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Cheese, Natural And Processed, Perham, Minnesota. NPDES permit MN0047228, in force until Jul 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly maximum | ≤ 86 deg F | all year | D027 |
| Specific conductance | monthly maximum | report only (umho/cm) | all year | D027 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | D027 |
| pH | monthly minimum | ≥ 6 SU | all year | D027 |
| pH | monthly maximum | ≤ 9 SU | all year | D027 |
| Bicarbonate ion- [as HCO3] | monthly maximum | report only (mg/L) | all year | D027 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | D027 |
| Solids, total suspended | monthly maximum | ≤ 45 mg/L | all year | D027 |
| Solids, total suspended | monthly average | ≤ 111.13 kg/d | all year | D027 |
| Solids, total suspended | monthly maximum | ≤ 272.16 kg/d | all year | D027 |
| Nitrogen, total [as N] | monthly maximum | report only (mg/L) | Dec | D027 |
| Nitrogen, Kjeldahl, total [as N] | monthly maximum | report only (mg/L) | Dec | D027 |
| Nitrite + Nitrate total [as N] | monthly maximum | report only (mg/L) | Dec | D027 |
| Phosphorus, total [as P] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | D027 |
| Calcium, total [as Ca] | monthly maximum | report only (mg/L) | all year | D027 |
| Magnesium, total [as Mg] | monthly maximum | report only (mg/L) | all year | D027 |
| Sodium, total [as Na] | monthly maximum | report only (mg/L) | all year | D027 |
| Potassium, total [as K] | monthly maximum | report only (mg/L) | all year | D027 |
| Chloride [as Cl] | monthly maximum | report only (mg/L) | all year | D027 |
| Sulfate, total [as SO4] | monthly maximum | report only (mg/L) | all year | D027 |
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | monthly maximum | report only (mg/L) | all year | D027 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D027 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D027 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D027 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | D027 |
| Solids, total dissolved | monthly maximum | report only (mg/L) | all year | D027 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | D027 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | ≤ 40 mg/L | all year | D027 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 92.61 kg/d | all year | D027 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | ≤ 241.9 kg/d | all year | D027 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D036 |
| Nitrogen, ammonia total [as N] | annual average | report only (mg/L) | all year | D036 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | D036 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D036 |
| Chemical Oxygen Demand [COD] | annual average | report only (mg/L) | all year | D036 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D037 |
| Nitrogen, ammonia total [as N] | annual average | report only (mg/L) | all year | D037 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | D037 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D037 |
| Chemical Oxygen Demand [COD] | annual average | report only (mg/L) | all year | D037 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D049 |
| Nitrogen, ammonia total [as N] | annual average | report only (mg/L) | all year | D049 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | D049 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D049 |
| Chemical Oxygen Demand [COD] | annual average | report only (mg/L) | all year | D049 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D050 |
| Nitrogen, ammonia total [as N] | annual average | report only (mg/L) | all year | D050 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | D050 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D050 |
| Chemical Oxygen Demand [COD] | annual average | report only (mg/L) | all year | D050 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D051 |
| Nitrogen, ammonia total [as N] | annual average | report only (mg/L) | all year | D051 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | D051 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D051 |
| Chemical Oxygen Demand [COD] | annual average | report only (mg/L) | all year | D051 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | S028 |
| BOD, 5-day, 20 deg. C | monthly maximum | report only (mg/L) | all year | S028 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S028 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S028 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | S028 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | S028 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | S028 |
Cited limits by parameter: Minnesota's rules and the federal ones.
Same industry: the 28 Food and Kindred Products permits in Minnesota.
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