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Sewage treatment plant, Marion, Wisconsin. NPDES permit WI0020770 expired Jun 30, 2023; its limits still apply. Last 12 months: over a limit 2 times (last January 2026), 64 required values missing, 6 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 9.51 | ≤ 5.2 mg/L | 83% |
| January 2026 | Nitrogen, ammonia total [as N], weekly average | < 8.43 | ≤ 5.2 mg/L | 62% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 7 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 11 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 18 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 11 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 18 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 36 lb/d | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 59 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | weekly average | ≤ 11 mg/L | May–Oct | 003 |
| Solids, total suspended | weekly average | ≤ 18 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 11 mg/L | May–Oct | 003 |
| Solids, total suspended | monthly average | ≤ 18 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 5.2 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.2 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.2 mg/L | all year | 003 |
| Phosphorus, total [as P] | monthly average | ≤ 2.3 mg/L | all year | 003 |
| Chloride [as Cl] | weekly average | ≤ 1100 mg/L | Jan, Feb, Jul, Aug, Sep | 003 |
| Chloride [as Cl] | weekly average | ≤ 1200 mg/L | Jun, Oct | 003 |
| Chloride [as Cl] | weekly average | ≤ 1200 mg/L | Nov | 003 |
| Chloride [as Cl] | weekly average | ≤ 1100 mg/L | Dec | 003 |
| Chloride [as Cl] | weekly average | ≤ 1100 mg/L | Mar | 003 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Jan, Feb, Jul, Aug, Sep | 003 |
| Chloride [as Cl] | monthly average | ≤ 1200 mg/L | Jun, Oct | 003 |
| Chloride [as Cl] | monthly average | ≤ 1200 mg/L | Nov | 003 |
| Chloride [as Cl] | monthly average | ≤ 1100 mg/L | Dec | 003 |
| Chloride [as Cl] | monthly average | ≤ 1100 mg/L | Mar | 003 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Apr, May | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Jan, Feb, Jul, Aug, Sep | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Jun, Oct | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Nov | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar | 003 |
| Chloride [as Cl] | daily maximum | ≤ 1500 mg/L | Apr, May | 003 |
| Chloride [as Cl] | monthly average | report only (lb/d) | Jan, Feb, Jul, Aug, Sep | 003 |
| Chloride [as Cl] | weekly average | ≤ 3900 lb/d | Jun, Oct | 003 |
| Chloride [as Cl] | weekly average | ≤ 4100 lb/d | Nov | 003 |
| Chloride [as Cl] | weekly average | ≤ 3800 lb/d | Dec | 003 |
| Chloride [as Cl] | weekly average | ≤ 3700 lb/d | Mar | 003 |
| Chloride [as Cl] | monthly average | report only (lb/d) | Apr, May | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Jan, Feb, Jul, Aug, Sep | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Jun, Oct | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Nov | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Dec | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Mar | 003 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Apr, May | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Coliform, fecal general | weekly geometric mean | ≤ 656 #/100mL | May–Sep | 003 |
| Coliform, fecal general | geometric mean | ≤ 400 #/100mL | May–Sep | 003 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 703 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 703 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 703 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 703 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 703 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 703 |
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/WI0020770 · MCP: https://passage-data.com/mcp