EPA public water records · 30111
Yellowstone County, Montana
Find listed community water systems and their documented follow-up in federal fiscal 2026Q3.
- Systems with linked histories
- 49
- Systems with unresolved health-based records
- 1
- Of those, systems with a formally addressed health-based record
- 0
These counts cover the linked records shown here. A county listing can cover only part of the county or reflect a mailing location.
Find your water system
- ALDINGER ACRES SUBDIVISIONMT0003552 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- ARROW CREEK TRAILER COURTMT0004507 · Montana · 37 violation records · 0 unresolved health-based in this snapshot
- BILLINGS HEIGHTS CO WATER DIST OFMT0000155 · Montana · 4 violation records · 0 unresolved health-based in this snapshot
- BLACK ROCK ESTATES SUBDIVISIONMT0004881 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- BLUE GRASS WATER USERS ASSOCIATIONMT0004093 · Montana · 5 violation records · 0 unresolved health-based in this snapshot
- BROADVIEW TOWN OFMT0000167 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- C & C COMMUNITY INCMT0005017 · Montana · 9 violation records · 0 unresolved health-based in this snapshot
- CHERRY CREEK ESTATES LLCMT0004392 · Montana · 8 violation records · 0 unresolved health-based in this snapshot
- CRYSTAL SPRINGS WATER SYSTEMMT0003986 · Montana · 6 violation records · 0 unresolved health-based in this snapshot
- DOUBLE DIAMOND SUBDIVISION ARBOR HILLSMT0004845 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- DUCK CREEK MOBILE HOME PARKMT0001786 · Montana · 12 violation records · 0 unresolved health-based in this snapshot
- EASTWOOD MOBILE HOME COURTMT0005147 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- EMERALD VIEW PARKMT0002996 · Montana · 6 violation records · 0 unresolved health-based in this snapshot
- ESTATES AT YELLOWSTONE LLCMT0000464 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- FISHER WATER SERVICEMT0001848 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- GO 2 U WATER DELIVERYMT0004754 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- GOLDEN EAGLE WATER USERS ASSNMT0002840 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- GOLDEN MEADOWS SUBDIVISIONMT0005141 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- GOLDEN MEADOWS SUBDIVISION 2ND CCMT0005186 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- GRANITE PARK WATER ASSOCIATIONMT0004563 · Montana · 5 violation records · 0 unresolved health-based in this snapshot
- HIDDEN LAKE YELLOWSTONE COUNTY W AND S DMT0003374 · Montana · 24 violation records · 0 unresolved health-based in this snapshot
- HILLSIDE VILLAGEMT0003808 · Montana · 7 violation records · 0 unresolved health-based in this snapshot
- HUNTLEY YELLOWSTONE CO WATER AND SEWERMT0000254 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- LAUREL MUNICIPAL WATER SYSTEMMT0000270 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- MCCANN'S WATER SERVICE LLCMT0004705 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- MIDWAY TOWNHOMES WUAMT0005065 · Montana · 4 violation records · 0 unresolved health-based in this snapshot
- MITCHELL COURT APARTMENTSMT0005190 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- MOUNTAIN VIEW COLONYMT0004058 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- OAK RIDGE ESTATESMT0004250 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- PEKS MOBILE HOME COURTMT0004714 · Montana · 6 violation records · 0 unresolved health-based in this snapshot
- PIONEER WATER SERVICEMT0004226 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- PRECISION WATERMT0004497 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- PRYOR CREEK WATER ASSNMT0002956 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- RIDGEVIEW SUBDIVISION PHASE ONEMT0005232 · Montana · 6 violation records · 0 unresolved health-based in this snapshot
- RIVER GROVE ESTATES TR CTMT0000123 · Montana · 7 violation records · 0 unresolved health-based in this snapshot
- SADDLEBACK RIDGE ESTATESMT0004408 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- SARTORIE LEGACY HOMESMT0005129 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- SHEPHERD WATER STATIONMT0004920 · Montana · 9 violation records · 0 unresolved health-based in this snapshot
- SHILOH ROAD DEVELOPMENTMT0005178 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- SILVER CREEK CONDOMINIUMS IN YELLOWSTONEMT0005222 · Montana · 1 violation records · 0 unresolved health-based in this snapshot
- SKYCREST ESTATES SUBDIVISIONMT0004964 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- STILL RIVER ESTATES SUBDIVISIONMT0005118 · Montana · 26 violation records · 0 unresolved health-based in this snapshot
- SUNHAVEN MOBILE HOME PARKMT0004147 · Montana · 4 violation records · 0 unresolved health-based in this snapshot
- THE NINES SUBDIVISIONMT0004989 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- WATER DROP LLCMT0006002 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- WELLS GARDEN ESTATESMT0002927 · Montana · 2 violation records · 0 unresolved health-based in this snapshot
- WINDSOR ESTATESMT0003807 · Montana · 3 violation records · 0 unresolved health-based in this snapshot
- WORDEN BALLANTINE YELLOWSTONEMT0000022 · Montana · 10 violation records · 1 unresolved health-based in this snapshot
- YELLOWSTONE BOYS AND GIRLS RANCHMT0000154 · Montana · 22 violation records · 0 unresolved health-based in this snapshot
EPA data and scope
How to read the records
The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.
- We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
- EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
- Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
- We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.
EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility