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Porcelain Electrical Supplies, Golden, Colorado. NPDES permit CO0044890 expired Jul 31, 2023; its limits still apply. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Flow, in conduit or thru treatment plant, 30-day average | 2.61585 MGD | ≤ 1 MGD | 162% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 10 SU | all year |
| Cyanide, total [as CN] | 30-day average | report only (ug/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year |
| Cadmium, total [as Cd] | 30-day geometric mean | report only (ug/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year |
| Chromium, total [as Cr] | 30-day average | report only (ug/L) | all year |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year |
| Copper, total [as Cu] | 30-day average | report only (ug/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year |
| Lead, total [as Pb] | 30-day average | report only (ug/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year |
| Molybdenum, total [as Mo] | 30-day average | report only (ug/L) | all year |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year |
| Nickel, total [as Ni] | 30-day average | report only (ug/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year |
| Silver, total [as Ag] | 30-day average | report only (ug/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year |
| Zinc, total [as Zn] | 30-day average | report only (ug/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year |
| Selenium, total [as Se] | 30-day average | report only (ug/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year |
| Total phenols | 30-day geometric mean | report only (ug/L) | all year |
| Total phenols | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 1 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 3 Stone, Clay, Glass and Concrete Products 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/CO0044890 · MCP: https://passage-data.com/mcp