Water Quality: Billings, MT
37 water systems • 139,577 people served
Multiple Health ViolationsWater Quality Summary
Billings is served by 37 public water systems with a combined service population of 139,577 people, and has 496 EPA Safe Drinking Water Act violations on record. Critically, 27 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Billings's violation count is 374% above the national average for Montana. Contaminants associated with violations include Chlorine Dioxide, Disinfection Byproducts, Nitrate-Nitrite.
Contaminants Found
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Causes methemoglobinemia in infants and may pose cancer risks with long-term exposure.
Common source: Fertilizer runoff, septic systems, animal feedlots, natural deposits
EPA limit: 10 mg/L (as nitrogen)
Water Systems Serving Billings
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| BILLINGS CITY OF | MT0000153 | Surface Water | 114,000 | 0 |
| CO WATER DIST OF BILLINGS HEIGHTS | MT0000155 | Surface Water | 12,000 | 3 |
| LOCKWOOD WATER AND SEWER DISTRICT | MT0000156 | Surface Water | 5,900 | 1 |
| PIONEER WATER SERVICE | MT0004226 | Surface Water | 900 | 15 |
| FISHER WATER SERVICE | MT0001848 | Surface Water | 750 | 15 |
| CHERRY CREEK ESTATES LLC | MT0004392 | Surface Water | 600 | 29 |
| SUNDANCE SUBDIVISION | MT0005056 | Groundwater | 378 | 0 |
| STONE CREEK SUBDIVISION | MT0005183 | Groundwater | 378 | 0 |
| HIDDEN LAKE YELLOWSTONE COUNTY W AND S D | MT0003374 | Groundwater | 350 | 54 |
| EMERALD VIEW PARK | MT0002996 | Surface Water | 320 | 12 |
| SHILOH ROAD DEVELOPMENT | MT0005178 | Surface Water | 315 | 1 |
| MOUNTAIN MEADOWS ESTATES LLP | MT0001791 | Groundwater | 300 | 4 |
| MOBILE CITY HOME PARK NO 2 | MT0003043 | Groundwater | 300 | 15 |
| PRECISION WATER | MT0004497 | Surface Water | 250 | 6 |
| GRANITE PARK WATER ASSOCIATION | MT0004563 | Groundwater | 250 | 18 |
| YELLOWSTONE BOYS AND GIRLS RANCH | MT0000154 | Groundwater | 240 | 83 |
| WELLS GARDEN ESTATES | MT0002927 | Groundwater | 240 | 11 |
| CRYSTAL SPRINGS WATER SYSTEM | MT0003986 | Groundwater | 225 | 33 |
| THE NINES SUBDIVISION | MT0004989 | Groundwater | 220 | 2 |
| OAK RIDGE ESTATES | MT0004250 | Groundwater | 200 | 11 |
| STILL RIVER ESTATES SUBDIVISION | MT0005118 | Groundwater | 188 | 7 |
| C & C COMMUNITY INC | MT0005017 | Surface Water | 145 | 17 |
| GOLDEN EAGLE WATER USERS ASSN | MT0002840 | Groundwater | 125 | 8 |
| MOBILE CITY HOME PARK NO 1 | MT0000601 | Groundwater | 100 | 13 |
| ALDINGER ACRES SUBDIVISION | MT0003552 | Groundwater | 100 | 9 |
| ERICS EMERGENCY WATER SERVICE | MT0006002 | Surface Water | 100 | 1 |
| PEKS MOBILE HOME COURT | MT0004714 | Surface Water | 95 | 12 |
| WESTANA MOBILE MANOR HAMILTON | MT0000634 | Groundwater | 90 | 1 |
| BLACK ROCK ESTATES SUBDIVISION | MT0004881 | Groundwater | 75 | 30 |
| MIDWAY TOWNHOMES WUA | MT0005065 | Surface Water | 75 | 7 |
| DUCK CREEK MOBILE HOME PARK | MT0001786 | Groundwater | 70 | 40 |
| SKYCREST ESTATES SUBDIVISION | MT0004964 | Groundwater | 65 | 4 |
| BLUE GRASS WATER USERS ASSOCIATION | MT0004093 | Groundwater | 60 | 14 |
| DOUBLE DIAMOND SUBDIVISION ARBOR HILLS | MT0004845 | Surface Water | 50 | 5 |
| SPRUCE PARK MOBILE VILLAGE | MT0000079 | Groundwater | 48 | 10 |
| MOBILE CITY 3 | MT0005088 | Surface Water | 40 | 4 |
| SARTORIE LEGACY HOMES | MT0005129 | Surface Water | 35 | 1 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Montana
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.