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Electric Services, Hermantown, Minnesota. NPDES permit MN0046256 expired Aug 31, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Nitrogen, total [as N] | annual average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | annual average | report only (mg/L) | all year |
| Zinc, total [as Zn] | quarterly average | ≤ .388 mg/L | all year |
| Flow, in conduit or thru treatment plant | quarterly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | quarterly total | report only (Mgal/mo) | all year |
| Duration of discharge | quarterly total | report only (d) | all year |
Cited limits by parameter: Minnesota's rules and the federal ones.
Same industry: the 12 Electric Services permits in Minnesota.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MN0046256 · MCP: https://passage-data.com/mcp