Non-Compliance
Clean Water Act
BISON RANCH WWTP
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
-
2269 HIGHWAY 260
OVERGAARD, AZ 85928
View on map ↗ - County
- NAVAJO County
- Inspections
- 1 · last Apr 8, 2025
- Total Penalties
- $0
- Registry ID
- 110070112295
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.
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 | Effluent Violations - Numeric effluent violation | Feb 2, 2026 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Sep 24, 2024 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Aug 10, 2022 | — | Open |
| cwa | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | Sep 28, 2020 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Sep 28, 2020 | — | Open |
| cwa | Reporting Violations - Failure to Notify | Sep 28, 2020 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Feb 15, 2019 | — | 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 | 0.01 kg/d | 0.01 | +6% | Dec 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.02 | +159% | Dec 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.01 | +418% | Dec 2025 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.00 kg/d | 0.00 | +33% | Dec 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,300,000.00 mg/L | 1,000,000.00 | +30% | Sep 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5,400,000.00 mg/L | 1,000,000.00 | +440% | Jul 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5,400,000.00 mg/L | 2,000,000.00 | +170% | Jul 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,240,000.00 mg/L | 2,000,000.00 | +212% | Jun 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,240,000.00 mg/L | 1,000,000.00 | +524% | Jun 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.02 | +21% | Dec 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2,240,000.00 mg/L | 2,000,000.00 | +12% | Jul 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2,240,000.00 mg/L | 1,000,000.00 | +124% | Jul 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +114% | Jun 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.02 | +7% | Jun 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,120,000.00 mg/L | 1,000,000.00 | +12% | Apr 2023 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +67% | Jun 2022 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.03 | +54% | Jun 2020 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,250,000.00 mg/L | 1,000,000.00 | +25% | Feb 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,250,000.00 mg/L | 1,000,000.00 | +25% | Feb 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 79.00 mg/L | 30.00 | +163% | Jan 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 112.00 mg/L | 45.00 | +149% | Jan 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,830,000.00 mg/L | 1,000,000.00 | +83% | Jan 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,300,000.00 mg/L | 1,000,000.00 | +30% | Jan 2019 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 36.00 mg/L | 30.00 | +20% | Dec 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,690,000.00 mg/L | 1,000,000.00 | +569% | Dec 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,690,000.00 mg/L | 1,000,000.00 | +569% | Dec 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,480,000.00 mg/L | 1,000,000.00 | +548% | Jul 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6,480,000.00 mg/L | 1,000,000.00 | +548% | Jul 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9,150,000.00 mg/L | 1,000,000.00 | +815% | Jun 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9,150,000.00 mg/L | 1,000,000.00 | +815% | Jun 2018 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 131.00 mg/L | 45.00 | +191% | May 2018 | Open |
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 72.00 mg/L | 30.00 | +140% | May 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,160,000.00 mg/L | 1,000,000.00 | +16% | Feb 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1,160,000.00 mg/L | 1,000,000.00 | +16% | Feb 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9,290,000.00 mg/L | 1,000,000.00 | +829% | Oct 2017 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9,290,000.00 mg/L | 1,000,000.00 | +829% | Oct 2017 | Open |
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