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Gold Ores, Gunnison County, Colorado. NPDES permit CO0049023 expired Dec 31, 2022; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Turbidity | quarterly maximum | ≤ 50 NTU (alert, not enforceable) | all year |
| pH | minimum | ≥ 6 SU (alert, not enforceable) | all year |
| pH | maximum | ≤ 9 SU (alert, not enforceable) | all year |
| Solids, total suspended | quarterly maximum | ≤ 100 mg/L (alert, not enforceable) | all year |
| Arsenic, total [as As] | quarterly maximum | ≤ 150 ug/L (alert, not enforceable) | all year |
| Cadmium, total [as Cd] | quarterly maximum | ≤ 1.3 ug/L (alert, not enforceable) | all year |
| Copper, total [as Cu] | quarterly maximum | ≤ 9 ug/L (alert, not enforceable) | all year |
| Iron, total [as Fe] | quarterly maximum | ≤ 1000 ug/L (alert, not enforceable) | all year |
| Lead, total [as Pb] | quarterly maximum | ≤ 45 ug/L (alert, not enforceable) | all year |
| Nickel, total [as Ni] | quarterly maximum | ≤ 320 ug/L (alert, not enforceable) | all year |
| Silver, total [as Ag] | quarterly maximum | ≤ 1.7 ug/L (alert, not enforceable) | all year |
| Zinc, total [as Zn] | quarterly maximum | ≤ 80 ug/L (alert, not enforceable) | all year |
| Selenium, total [as Se] | quarterly maximum | ≤ 5 ug/L (alert, not enforceable) | all year |
| Mercury, total [as Hg] | quarterly maximum | ≤ 1.4 ug/L (alert, not enforceable) | all year |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 30 Metal 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/CO0049023 · MCP: https://passage-data.com/mcp