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Metal Mining Services, Red Cliff, Colorado. NPDES permit CO0048952 expired Sep 30, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year |
| Chloride [as Cl] | rolling average | report only (mg/L) | all year |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year |
| Cadmium, potentially dissolvd | rolling average | report only (ug/L) | all year |
| Lead, potentially dissolvd | 30-day average | ≤ 4.1 ug/L | all year |
| Lead, potentially dissolvd | daily maximum | ≤ 108 ug/L | all year |
| Lead, potentially dissolvd | rolling average | ≤ 2.4 ug/L | all year |
| Selenium, potentially dissolvd | 30-day average | ≤ 5.8 ug/L | all year |
| Selenium, potentially dissolvd | daily maximum | ≤ 23 ug/L | all year |
| Selenium, potentially dissolvd | rolling average | ≤ 3 ug/L | all year |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .302 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Mercury, total low level | 30-day average | report only (ug/L) | all year |
| Mercury, total low level | rolling average | report only (ug/L) | all year |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year |
| Sulfide-hydrogen sulfide [undissociated] | rolling average | report only (mg/L) | all year |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | 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/CO0048952 · MCP: https://passage-data.com/mcp