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Federal facility, Riverdale, North Dakota. NPDES permit ND0020605, in force until Mar 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Compliance With Best Management Practices | total | report only (pass=0;fail=1) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 003 |
| Temperature, water deg. fahrenheit | daily minimum | report only (deg F) | all year | 004 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 004 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 004 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 004 |
| Compliance With Best Management Practices | total | report only (pass=0;fail=1) | all year | 005 |
| Compliance With Best Management Practices | total | report only (pass=0;fail=1) | all year | 006 |
| Compliance With Best Management Practices | total | report only (pass=0;fail=1) | all year | 007 |
| Compliance With Best Management Practices | total | report only (pass=0;fail=1) | all year | 008 |
| Temperature, water deg. centigrade | minimum | report only (deg C) | all year | 009 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 009 |
| Stream flow, instantaneous | minimum | report only (cfs) | all year | 009 |
| Stream flow, instantaneous | average | report only (cfs) | all year | 009 |
| Stream flow, instantaneous | maximum | report only (cfs) | all year | 009 |
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 009 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 009 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 009 |
| pH | minimum | ≥ 6.5 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| pH | minimum | report only (SU) | all year | 009 |
| pH | maximum | report only (SU) | all year | 009 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 009 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 009 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | 009 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Nitrogen, ammonia total [as N] | minimum | report only (mg/L) | all year | 009 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 009 |
| E. coli | daily minimum | report only (#/100mL) | all year | 009 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 009 |
| E. coli | daily maximum | ≤ 409 #/100mL | all year | 009 |
| Flow, total | semi-annual total | report only (Mgal/mo) | all year | 009 |
| Temperature, water deg. centigrade | minimum | report only (deg C) | all year | 010 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 010 |
| Stream flow, instantaneous | minimum | report only (cfs) | all year | 010 |
| Stream flow, instantaneous | average | report only (cfs) | all year | 010 |
| Stream flow, instantaneous | maximum | report only (cfs) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 010 |
| pH | minimum | ≥ 6.5 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| pH | minimum | report only (SU) | all year | 010 |
| pH | maximum | report only (SU) | all year | 010 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 010 |
| Nitrogen, ammonia total [as N] | minimum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | average | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | minimum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | maximum | report only (mg/L) | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| E. coli | daily minimum | report only (#/100mL) | all year | 010 |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | all year | 010 |
| E. coli | daily maximum | ≤ 409 #/100mL | all year | 010 |
| Flow, total | semi-annual total | report only (Mgal/mo) | all year | 010 |
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/ND0020605 · MCP: https://passage-data.com/mcp