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Sewage treatment plant, Brewster, Minnesota. NPDES permit MN0021750, in force until May 31, 2028. 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 | D001 |
| Oxygen, dissolved [DO] | monthly minimum | report only (mg/L) | all year | D001 |
| pH | monthly minimum | ≥ 6 SU | all year | D001 |
| pH | monthly maximum | ≤ 9 SU | all year | D001 |
| Bicarbonate ion- [as HCO3] | monthly maximum | report only (mg/L) | all year | D001 |
| Solids, total suspended | monthly average | ≤ 45 mg/L | all year | D001 |
| Solids, total suspended | maximum weekly average | ≤ 65 mg/L | all year | D001 |
| Solids, total suspended | monthly average | ≤ 340 kg/d | all year | D001 |
| Solids, total suspended | maximum weekly average | ≤ 490 kg/d | all year | D001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | D001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | D001 |
| Phosphorus, total [as P] | monthly average | report only (kg/d) | all year | D001 |
| Calcium, total [as Ca] | monthly maximum | report only (mg/L) | all year | D001 |
| Magnesium, total [as Mg] | monthly maximum | report only (mg/L) | all year | D001 |
| Sodium, total [as Na] | monthly maximum | report only (mg/L) | all year | D001 |
| Potassium, total [as K] | monthly maximum | report only (mg/L) | all year | D001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | D001 |
| Chloride [as Cl] | daily maximum | ≤ 328 mg/L | all year | D001 |
| Chloride [as Cl] | monthly average | report only (kg/d) | all year | D001 |
| Chloride [as Cl] | daily maximum | report only (kg/d) | all year | D001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | D001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 2310 mg/L | all year | D001 |
| Sulfate, total [as SO4] | monthly average | report only (kg/d) | all year | D001 |
| Sulfate, total [as SO4] | daily maximum | report only (kg/d) | all year | D001 |
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | monthly maximum | report only (mg/L) | all year | D001 |
| Coliform, fecal MPN + membrane ftl 44.5 C | monthly geometric mean | ≤ 200 #/100mL | Apr–Oct | D001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Apr, May, Jun, Sep, Oct, Nov, Dec | D001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Jul, Aug | D001 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | Mar, Apr, May, Jun, Sep, Oct, Nov, Dec | D001 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | Jan, Feb, Jul, Aug | D001 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | Mar, Apr, May, Jun, Sep, Oct, Nov, Dec | D001 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | Jan, Feb, Jul, Aug | D001 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | D001 |
| Solids, total dissolved | daily maximum | ≤ 4607 mg/L | all year | D001 |
| Solids, total dissolved | monthly average | report only (kg/d) | all year | D001 |
| Solids, total dissolved | daily maximum | report only (kg/d) | all year | D001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | D001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | all year | D001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 189 kg/d | all year | D001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 302 kg/d | all year | D001 |
| Precipitation, total defined period/in | monthly total | report only (in) | all year | S003 |
| pH | quarterly maximum | report only (SU) | Mar, Jun, Sep, Dec | S003 |
| Solids, total suspended | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Nitrogen, total [as N] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Nitrogen, Kjeldahl, total [as N] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Nitrite + Nitrate total [as N] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Phosphorus, total [as P] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | S003 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | S003 |
| BOD, carbonaceous [5 day, 20 C] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S003 |
| Parameter | New limit | From | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C], monthly average | 15.05 kg/d | Nov 1, 2026 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], monthly average | 15 mg/L | Nov 1, 2026 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25.08 kg/d | Nov 1, 2026 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25 mg/L | Nov 1, 2026 | tighter | — | — |
| Solids, total suspended, monthly average | 32.5 kg/d | Nov 1, 2026 | tighter | 30 kg/d (3 values) | 0.923× |
| Solids, total suspended, maximum weekly average | 46.75 kg/d | Nov 1, 2026 | tighter | 30 kg/d (3 values) | 0.642× |
| BOD, carbonaceous [5 day, 20 C], monthly average | 15 mg/L | Dec 1, 2027 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], monthly average | 15.05 kg/d | Dec 1, 2027 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25 mg/L | Dec 1, 2027 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25.08 kg/d | Dec 1, 2027 | tighter | — | — |
| Solids, total suspended, monthly average | 32.5 kg/d | Dec 1, 2027 | tighter | 30 kg/d (3 values) | 0.923× |
| Solids, total suspended, maximum weekly average | 46.75 kg/d | Dec 1, 2027 | tighter | 30 kg/d (3 values) | 0.642× |
| Sulfate, total [as SO4], daily maximum | 908 mg/L (Jan, Mar, May, Jul, Sep, Nov) | Dec 1, 2027 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], monthly average | 15 mg/L | May 1, 2028 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], monthly average | 15.05 kg/d | May 1, 2028 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25.08 kg/d | May 1, 2028 | tighter | — | — |
| BOD, carbonaceous [5 day, 20 C], maximum weekly average | 25 mg/L | May 1, 2028 | tighter | — | — |
| Solids, total suspended, monthly average | 32.5 kg/d | May 1, 2028 | tighter | 30 kg/d (3 values) | 0.923× |
| Solids, total suspended, maximum weekly average | 46.75 kg/d | May 1, 2028 | tighter | 30 kg/d (3 values) | 0.642× |
| Sulfate, total [as SO4], daily maximum | 908 mg/L (Jan, Mar, May, Jul, Sep, Nov) | May 1, 2028 | tighter | — | — |
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/MN0021750 · MCP: https://passage-data.com/mcp