CROW AGENCY, 08
WYOLA WATER SYSTEM Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace EPA Region 8’s official records. Always confirm current status with EPA Region 8 before making decisions based on this information.
System facts
- System ID (PWSID)
- 083090014
- System type
- Community Water System
- Population served
- 281
- Service connections
- 64
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Violation history
Follow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
January 1, 2025 – October 16, 2025
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2023 – December 31, 2023
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2023 – December 31, 2023
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2023 – December 31, 2023
ResolvedMonitoring, Regular
—Pentachlorophenol
July 1, 2021 – September 30, 2021
ResolvedMonitoring, Regular
—Nitrate-Nitrite
July 1, 2020 – September 30, 2020
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
April 1, 2020 – April 30, 2020
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
March 1, 2019 – March 31, 2019
ResolvedFailure To Address Deficiency
Health-basedGroundwater Rule
November 2, 2018 – November 16, 2019
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
February 1, 2018 – February 28, 2018
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
October 1, 2017 – October 31, 2017
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Regular
—LASSO
January 1, 2008 – December 31, 2010
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
March 1, 2000 – March 31, 2000
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2025 – October 16, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2024 – December 31, 2024 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2023 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| July 1, 2021 – September 30, 2021 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| July 1, 2020 – September 30, 2020 | Monitoring, Regular | Nitrate-Nitrite | — | Resolved |
| April 1, 2020 – April 30, 2020 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| March 1, 2019 – March 31, 2019 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| November 2, 2018 – November 16, 2019 | Failure To Address Deficiency | Groundwater Rule | Health-based | Resolved |
| February 1, 2018 – February 28, 2018 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| October 1, 2017 – October 31, 2017 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 2008 – December 31, 2010 | Monitoring, Regular | LASSO | — | Resolved |
| March 1, 2000 – March 31, 2000 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- October 16, 2025State Compliance achieved11 linked violations
- January 19, 2021State Compliance achieved24 linked violations
- September 15, 2020State Compliance achieved2 linked violations
- August 17, 2020Federal issued Boil Water Order2 linked violations
- September 11, 2019Federal Final Administrative Order issued19 linked violations
- July 17, 2019Federal issued Boil Water Ordergeneral compliance action — not tied to a specific violation on record
- July 17, 2019Federal SDWA Section 1431 (Emergency) Ordergeneral compliance action — not tied to a specific violation on record
- June 5, 2019Federal issued Boil Water Order2 linked violations
- April 30, 2019State Compliance achieved1 linked violation
- May 9, 2018State Compliance achieved8 linked violations
- June 11, 2010State Compliance achieved6 linked violations
- June 10, 2010State Compliance achieved5 linked violations
- January 1, 2009State Compliance achieved6 linked violations
Contact
STOPS, JR., MARVIN (WES)
406-697-4765
CROW AGENCY, MT 59022