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Sewage treatment plant, major discharger, Plainview, Minnesota. NPDES permit MN0055361, in force until Nov 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Specific conductance | monthly maximum | report only (umho/cm) | all year | D058 |
| Oxygen, dissolved [DO] | monthly minimum | report only (mg/L) | all year | D058 |
| pH | monthly minimum | ≥ 6 SU | all year | D058 |
| pH | monthly maximum | ≤ 9 SU | all year | D058 |
| Bicarbonate ion- [as HCO3] | monthly maximum | report only (mg/L) | all year | D058 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | D058 |
| Solids, total suspended | monthly maximum | report only (mg/L) | May, Sep | D058 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | D058 |
| Solids, total suspended | monthly average | ≤ 303 kg/d | all year | D058 |
| Solids, total suspended | maximum weekly average | ≤ 455 kg/d | all year | D058 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.7 mg/L | Oct, Nov | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.6 mg/L | Jan, Feb, Mar, Dec | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.3 mg/L | Apr, May | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Jun–Sep | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 47.5 kg/d | Oct, Nov | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 87 kg/d | Jan, Feb, Mar, Dec | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 33.3 kg/d | Apr, May | D058 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14.1 kg/d | Jun–Sep | D058 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D058 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D058 |
| Phosphorus, total [as P] | 12-month average | ≤ 1 mg/L | all year | D058 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | D058 |
| Phosphorus, total [as P] | monthly average | report only (kg/d) | all year | D058 |
| Phosphorus, total [as P] | annual total | ≤ 3689 kg/yr | all year | D058 |
| Calcium, total [as Ca] | monthly maximum | report only (mg/L) | all year | D058 |
| Magnesium, total [as Mg] | monthly maximum | report only (mg/L) | all year | D058 |
| Sodium, total [as Na] | monthly maximum | report only (mg/L) | all year | D058 |
| Potassium, total [as K] | monthly maximum | report only (mg/L) | all year | D058 |
| Chloride [as Cl] | monthly maximum | report only (mg/L) | all year | D058 |
| Sulfate, total [as SO4] | monthly maximum | report only (mg/L) | all year | D058 |
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | monthly maximum | report only (mg/L) | all year | D058 |
| Coliform, fecal MPN + membrane ftl 44.5 C | monthly geometric mean | ≤ 200 #/100mL | May–Oct | D058 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D058 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D058 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D058 |
| Solids, total dissolved | monthly maximum | report only (mg/L) | all year | D058 |
| Mercury, dissolved [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D058 |
| Mercury, total [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D058 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | D058 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 25 mg/L | all year | D058 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 152 kg/d | all year | D058 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 253 kg/d | all year | D058 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | D058 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | D058 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D072 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D072 |
| Precipitation, total defined period/in | monthly total | report only (in) | all year | S059 |
| pH | monthly minimum | report only (SU) | all year | S059 |
| pH | monthly maximum | report only (SU) | all year | S059 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S059 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S059 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | S059 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | S059 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | S059 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | S059 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | S059 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | report only (mg/L) | all year | S059 |
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/MN0055361 · MCP: https://passage-data.com/mcp