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Sewage treatment plant, major discharger, Devils Lake, North Dakota. NPDES permit ND0020681, in force until Mar 31, 2028. Last 12 months: no values over a limit, 12 required values missing, 4 of 35 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily minimum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily average | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily minimum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily minimum | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | daily average | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Beryllium, total [as Be] | daily minimum | report only (ug/L) | all year | 001 |
| Beryllium, total [as Be] | daily average | report only (ug/L) | all year | 001 |
| Beryllium, total [as Be] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily minimum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily average | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily minimum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily average | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily minimum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily average | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily minimum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily average | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Thallium, total [as Tl] | daily minimum | report only (ug/L) | all year | 001 |
| Thallium, total [as Tl] | daily average | report only (ug/L) | all year | 001 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily minimum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily average | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | daily minimum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | daily average | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily minimum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily average | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Antimony, total [as Sb] | daily minimum | report only (ug/L) | all year | 001 |
| Antimony, total [as Sb] | daily average | report only (ug/L) | all year | 001 |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily minimum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily average | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Total phenols | daily minimum | report only (ug/L) | all year | 001 |
| Total phenols | daily average | report only (ug/L) | all year | 001 |
| Total phenols | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| E. coli | daily minimum | report only (#/100mL) | Apr–Oct | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Oct | 001 |
| E. coli | daily maximum | ≤ 409 #/100mL | Apr–Oct | 001 |
| Mercury, total [as Hg] | daily minimum | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 001 |
| Toxic Units Static 48HR Acute Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year | 001 |
| TU LC50 Static Renewal 96Hr Acute Pimephales promelas | daily maximum | ≤ 1 tox acute | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 003 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 003 |
| pH | minimum | report only (SU) | all year | 003 |
| pH | maximum | report only (SU) | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 003 |
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 004 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 004 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 004 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | 004 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Cyanide, total [as CN] | daily minimum | report only (mg/L) | all year | 004 |
| Cyanide, total [as CN] | daily average | report only (mg/L) | all year | 004 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 004 |
| Hardness, total [as CaCO3] | daily minimum | report only (mg/L) | all year | 004 |
| Hardness, total [as CaCO3] | daily average | report only (mg/L) | all year | 004 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 004 |
| Arsenic, total [as As] | daily minimum | report only (ug/L) | all year | 004 |
| Arsenic, total [as As] | daily average | report only (ug/L) | all year | 004 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 004 |
| Beryllium, total [as Be] | daily minimum | report only (ug/L) | all year | 004 |
| Beryllium, total [as Be] | daily average | report only (ug/L) | all year | 004 |
| Beryllium, total [as Be] | daily maximum | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | daily minimum | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | daily average | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 004 |
| Chromium, total [as Cr] | daily minimum | report only (ug/L) | all year | 004 |
| Chromium, total [as Cr] | daily average | report only (ug/L) | all year | 004 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | daily minimum | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | daily average | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 004 |
| Lead, total [as Pb] | daily minimum | report only (ug/L) | all year | 004 |
| Lead, total [as Pb] | daily average | report only (ug/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 004 |
| Thallium, total [as Tl] | daily minimum | report only (ug/L) | all year | 004 |
| Thallium, total [as Tl] | daily average | report only (ug/L) | all year | 004 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | daily minimum | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | daily average | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 004 |
| Silver, total [as Ag] | daily minimum | report only (ug/L) | all year | 004 |
| Silver, total [as Ag] | daily average | report only (ug/L) | all year | 004 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | daily minimum | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | daily average | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 004 |
| Antimony, total [as Sb] | daily minimum | report only (ug/L) | all year | 004 |
| Antimony, total [as Sb] | daily average | report only (ug/L) | all year | 004 |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | daily minimum | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | daily average | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 004 |
| Total phenols | daily minimum | report only (ug/L) | all year | 004 |
| Total phenols | daily average | report only (ug/L) | all year | 004 |
| Total phenols | daily maximum | report only (ug/L) | all year | 004 |
| Duration | total | report only (d/mo) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| E. coli | daily minimum | report only (#/100mL) | Apr–Oct | 004 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Oct | 004 |
| E. coli | daily maximum | ≤ 409 #/100mL | Apr–Oct | 004 |
| Mercury, total [as Hg] | daily minimum | report only (ug/L) | all year | 004 |
| Mercury, total [as Hg] | daily average | report only (ug/L) | all year | 004 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 004 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 004 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 004 |
| Toxic Units Static 48HR Acute Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year | 004 |
| TU LC50 Static Renewal 96Hr Acute Pimephales promelas | daily maximum | ≤ 1 tox acute | all year | 004 |
Cited limits by parameter: North Dakota's rules and the federal ones.
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