN | 550 | — | — | Compliant |