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Sewage treatment plant, major discharger, Superior, Wisconsin. NPDES permit WI0025593 expired Mar 31, 2024; its limits still apply. Last 12 months: no values over a limit, 136 required values missing, 40 of 88 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 39 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 39 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .7 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | quarterly maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| E. coli | monthly average | report only (#/100mL) | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ 13 ng/L | all year | 001 |
| Coliform, fecal general | weekly geometric mean | ≤ 656 #/100mL | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 400 #/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 5 C] | weekly average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 5 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 60 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 39 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 39 mg/L | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 002 |
| Chlorine, total residual | weekly average | ≤ 38 ug/L | all year | 002 |
| Chlorine, total residual | monthly average | ≤ 38 ug/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 002 |
| Coliform, fecal general | weekly geometric mean | ≤ 972 #/100mL | all year | 002 |
| Coliform, fecal general | geometric mean | ≤ 400 #/100mL | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | weekly average | ≤ 65 mg/L | all year | 003 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 004 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | weekly average | ≤ 65 mg/L | all year | 004 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 004 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 701 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 701 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 701 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 701 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 701 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 701 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 701 |
| Arsenic, total recoverable | quarterly maximum | report only (ug/L) | all year | 701 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 701 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 701 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 701 |
| Mercury, total recoverable | quarterly maximum | report only (ng/L) | all year | 701 |
| BOD, carbonaceous [5 day, 5 C] | monthly average | report only (mg/L) | all year | 701 |
| BOD, carbonaceous [5 day, 5 C] | daily maximum | report only (mg/L) | all year | 701 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 702 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 702 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 702 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 702 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 705 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 705 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 705 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 705 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 705 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 705 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 706 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 706 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 706 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 706 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 706 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 706 |
Cited limits by parameter: Wisconsin's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WI0025593 · MCP: https://passage-data.com/mcp