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Gold Ores, major discharger, Teller County, Colorado. NPDES permit CO0043648 expired Oct 31, 2017; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Cyanide, weak acid, dissociable | 30-day average | report only (ug/L) | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 20 ug/L | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 5 ug/L | all year | 001 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Aluminum, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Aluminum, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 6.2 ug/L | all year | 001 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 1.2 ug/L | all year | 001 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | ≤ 4.6 ug/L | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 1 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 005 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 20 ug/L | all year | 005 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 5 ug/L | all year | 005 |
| Copper, total [as Cu] | 30-day average | ≤ 150 ug/L | all year | 005 |
| Copper, total [as Cu] | daily maximum | ≤ 300 ug/L | all year | 005 |
| Lead, total [as Pb] | 30-day average | ≤ 300 ug/L | all year | 005 |
| Lead, total [as Pb] | daily maximum | ≤ 600 ug/L | all year | 005 |
| Zinc, total [as Zn] | 30-day average | ≤ 750 ug/L | all year | 005 |
| Zinc, total [as Zn] | daily maximum | ≤ 1500 ug/L | all year | 005 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 005 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 005 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 005 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 005 |
| Aluminum, potentially dissolvd | 30-day average | report only (ug/L) | all year | 005 |
| Aluminum, potentially dissolvd | daily maximum | report only (ug/L) | all year | 005 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 6.2 ug/L | all year | 005 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 1.2 ug/L | all year | 005 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 005 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 005 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 005 |
| Selenium, potentially dissolvd | 30-day average | ≤ 4.6 ug/L | all year | 005 |
| Oil and grease | instantaneous maximum | ≤ 10 ug/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 | daily maximum | report only (MGD) | all year | 005 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year | 005 |
| Mercury, total [as Hg] | 30-day average | ≤ 1 ug/L | all year | 005 |
| Mercury, total [as Hg] | daily maximum | ≤ 2 ug/L | all year | 005 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 005 |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 30 Metal Mining permits in Colorado.
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