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Federal facility (Sewerage Systems), Coleharbor, North Dakota. NPDES permit ND0023892, in force until Jun 30, 2028. 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 | daily minimum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 25 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 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 | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Oil & Grease | daily minimum | report only (mg/L) | all year | 001 |
| Oil & Grease | 30-day average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 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 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (gal/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 001 |
| Chlorine, total residual | daily minimum | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 001 |
| E. coli | daily minimum | report only (#/100mL) | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 409 #/100mL | all year | 001 |
| Duration of discharge | total | report only (d) | all year | 001 |
| Flow, total | total | report only (gal/mo) | all year | 001 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Duration of discharge | total | report only (d) | all year | 002 |
| Flow, total | total | report only (gal/mo) | all year | 002 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 002 |
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/ND0023892 · MCP: https://passage-data.com/mcp