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Bituminous Coal And Lignite - Surface, Gillette, Wyoming. NPDES permit WY0023761, in force until Mar 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| 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 | daily maximum | ≤ 90 mg/L | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 001 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 001 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 001 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 001 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 001 |
| Duration | monthly total | report only (d/mo) | all year | 001 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Apr–Sep | 001 |
| E. coli | monthly geometric mean | ≤ 630 #/100mL | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 576 #/100mL | Apr–Sep | 001 |
| E. coli | daily maximum | ≤ 630 #/100mL | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 002 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 002 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 002 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 002 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 002 |
| Duration | monthly total | report only (d/mo) | all year | 002 |
| Flow | monthly average | report only (MGD) | all year | 002 |
| Flow | daily maximum | report only (MGD) | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 004 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 004 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 004 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 004 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 004 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 004 |
| Duration | monthly total | report only (d/mo) | all year | 004 |
| Flow | monthly average | report only (MGD) | all year | 004 |
| Flow | daily maximum | report only (MGD) | all year | 004 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 006 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 006 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 006 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 006 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 006 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 006 |
| Duration | monthly total | report only (d/mo) | all year | 006 |
| Flow | monthly average | report only (MGD) | all year | 006 |
| Flow | daily maximum | report only (MGD) | all year | 006 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 007 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 007 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 007 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 007 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 007 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 007 |
| Duration | monthly total | report only (d/mo) | all year | 007 |
| Flow | monthly average | report only (MGD) | all year | 007 |
| Flow | daily maximum | report only (MGD) | all year | 007 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 010 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 010 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 010 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 010 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 010 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 010 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 010 |
| Duration | monthly total | report only (d/mo) | all year | 010 |
| Flow | monthly average | report only (MGD) | all year | 010 |
| Flow | daily maximum | report only (MGD) | all year | 010 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 016 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 016 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 016 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 016 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 016 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 016 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 016 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 016 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 016 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 016 |
| Duration | monthly total | report only (d/mo) | all year | 016 |
| Flow | monthly average | report only (MGD) | all year | 016 |
| Flow | daily maximum | report only (MGD) | all year | 016 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 017 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 017 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 017 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 017 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 017 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 017 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 017 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 017 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 017 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 017 |
| Duration | monthly total | report only (d/mo) | all year | 017 |
| Flow | monthly average | report only (MGD) | all year | 017 |
| Flow | daily maximum | report only (MGD) | all year | 017 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 020 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 020 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 020 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 020 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 020 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 020 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 020 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 020 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 020 |
| Duration | monthly total | report only (d/mo) | all year | 020 |
| Flow | monthly average | report only (MGD) | all year | 020 |
| Flow | daily maximum | report only (MGD) | all year | 020 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 022 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 022 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 022 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 022 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 022 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 022 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 022 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 022 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 022 |
| Duration | monthly total | report only (d/mo) | all year | 022 |
| Flow | monthly average | report only (MGD) | all year | 022 |
| Flow | daily maximum | report only (MGD) | all year | 022 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 023 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 023 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 023 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 023 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 023 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 023 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 023 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 023 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 023 |
| Duration | monthly total | report only (d/mo) | all year | 023 |
| Flow | monthly average | report only (MGD) | all year | 023 |
| Flow | daily maximum | report only (MGD) | all year | 023 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 026 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 026 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 026 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 026 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 026 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 026 |
| Iron, total [as Fe] | weekly average | ≤ 6 mg/L | all year | 026 |
| Iron, total [as Fe] | daily maximum | ≤ 9 mg/L | all year | 026 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 3110 ug/L | all year | 026 |
| Duration | monthly total | report only (d/mo) | all year | 026 |
| Flow | monthly average | report only (MGD) | all year | 026 |
| Flow | daily maximum | report only (MGD) | all year | 026 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 031 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 031 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 031 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 031 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 031 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 031 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 031 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 031 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 031 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 031 |
| Duration | monthly total | report only (d/mo) | all year | 031 |
| Flow | monthly average | report only (MGD) | all year | 031 |
| Flow | daily maximum | report only (MGD) | all year | 031 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 032 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 032 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 032 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 032 |
| Solids, settleable | instantaneous maximum | ≤ .5 mL/L | all year | 032 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 032 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 032 |
| Iron, total [as Fe] | instantaneous maximum | ≤ 9 mg/L | all year | 032 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 200 ug/L | all year | 032 |
| Manganese, dissolved [as Mn] | instantaneous maximum | ≤ 292 ug/L | all year | 032 |
| Duration | monthly total | report only (d/mo) | all year | 032 |
| Flow | monthly average | report only (MGD) | all year | 032 |
| Flow | daily maximum | report only (MGD) | all year | 032 |
Cited limits by parameter: Wyoming's rules and the federal ones.
Same industry: the 15 Coal Mining permits in Wyoming.
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Your permit document is the final word. As JSON: /api/v1/permits/WY0023761 · MCP: https://passage-data.com/mcp