Non-Compliance
Clean Air Act
Clean Water Act
YELLOWSTONE ENERGY POWER PLANT
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
2215 N. FRONTAGE ROAD
BILLINGS, MT 59101
View on map ↗ - County
- YELLOWSTONE County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221118
- Inspections
- 5 · last May 29, 2025
- Total Penalties
- $0 · last Apr 10, 2006
- Registry ID
- 110001474164
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
12
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
8
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| cwa | Schedule Event achieved late but reported | Feb 15, 2024 | — | Open |
| cwa | Schedule Event reported late | Feb 15, 2024 | — | Open |
| cwa | Schedule Event unachieved but reported | Feb 15, 2024 | Mar 25, 2024 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 15, 2024 | Mar 25, 2024 | Resolved |
| cwa | Schedule Event reported late | Feb 15, 2022 | — | Open |
| cwa | Schedule Event achieved late but reported | Feb 15, 2022 | — | Open |
| cwa | Schedule Event reported late | Feb 15, 2021 | — | Open |
| cwa | Schedule Event unachieved but reported | Feb 15, 2021 | Jan 31, 2023 | Resolved |
| cwa | Schedule Event achieved late but reported | Feb 15, 2021 | — | Open |
| cwa | Schedule Event unachieved and not reported | Feb 15, 2021 | Jan 31, 2023 | Resolved |
| cwa | Schedule Event achieved late but reported | Feb 15, 2020 | — | Open |
| cwa | Schedule Event reported late | Feb 15, 2020 | — | Open |
| cwa | Schedule Event unachieved and not reported | Feb 15, 2020 | Jan 31, 2023 | Resolved |
| cwa | Schedule Event unachieved but reported | Feb 15, 2020 | Jan 31, 2023 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 15, 2019 | Jan 31, 2023 | Resolved |
| cwa | Schedule Event reported late | Feb 15, 2019 | — | Open |
| cwa | Schedule Event achieved late but reported | Feb 15, 2019 | — | Open |
| cwa | Schedule Event unachieved but reported | Feb 15, 2019 | Jan 31, 2023 | Resolved |
| caa | FRV | Dec 4, 2017 | — | Open |
| caa | FRV | Sep 27, 2017 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Nov 15, 2016 | Aug 25, 2017 | Resolved |
| cwa | WW Storm Water Non-Construction - Failure to Maintain Records | Aug 3, 2012 | Sep 25, 2012 | Resolved |
| cwa | WW Storm Water Non-Construction - Failure to Conduct Inspections | Aug 3, 2012 | Sep 25, 2012 | Resolved |
| cwa | WW Storm Water Non-Construction - Failure to submit required report (non-DMR) | Aug 3, 2012 | Sep 25, 2012 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 28, 2012 | — | Open |
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Feb 28, 2011 | Apr 29, 2011 | Resolved |
| cwa | Reporting Violations - Late Submittal of DMRs | Feb 28, 2011 | Apr 29, 2011 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Feb 28, 2011 | Apr 29, 2011 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 28, 2009 | — | Open |
| cwa | Schedule Event reported late | Jan 28, 2009 | — | Open |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +918% | Jan 2026 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.13 mg/L | 0.01 | +834% | Jan 2026 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.01 | +582% | Dec 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +611% | Dec 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.01 | +572% | Nov 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.17 mg/L | 0.01 | +1,150% | Nov 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.09 mg/L | 0.01 | +525% | Oct 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.01 | +383% | Oct 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +65% | Sep 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +131% | Sep 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.01 | +362% | Aug 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.01 | +345% | Aug 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.08 mg/L | 0.01 | +460% | Jul 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.01 | +393% | Jul 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.13 mg/L | 0.01 | +1,306% | Jun 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.19 mg/L | 0.01 | +1,286% | Jun 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.01 | +1,054% | May 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.14 mg/L | 0.01 | +906% | May 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.08 mg/L | 0.01 | +756% | Apr 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.36 mg/L | 0.01 | +2,486% | Apr 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.16 mg/L | 0.01 | +1,049% | Mar 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.01 | +1,086% | Mar 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +582% | Feb 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.01 | +624% | Feb 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +970% | Jan 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.14 mg/L | 0.01 | +920% | Jan 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +981% | Dec 2024 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.15 mg/L | 0.01 | +992% | Dec 2024 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.17 mg/L | 0.12 | +43% | Nov 2024 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.54 mg/L | 0.18 | +202% | Nov 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.01 | +635% | Nov 2024 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.12 mg/L | 0.01 | +762% | Nov 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.17 mg/L | 0.01 | +1,121% | Oct 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.09 mg/L | 0.01 | +876% | Oct 2024 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.22 mg/L | 0.01 | +1,495% | Sep 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.09 mg/L | 0.01 | +865% | Sep 2024 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.01 | +173% | Aug 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +36% | May 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.01 | +116% | May 2019 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +36% | Mar 2019 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +8% | Feb 2019 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +65% | Jan 2019 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Notice of Violation
Clean Air Act
· Case 3601452382 · May 22, 2018
Warning Letter
Clean Air Act
· Case 3601332363 · Feb 6, 2018
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