Non-Compliance
Clean Water Act
TOWN OF DARBY WWTF
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
-
101 EAST TANNER AVENUE
DARBY, MT 59829
View on map ↗ - County
- RAVALLI County
- Inspections
- 1 · last Dec 20, 2022
- Total Penalties
- $0
- Registry ID
- 110006723260
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.
11
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 unachieved and not reported | Oct 30, 2025 | Jan 29, 2026 | Resolved |
| cwa | Management Practice Violations - Improper Operation and Maintenance | Dec 20, 2022 | Sep 25, 2023 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Dec 20, 2022 | Sep 25, 2023 | Resolved |
| cwa | Effluent Violations - Numeric effluent violation | Dec 20, 2022 | Sep 25, 2023 | Resolved |
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Oct 25, 2019 | Dec 17, 2019 | Resolved |
| cwa | Management Practice Violations - Failure to Maintain Records | Oct 25, 2019 | Dec 17, 2019 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 28, 2017 | Jan 1, 2018 | Resolved |
| cwa | Schedule Event unachieved and not reported | Feb 28, 2017 | Jan 1, 2018 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 1, 2017 | Jan 1, 2018 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 28, 2015 | Jan 1, 2018 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 28, 2015 | Jan 1, 2018 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Mar 20, 2014 | Jun 2, 2014 | Resolved |
| cwa | Monitoring Violations - Improper Analysis or Lab Error | Mar 20, 2014 | Jun 2, 2014 | Resolved |
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 |
|---|---|---|---|---|---|---|
| Solids, total suspended | DMR, Limited - Numeric Violation | 53.00 mg/L | 45.00 | +18% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 29.10 kg/d | 25.65 | +13% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 37.00 mg/L | 30.00 | +23% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 20.43 kg/d | 17.12 | +19% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 32.00 mg/L | 30.00 | +7% | May 2024 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 144.80 MPN/100mL | 126.00 | +15% | Oct 2023 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 1,732.90 MPN/100mL | 252.00 | +588% | Oct 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 159.48 kg/d | 34.05 | +368% | Oct 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 107.80 kg/d | 17.25 | +525% | Oct 2022 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 270.00 mg/L | 60.00 | +350% | Oct 2022 | Open |
| BOD, carbonaceous, percent removal | DMR, Limited - Overdue | 46.00 % | 65.00 | +54% | Oct 2022 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 620.25 MPN/100mL | 126.00 | +392% | Oct 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 182.50 mg/L | 40.00 | +356% | Oct 2022 | Resolved |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 884.00 MPN/100mL | 252.00 | +251% | Oct 2022 | Open |
| BOD, carbonaceous, percent removal | DMR, Limited - Numeric Violation | 46.00 % | 65.00 | +54% | Oct 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 89.00 mg/L | 60.00 | +48% | May 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 51.00 mg/L | 40.00 | +28% | May 2022 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 162.99 kg/d | 34.05 | +379% | Oct 2021 | Open |
| BOD, carbonaceous, percent removal | DMR, Limited - Numeric Violation | 63.00 % | 65.00 | +6% | Oct 2021 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 82.83 kg/d | 17.25 | +380% | Oct 2021 | Resolved |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 411.00 MPN/100mL | 252.00 | +63% | Oct 2021 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 260.00 mg/L | 60.00 | +333% | Oct 2021 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 132.50 mg/L | 40.00 | +231% | Oct 2021 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 153.50 mg/L | 40.00 | +284% | Sep 2021 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 300.00 mg/L | 60.00 | +400% | Sep 2021 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 96.17 kg/d | 17.25 | +457% | Sep 2021 | Resolved |
| BOD, carbonaceous, percent removal | DMR, Limited - Numeric Violation | 33.00 % | 65.00 | +91% | Sep 2021 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 75.81 kg/d | 61.29 | +24% | May 2021 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 1,732.90 MPN/100mL | 252.00 | +588% | Apr 2021 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 974.04 MPN/100mL | 126.00 | +673% | Apr 2021 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 129.60 MPN/100mL | 126.00 | +3% | Oct 2020 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 479.90 MPN/100mL | 126.00 | +281% | Jun 2020 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 561.00 MPN/100mL | 252.00 | +123% | Jun 2020 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 138.00 mg/L | 40.00 | +245% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 70.77 kg/d | 17.25 | +310% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 180.00 mg/L | 60.00 | +200% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 81.39 kg/d | 34.05 | +139% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 110.05 kg/d | 34.05 | +223% | Nov 2018 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 68.78 kg/d | 17.25 | +299% | Nov 2018 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 125.00 mg/L | 40.00 | +213% | Nov 2018 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 200.00 mg/L | 60.00 | +233% | Nov 2018 | Open |
| BOD, carbonaceous, percent removal | DMR, Limited - Numeric Violation | 62.00 % | 65.00 | +9% | Nov 2018 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 175.50 MPN/100mL | 126.00 | +39% | Oct 2018 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 400.00 MPN/100mL | 252.00 | +99,999% | Oct 2018 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 25.00 % | 65.00 | +114% | Jul 2017 | Open |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 64.00 % | 85.00 | +140% | Jul 2017 | Open |
| E. coli, MTEC-MF | DMR, Limited - Numeric Violation | 1,425.60 MPN/100mL | 252.00 | +466% | Jun 2017 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 33.14 kg/d | 25.88 | +28% | Jun 2017 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 43.88 mg/L | 30.00 | +46% | Jun 2017 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 113.88 mg/L | 45.00 | +153% | Jun 2017 | 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.
State Administrative Order of Consent
Clean Water Act
· Case MT-FID2863 · Sep 25, 2023
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