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Bituminous Coal - Underground, major discharger, Routt County, Colorado. NPDES permit CO0027154 expired Aug 31, 2012; its limits still apply. Last 12 months: over a limit 2 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | Solids, total suspended, daily maximum | 83 mg/L | ≤ 70 mg/L | 19% |
| April 2026 | Solids, total suspended, 30-day average | 40 mg/L | ≤ 35 mg/L | 14% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 002 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 002 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 002 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 002 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 002 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 002 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 002 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 002 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 002 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 003 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 003 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 003 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 003 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 003 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 003 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 003 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 003 |
| Iron, total recoverable | 30-day average | ≤ 1000 ug/L | all year | 003 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | Mar, Jun, Sep, Dec | 003 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | Mar, Jun, Sep, Dec | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 003 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | 003 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 003 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 003 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, potentially dissolved | 30-day average | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Copper, potentially dissolved | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 003 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 4.55 MGD | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 003 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 003 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 003 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Mar, Jun, Sep, Dec | 003 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Mar, Jun, Sep, Dec | 003 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 003 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 004 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 004 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 004 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 004 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 004 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 004 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 004 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 004 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 004 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 004 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 004 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 004 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 004 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 004 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 004 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 005 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 005 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 005 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 005 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 005 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 005 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 005 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 005 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 005 |
| Iron, total recoverable | 30-day average | ≤ 1000 ug/L | all year | 005 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 005 |
| Iron, total [as Fe] | quarterly average | ≤ 3500 mg/L | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 005 |
| Iron, total [as Fe] | quarterly maximum | ≤ 7000 mg/L | all year | 005 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 005 |
| Iron, total [as Fe] | quarterly average | report only (ug/L) | all year | 005 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 005 |
| Iron, total [as Fe] | quarterly maximum | report only (ug/L) | all year | 005 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | 005 |
| Copper, potentially dissolved | quarterly average | report only (ug/L) | all year | 005 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 005 |
| Copper, potentially dissolved | quarterly maximum | report only (ug/L) | all year | 005 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 005 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 4.55 MGD | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 005 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 005 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 005 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 005 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 005 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 005 |
| LC50 Static Renewal 48Hr Acute Daphnia magna | minimum value | ≥ 100 % | all year | 005 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 006 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 006 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 006 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 006 |
| pH | minimum | ≥ 6.5 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 006 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 006 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 006 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 006 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 006 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 006 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 006 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 006 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 006 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 006 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 006 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 006 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 007 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 007 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 007 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Solids, settleable | 30-day average | report only (mL/L) | Mar, Jun, Sep, Dec | 007 |
| Solids, settleable | quarterly average | report only (mL/L) | all year | 007 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | Mar, Jun, Sep, Dec | 007 |
| Solids, settleable | quarterly maximum | report only (mL/L) | all year | 007 |
| Solids, settleable | 30-day average | report only (mL/L) | Mar, Jun, Sep, Dec | 007 |
| Solids, settleable | quarterly average | report only (mL/L) | all year | 007 |
| Solids, settleable | daily maximum | report only (mL/L) | Mar, Jun, Sep, Dec | 007 |
| Solids, settleable | quarterly maximum | report only (mL/L) | all year | 007 |
| Iron, total recoverable | 30-day average | ≤ 1000 ug/L | all year | 007 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 007 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | Mar, Jun, Sep, Dec | 007 |
| Iron, total [as Fe] | quarterly average | report only (ug/L) | all year | 007 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | Mar, Jun, Sep, Dec | 007 |
| Iron, total [as Fe] | quarterly maximum | report only (ug/L) | all year | 007 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | 007 |
| Iron, total [as Fe] | quarterly average | report only (ug/L) | all year | 007 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 007 |
| Iron, total [as Fe] | quarterly maximum | report only (ug/L) | all year | 007 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 007 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 007 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 2.97 MGD | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 007 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 007 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 007 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Mar, Jun, Sep, Dec | 007 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 007 |
| LC50 Static Renewal 48Hr Acute Daphnia magna | minimum value | ≥ 100 % | all year | 007 |
| Conductivity | quarterly average | report only (umho/cm) | Mar, Jun, Sep, Dec | 008 |
| Conductivity | quarterly average | report only (umho/cm) | all year | 008 |
| Conductivity | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | 008 |
| Conductivity | quarterly maximum | report only (umho/cm) | all year | 008 |
| pH | minimum | ≥ 6.5 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | 30-day average | ≤ 35 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 008 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 008 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 008 |
| Solids, settleable | 30-day average | report only (mL/L) | all year | 008 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 008 |
| Iron, total [as Fe] | 30-day average | ≤ 3500 ug/L | all year | 008 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 008 |
| Iron, total [as Fe] | 30-day average | report only (ug/L) | all year | 008 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 008 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 008 |
| Solids, total dissolved | quarterly average | report only (mg/L) | all year | 008 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 008 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | all year | 008 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 008 |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | all year | MON |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | all year | MON |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | MON |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | MON |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | MON |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | MON |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | MON |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | MON |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Mercury, total [as Hg] | quarterly average | report only (ug/L) | all year | MON |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Mercury, total [as Hg] | quarterly maximum | report only (ug/L) | all year | MON |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 19 Coal Mining permits in Colorado.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CO0027154 · MCP: https://passage-data.com/mcp