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Sewage treatment plant, Rugby, North Dakota. NPDES permit ND0022926, in force until Mar 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | minimum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | minimum | report only (ug/L) | all year | 002 |
| Cyanide, total [as CN] | average | report only (ug/L) | all year | 002 |
| Cyanide, total [as CN] | maximum | report only (ug/L) | all year | 002 |
| Hardness, total [as CaCO3] | minimum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | minimum | report only (ug/L) | all year | 002 |
| Arsenic, total [as As] | average | report only (ug/L) | all year | 002 |
| Arsenic, total [as As] | maximum | report only (ug/L) | all year | 002 |
| Beryllium, total [as Be] | minimum | report only (ug/L) | all year | 002 |
| Beryllium, total [as Be] | average | report only (ug/L) | all year | 002 |
| Beryllium, total [as Be] | maximum | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | minimum | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | average | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | maximum | report only (ug/L) | all year | 002 |
| Chromium, total [as Cr] | minimum | report only (ug/L) | all year | 002 |
| Chromium, total [as Cr] | average | report only (ug/L) | all year | 002 |
| Chromium, total [as Cr] | maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | minimum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | maximum | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | minimum | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | average | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | maximum | report only (ug/L) | all year | 002 |
| Thallium, total [as Tl] | minimum | report only (ug/L) | all year | 002 |
| Thallium, total [as Tl] | average | report only (ug/L) | all year | 002 |
| Thallium, total [as Tl] | maximum | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | minimum | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | average | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | maximum | report only (ug/L) | all year | 002 |
| Silver, total [as Ag] | minimum | report only (ug/L) | all year | 002 |
| Silver, total [as Ag] | average | report only (ug/L) | all year | 002 |
| Silver, total [as Ag] | maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | minimum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | average | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | maximum | report only (ug/L) | all year | 002 |
| Antimony, total [as Sb] | minimum | report only (ug/L) | all year | 002 |
| Antimony, total [as Sb] | average | report only (ug/L) | all year | 002 |
| Antimony, total [as Sb] | maximum | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | minimum | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | average | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | maximum | report only (ug/L) | all year | 002 |
| Total phenols | minimum | report only (ug/L) | all year | 002 |
| Total phenols | average | report only (ug/L) | all year | 002 |
| Total phenols | maximum | report only (ug/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 409 #/100mL | all year | 002 |
| Flow, total | total | report only (Mgal) | all year | 002 |
| Mercury, total [as Hg] | minimum | report only (ug/L) | all year | 002 |
| Mercury, total [as Hg] | average | report only (ug/L) | all year | 002 |
| Mercury, total [as Hg] | maximum | report only (ug/L) | all year | 002 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | minimum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Cyanide, total [as CN] | minimum | report only (ug/L) | all year | 003 |
| Cyanide, total [as CN] | average | report only (ug/L) | all year | 003 |
| Cyanide, total [as CN] | maximum | report only (ug/L) | all year | 003 |
| Hardness, total [as CaCO3] | minimum | report only (mg/L) | all year | 003 |
| Hardness, total [as CaCO3] | average | report only (mg/L) | all year | 003 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) | all year | 003 |
| Arsenic, total [as As] | minimum | report only (ug/L) | all year | 003 |
| Arsenic, total [as As] | average | report only (ug/L) | all year | 003 |
| Arsenic, total [as As] | maximum | report only (ug/L) | all year | 003 |
| Beryllium, total [as Be] | minimum | report only (ug/L) | all year | 003 |
| Beryllium, total [as Be] | average | report only (ug/L) | all year | 003 |
| Beryllium, total [as Be] | maximum | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | minimum | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | average | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | maximum | report only (ug/L) | all year | 003 |
| Chromium, total [as Cr] | minimum | report only (ug/L) | all year | 003 |
| Chromium, total [as Cr] | average | report only (ug/L) | all year | 003 |
| Chromium, total [as Cr] | maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | minimum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | average | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | maximum | report only (ug/L) | all year | 003 |
| Lead, total [as Pb] | minimum | report only (ug/L) | all year | 003 |
| Lead, total [as Pb] | average | report only (ug/L) | all year | 003 |
| Lead, total [as Pb] | maximum | report only (ug/L) | all year | 003 |
| Thallium, total [as Tl] | minimum | report only (ug/L) | all year | 003 |
| Thallium, total [as Tl] | average | report only (ug/L) | all year | 003 |
| Thallium, total [as Tl] | maximum | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | minimum | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | average | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | maximum | report only (ug/L) | all year | 003 |
| Silver, total [as Ag] | minimum | report only (ug/L) | all year | 003 |
| Silver, total [as Ag] | average | report only (ug/L) | all year | 003 |
| Silver, total [as Ag] | maximum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | minimum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | average | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | maximum | report only (ug/L) | all year | 003 |
| Antimony, total [as Sb] | minimum | report only (ug/L) | all year | 003 |
| Antimony, total [as Sb] | average | report only (ug/L) | all year | 003 |
| Antimony, total [as Sb] | maximum | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | minimum | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | average | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | maximum | report only (ug/L) | all year | 003 |
| Total phenols | minimum | report only (ug/L) | all year | 003 |
| Total phenols | average | report only (ug/L) | all year | 003 |
| Total phenols | maximum | report only (ug/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 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 003 |
| E. coli | daily maximum | ≤ 409 #/100mL | all year | 003 |
| Flow, total | total | report only (Mgal) | all year | 003 |
| Mercury, total [as Hg] | minimum | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | average | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | maximum | report only (ug/L) | all year | 003 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 003 |
Cited limits by parameter: North Dakota's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/ND0022926 · MCP: https://passage-data.com/mcp