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Lead And Zinc Ores, major discharger, Crested Butte, Colorado. NPDES permit CO0035394 expired Aug 31, 2013; its limits still apply. Last 12 months: no values over a limit, 2 of 34 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | Jul–Sep | 001 |
| pH | maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| pH | maximum | ≤ 9 SU | Jul–Sep | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Mar, Jun, Dec | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Sep | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | Mar, Jun, Dec | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | Sep | 001 |
| Arsenic, total [as As] | 30-day average | report only (mg/L) | Mar, Jun, Dec | 001 |
| Arsenic, total [as As] | 30-day average | report only (mg/L) | Sep | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Mar, Jun, Dec | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Sep | 001 |
| Aluminum, total recoverable | 30-day average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Aluminum, total recoverable | 30-day average | report only (ug/L) | Jul–Sep | 001 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Jul–Sep | 001 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Dec | 001 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | Sep | 001 |
| Zinc, potentially dissolved | daily maximum | ≤ 390 ug/L | Mar, Jun, Dec | 001 |
| Zinc, potentially dissolved | daily maximum | ≤ 390 ug/L | Sep | 001 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Dec | 001 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | Sep | 001 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Dec | 001 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | Sep | 001 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | Jul–Sep | 001 |
| Cadmium, potentially dissolvd | daily maximum | ≤ 1.9 ug/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Cadmium, potentially dissolvd | daily maximum | ≤ 1.9 ug/L | Jul–Sep | 001 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Dec | 001 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | Sep | 001 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Dec | 001 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | Sep | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | Jul–Sep | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .675 MGD | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .75 MGD | Jul–Sep | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jul–Sep | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Sep | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Mar, Jun, Dec | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | report only (tox chronic) | Sep | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | Mar, Jun, Dec | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | Sep | 001 |
| Solids, total dissolved | instantaneous maximum | report only (mg/L) | Mar, Jun, Dec | 001 |
| Solids, total dissolved | instantaneous maximum | report only (mg/L) | Sep | 001 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | Mar, Jun, Dec | 001 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | Sep | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | Mar, Jun, Dec | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | Sep | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Mar, Jun, Dec | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | Sep | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (%) | Sep | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (%) | Sep | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (%) | Sep | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 48 % | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 43 % | Sep | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | single sample | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | single sample | report only (%) | Sep | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | single sample | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | single sample | report only (%) | Sep | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | minimum value | report only (%) | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | minimum value | report only (%) | Sep | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | minimum value | ≥ 48 % | Mar, Jun, Dec | 001 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | minimum value | ≥ 43 % | Sep | 001 |
| pH | minimum | report only (SU) | Mar, Jun, Sep, Dec | MON |
| pH | minimum | report only (SU) | Mar, Jun, Sep, Dec | MON |
| pH | maximum | report only (SU) | Mar, Jun, Sep, Dec | MON |
| pH | maximum | report only (SU) | Mar, Jun, Sep, Dec | MON |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | MON |
| Iron, total recoverable | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Iron, total recoverable | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | MON |
| Iron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Iron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Aluminum, total recoverable | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Aluminum, total recoverable | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | MON |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | MON |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 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) | Mar, Jun, Sep, Dec | MON |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | Mar, Jun, Sep, Dec | MON |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | 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] | 30-day average | 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] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | MON |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 30 Metal Mining permits in Colorado.
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Your permit document is the final word. As JSON: /api/v1/permits/CO0035394 · MCP: https://passage-data.com/mcp