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Sewage treatment plant, major discharger, Grand Rapids, Minnesota. NPDES permit MN0022080 expired Jan 31, 2025; its limits still apply. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 29 | ≤ 25 mg/L | 16% |
| January 2026 | BOD, carbonaceous [5 day, 20 C], maximum weekly average | 43 | ≤ 40 mg/L | 8% |
| August 2026 | Coliform, fecal MPN + membrane ftl 44.5 C, monthly geometric mean | 206 | ≤ 200 #/100mL | 3% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | report only (mg/L) | all year | D048 |
| pH | monthly minimum | ≥ 6 SU | all year | D048 |
| pH | monthly maximum | ≤ 9 SU | all year | D048 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | D048 |
| Solids, total suspended | monthly maximum | report only (mg/L) | May, Sep | D048 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | D048 |
| Solids, total suspended | monthly average | ≤ 1726 kg/d | all year | D048 |
| Solids, total suspended | maximum weekly average | ≤ 2589 kg/d | all year | D048 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D048 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8 mg/L | Jun–Sep | D048 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D048 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 460 kg/d | Jun–Sep | D048 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D048 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D048 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | D048 |
| Phosphorus, total [as P] | monthly average | report only (kg/d) | all year | D048 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | D048 |
| Zinc, total [as Zn] | monthly maximum | ≤ 418 ug/L | all year | D048 |
| Coliform, fecal MPN + membrane ftl 44.5 C | monthly geometric mean | ≤ 200 #/100mL | Apr–Oct | D048 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D048 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D048 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D048 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | D048 |
| Solids, total dissolved | monthly average | report only (mg/L) | Mar, Sep | D048 |
| Mercury, dissolved [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D048 |
| Mercury, total [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D048 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | D048 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | all year | D048 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1438 kg/d | all year | D048 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 2301 kg/d | all year | D048 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | D048 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | D048 |
| Precipitation, total defined period/in | monthly total | report only (in) | all year | S052 |
| pH | monthly minimum | report only (SU) | all year | S052 |
| pH | monthly maximum | report only (SU) | all year | S052 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S052 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S052 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | S052 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | S052 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | S052 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | S052 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | S052 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | S052 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | S052 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | S052 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | report only (mg/L) | all year | S052 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | S053 |
| pH | monthly minimum | report only (SU) | all year | S053 |
| pH | monthly maximum | report only (SU) | all year | S053 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S053 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S053 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | S053 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | S053 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | S053 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | S053 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | S053 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | S053 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | S053 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | report only (mg/L) | all year | S053 |
Cited limits by parameter: Minnesota's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MN0022080 · MCP: https://passage-data.com/mcp