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Sewage treatment plant, (Unknown City), Wyoming. NPDES permit WY0022896, in force until Apr 30, 2030. Last 12 months: over a limit 13 times (last July 2026), 4 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Nitrogen, ammonia total [as N], monthly average | 26.6 mg/L | ≤ 21.8 mg/L | 22% |
| January 2026 | BOD, 5-day, 20 deg. C, monthly average | 92 mg/L | ≤ 30 mg/L | 207% |
| January 2026 | BOD, 5-day, 20 deg. C, weekly average | 92 mg/L | ≤ 45 mg/L | 104% |
| January 2026 | Nitrogen, ammonia total [as N], monthly average | 26.9 mg/L | ≤ 21.8 mg/L | 23% |
| February 2026 | BOD, 5-day, 20 deg. C, monthly average | 90 mg/L | ≤ 30 mg/L | 200% |
| February 2026 | BOD, 5-day, 20 deg. C, weekly average | 90 mg/L | ≤ 45 mg/L | 100% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 30.2 mg/L | ≤ 21.8 mg/L | 39% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 89 mg/L | ≤ 30 mg/L | 197% |
| March 2026 | BOD, 5-day, 20 deg. C, weekly average | 89 mg/L | ≤ 45 mg/L | 98% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 29 mg/L | ≤ 21.8 mg/L | 33% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 14.2 mg/L | ≤ 10.8 mg/L | 31% |
| July 2026 | E. coli, daily maximum | 2420 MPN/100mL | ≤ 235 MPN/100mL | 930% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 13.1 mg/L | ≤ 10.8 mg/L | 21% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10.8 mg/L | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10.8 mg/L | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 21.8 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 21.8 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Duration | monthly total | report only (d) | all year | 001 |
| Duration | monthly total | report only (d) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .07 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .07 mg/L | all year | 001 |
| E. coli | monthly geometric mean | ≤ 126 MPN/100mL | May–Sep | 001 |
| E. coli | monthly geometric mean | ≤ 126 MPN/100mL | May–Sep | 001 |
| E. coli | monthly geometric mean | ≤ 630 MPN/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli | monthly geometric mean | ≤ 630 MPN/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 235 MPN/100mL | May–Sep | 001 |
| E. coli | daily maximum | ≤ 235 MPN/100mL | May–Sep | 001 |
| E. coli | daily maximum | ≤ 630 MPN/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 630 MPN/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 1 ton/d | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 1 ton/d | all year | 001 |
| Flow | maximum monthly average | ≤ .55 MGD | all year | 001 |
| Flow | maximum monthly average | ≤ .55 MGD | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | report only (%) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | report only (%) | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | report only (%) | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | report only (%) | all year | 001 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | CRS1 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | CRS1 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | CRS1 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | CRS1 |
| Temperature, water deg. centigrade | daily average | report only (deg C) | all year | DMP1 |
| Temperature, water deg. centigrade | daily average | report only (deg C) | all year | DMP1 |
| pH | instantaneous minimum | report only (SU) | all year | DMP1 |
| pH | instantaneous minimum | report only (SU) | all year | DMP1 |
| pH | instantaneous maximum | report only (SU) | all year | DMP1 |
| pH | instantaneous maximum | report only (SU) | all year | DMP1 |
Cited limits by parameter: Wyoming's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WY0022896 · MCP: https://passage-data.com/mcp