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Sewage treatment plant, major discharger, Mandan, North Dakota. NPDES permit ND0022861, in force until Sep 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Stream flow, instantaneous | daily maximum | report only (cfs) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | minimum | report only (SU) | all year |
| pH | maximum | report only (SU) | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year |
| Nitrogen, total [as N] | maximum | report only (mg/L) (alert, not enforceable) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | maximum | report only (mg/L) (alert, not enforceable) | all year |
| Cyanide, total [as CN] | maximum monthly average | report only (mg/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year |
| Cyanide, total [as CN] | maximum monthly average | report only (mg/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | maximum monthly average | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | maximum monthly average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | maximum monthly average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Beryllium, total [as Be] | maximum monthly average | report only (mg/L) | all year |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year |
| Beryllium, total [as Be] | maximum monthly average | report only (mg/L) | all year |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | maximum monthly average | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | maximum monthly average | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | maximum monthly average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | maximum monthly average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | maximum monthly average | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | maximum monthly average | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Thallium, total [as Tl] | maximum monthly average | report only (mg/L) | all year |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year |
| Thallium, total [as Tl] | maximum monthly average | report only (mg/L) | all year |
| Thallium, total [as Tl] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | maximum monthly average | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | maximum monthly average | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | maximum monthly average | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Silver, total [as Ag] | maximum monthly average | report only (mg/L) | all year |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | maximum monthly average | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | maximum monthly average | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Antimony, total [as Sb] | maximum monthly average | report only (mg/L) | all year |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year |
| Antimony, total [as Sb] | maximum monthly average | report only (mg/L) | all year |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | maximum monthly average | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | maximum monthly average | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Total phenols | maximum monthly average | report only (mg/L) | all year |
| Total phenols | daily maximum | report only (mg/L) | all year |
| Total phenols | maximum monthly average | report only (mg/L) | all year |
| Total phenols | daily maximum | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| BOD, percent removal [total] | minimum value | ≥ 85 % | all year |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year |
| E. coli | daily maximum | ≤ 409 #/100mL | all year |
| Flow, total | total | report only (Mgal) | all year |
| Mercury, total [as Hg] | maximum monthly average | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | maximum monthly average | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Solids, suspended percent removal | minimum value | ≥ 85 % | all year |
| Duration of discharge | total | report only (d) | all year |
| Oil and grease visual | total | report only (N=0;Y=1) | all year |
| Report due [yrmoda] | total | report only (N=0;Y=1) (alert, not enforceable) | all year |
| Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia | maximum value | ≤ 1 tox acute | all year |
| TU Static Renewal 96Hr Acute Pimphales promelas | maximum value | ≤ 1 tox acute | all year |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | maximum value | report only (tox chronic) | all year |
| TU Static Renewal 7-Day Chronic Pimphales promelas | maximum value | report only (tox chronic) | all year |
Cited limits by parameter: North Dakota'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/ND0022861 · MCP: https://passage-data.com/mcp