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Sewage treatment plant, major discharger, Farmington, Minnesota. NPDES permit MN0045845 expired Jul 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | report only (mg/L) | all year | D118 |
| pH | monthly minimum | ≥ 6 SU | all year | D118 |
| pH | monthly maximum | ≤ 9 SU | all year | D118 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | D118 |
| Solids, total suspended | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | D118 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | D118 |
| Solids, total suspended | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | D118 |
| Solids, total suspended | monthly average | ≤ 3244 kg/d | all year | D118 |
| Solids, total suspended | maximum weekly average | ≤ 4866 kg/d | all year | D118 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D118 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D118 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Jun–Sep | D118 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 4.5 mg/L | Jun–Sep | D118 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 324 kg/d | Jun–Sep | D118 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 487 kg/d | Jun–Sep | D118 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D118 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D118 |
| Phosphorus, total [as P] | 12-month average | ≤ 1 mg/L | all year | D118 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | D118 |
| Phosphorus, total [as P] | monthly average | report only (kg/d) | all year | D118 |
| Coliform, fecal MPN + membrane ftl 44.5 C | monthly geometric mean | ≤ 200 #/100mL | Apr–Oct | D118 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D118 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D118 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D118 |
| Perfluorooctanoic acid (PFOA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorobutanoic acid (PFBA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorooctanesulfonamide (PFOSA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorooctanesulfonate | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorooctanesulfonate | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluoropentanoic acid (PFPeA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorohexanoic acid (PFHxA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluoroheptanoic acid (PFHpA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorononanoic acid (PFNA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorodecanoic acid (PFDA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluoroundecanoic acid (PFUnA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorododecanoic acid (PFDoA) | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorobutane Sulfonate | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorobutane Sulfonate | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Perfluorohexane Sulfonate | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Perfluorohexane Sulfonate | daily maximum | report only (mg/d) | Mar, Jun, Sep, Dec | D118 |
| Mercury, dissolved [as Hg] | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Mercury, dissolved [as Hg] | quarterly maximum | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| Mercury, total [as Hg] | quarterly average | ≤ 6.9 ng/L | Mar, Jun, Sep, Dec | D118 |
| Mercury, total [as Hg] | quarterly maximum | report only (ng/L) | Mar, Jun, Sep, Dec | D118 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | Jun–Sep | D118 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D118 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 15 mg/L | Jun–Sep | D118 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D118 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1081 kg/d | Jun–Sep | D118 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 2704 kg/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D118 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 1622 kg/d | Jun–Sep | D118 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 4326 kg/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | D118 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | D118 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | D118 |
| Solids, total suspended | minimum | report only (mg/L) | all year | D123 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D123 |
| Solids, total suspended | annual maximum | report only (mg/L) | all year | D123 |
| BOD, carbonaceous [5 day, 20 C] | minimum | report only (mg/L) | all year | D123 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D123 |
| BOD, carbonaceous [5 day, 20 C] | annual maximum | report only (mg/L) | all year | D123 |
| Solids, total suspended | minimum | report only (mg/L) | all year | D124 |
| Solids, total suspended | annual average | report only (mg/L) | all year | D124 |
| Solids, total suspended | annual maximum | report only (mg/L) | all year | D124 |
| BOD, carbonaceous [5 day, 20 C] | minimum | report only (mg/L) | all year | D124 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | D124 |
| BOD, carbonaceous [5 day, 20 C] | annual maximum | report only (mg/L) | all year | D124 |
| Precipitation, total defined period/in | monthly total | report only (in) | all year | S119 |
| pH | monthly minimum | report only (SU) | all year | S119 |
| pH | monthly maximum | report only (SU) | all year | S119 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S119 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S119 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | S119 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | S119 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | S119 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | S119 |
| Mercury, total [as Hg] | quarterly average | report only (ng/L) | Mar, Jun, Sep, Dec | S119 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | S119 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | report only (mg/L) | all year | S119 |
Cited limits by parameter: Minnesota'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/MN0045845 · MCP: https://passage-data.com/mcp