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Industrial or other facility, Zap, North Dakota. NPDES permit ND0026697, in force until Sep 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow rate | monthly average | report only (gal/min) | all year | 001 |
| Flow rate | daily maximum | report only (gal/min) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 001 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 001 |
| Flow, total | total | report only (Mgal) | all year | 001 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 001 |
| Flow rate | monthly average | report only (gal/min) | all year | 002 |
| Flow rate | daily maximum | report only (gal/min) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Solids, settleable | daily average | report only (mL/L) | all year | 002 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 002 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 002 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 002 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 002 |
| Flow, total | total | report only (Mgal) | all year | 002 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 002 |
| Flow rate | monthly average | report only (gal/min) | all year | 003 |
| Flow rate | daily maximum | report only (gal/min) | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 003 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 003 |
| Solids, settleable | daily average | report only (mL/L) | all year | 003 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 003 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 003 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 003 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 003 |
| Flow, total | total | report only (Mgal) | all year | 003 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 003 |
| Flow rate | monthly average | report only (gal/min) | all year | 004 |
| Flow rate | daily maximum | report only (gal/min) | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 004 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 004 |
| Solids, settleable | daily average | report only (mL/L) | all year | 004 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 004 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 004 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 004 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 004 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 004 |
| Flow, total | total | report only (Mgal) | all year | 004 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 004 |
| Flow rate | monthly average | report only (gal/min) | all year | 005 |
| Flow rate | daily maximum | report only (gal/min) | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 005 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 005 |
| Solids, settleable | daily average | report only (mL/L) | all year | 005 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 005 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 005 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 005 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 005 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 005 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 005 |
| Flow, total | total | report only (Mgal) | all year | 005 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 005 |
| Flow rate | monthly average | report only (gal/min) | all year | 006 |
| Flow rate | daily maximum | report only (gal/min) | all year | 006 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 006 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 006 |
| Solids, settleable | daily average | report only (mL/L) | all year | 006 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 006 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 006 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 006 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 006 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 006 |
| Flow, total | total | report only (Mgal) | all year | 006 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 006 |
| Flow rate | monthly average | report only (gal/min) | all year | 007 |
| Flow rate | daily maximum | report only (gal/min) | all year | 007 |
| pH | minimum | ≥ 6 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 007 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Solids, settleable | daily average | report only (mL/L) | all year | 007 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 007 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 007 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 007 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 007 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 007 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 007 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 007 |
| Flow, total | total | report only (Mgal) | all year | 007 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 007 |
| Flow rate | monthly average | report only (gal/min) | all year | 008 |
| Flow rate | daily maximum | report only (gal/min) | all year | 008 |
| pH | minimum | ≥ 6 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 008 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 008 |
| Solids, settleable | daily average | report only (mL/L) | all year | 008 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 008 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 008 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 008 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 008 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 008 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 008 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 008 |
| Flow, total | total | report only (Mgal) | all year | 008 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 008 |
| Flow rate | monthly average | report only (gal/min) | all year | 009 |
| Flow rate | daily maximum | report only (gal/min) | all year | 009 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 009 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 009 |
| Solids, settleable | daily average | report only (mL/L) | all year | 009 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 009 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 009 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 009 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 009 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 009 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 009 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 009 |
| Flow, total | total | report only (Mgal) | all year | 009 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 009 |
| Flow rate | monthly average | report only (gal/min) | all year | 010 |
| Flow rate | daily maximum | report only (gal/min) | all year | 010 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 010 |
| Solids, settleable | daily average | report only (mL/L) | all year | 010 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 010 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 010 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 010 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 010 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 010 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 010 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 010 |
| Flow, total | total | report only (Mgal) | all year | 010 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 010 |
| Flow rate | monthly average | report only (gal/min) | all year | 012 |
| Flow rate | daily maximum | report only (gal/min) | all year | 012 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 9 SU | all year | 012 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 012 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 012 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 012 |
| Solids, settleable | daily average | report only (mL/L) | all year | 012 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 012 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 012 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 012 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 012 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 012 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 012 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 012 |
| Flow, total | total | report only (Mgal) | all year | 012 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 012 |
| Flow rate | monthly average | report only (gal/min) | all year | 013 |
| Flow rate | daily maximum | report only (gal/min) | all year | 013 |
| pH | minimum | ≥ 6 SU | all year | 013 |
| pH | maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 013 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 013 |
| Solids, settleable | daily average | report only (mL/L) | all year | 013 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 013 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 013 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 013 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 013 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 013 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 013 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 013 |
| Flow, total | total | report only (Mgal) | all year | 013 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 013 |
| Flow rate | monthly average | report only (gal/min) | all year | 014 |
| Flow rate | daily maximum | report only (gal/min) | all year | 014 |
| pH | minimum | ≥ 6 SU | all year | 014 |
| pH | maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 014 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 014 |
| Solids, settleable | daily average | report only (mL/L) | all year | 014 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 014 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 014 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 014 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 014 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 014 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 014 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 014 |
| Flow, total | total | report only (Mgal) | all year | 014 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 014 |
| Flow rate | monthly average | report only (gal/min) | all year | 015 |
| Flow rate | daily maximum | report only (gal/min) | all year | 015 |
| pH | minimum | ≥ 6 SU | all year | 015 |
| pH | maximum | ≤ 9 SU | all year | 015 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 015 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 015 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 015 |
| Solids, settleable | daily average | report only (mL/L) | all year | 015 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 015 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 015 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 015 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 015 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 015 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 015 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 015 |
| Flow, total | total | report only (Mgal) | all year | 015 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 015 |
| Flow rate | monthly average | report only (gal/min) | all year | 016 |
| Flow rate | daily maximum | report only (gal/min) | all year | 016 |
| pH | minimum | ≥ 6 SU | all year | 016 |
| pH | maximum | ≤ 9 SU | all year | 016 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 016 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 016 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 016 |
| Solids, settleable | daily average | report only (mL/L) | all year | 016 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 016 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 016 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 016 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 016 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 016 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 016 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 016 |
| Flow, total | total | report only (Mgal) | all year | 016 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 016 |
| Flow rate | monthly average | report only (gal/min) | all year | 017 |
| Flow rate | daily maximum | report only (gal/min) | all year | 017 |
| pH | minimum | ≥ 6 SU | all year | 017 |
| pH | maximum | ≤ 9 SU | all year | 017 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 017 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 017 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 017 |
| Solids, settleable | daily average | report only (mL/L) | all year | 017 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 017 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 017 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 017 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 017 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 017 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 017 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 017 |
| Flow, total | total | report only (Mgal) | all year | 017 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 017 |
| Flow rate | monthly average | report only (gal/min) | all year | 018 |
| Flow rate | daily maximum | report only (gal/min) | all year | 018 |
| pH | minimum | ≥ 6 SU | all year | 018 |
| pH | maximum | ≤ 9 SU | all year | 018 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 018 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 018 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 018 |
| Solids, settleable | daily average | report only (mL/L) | all year | 018 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 018 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 018 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 018 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 018 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 018 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 018 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 018 |
| Flow, total | total | report only (Mgal) | all year | 018 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 018 |
| Flow rate | monthly average | report only (gal/min) | all year | 019 |
| Flow rate | daily maximum | report only (gal/min) | all year | 019 |
| pH | minimum | ≥ 6 SU | all year | 019 |
| pH | maximum | ≤ 9 SU | all year | 019 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 019 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 019 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 019 |
| Solids, settleable | daily average | report only (mL/L) | all year | 019 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 019 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 019 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 019 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 019 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 019 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 019 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 019 |
| Flow, total | total | report only (Mgal) | all year | 019 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 019 |
| Flow rate | monthly average | report only (gal/min) | all year | 020 |
| Flow rate | daily maximum | report only (gal/min) | all year | 020 |
| pH | minimum | ≥ 6 SU | all year | 020 |
| pH | maximum | ≤ 9 SU | all year | 020 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 020 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 020 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 020 |
| Solids, settleable | daily average | report only (mL/L) | all year | 020 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 020 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 020 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 020 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 020 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 020 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 020 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 020 |
| Flow, total | total | report only (Mgal) | all year | 020 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 020 |
| Flow rate | monthly average | report only (gal/min) | all year | 021 |
| Flow rate | daily maximum | report only (gal/min) | all year | 021 |
| pH | minimum | ≥ 6 SU | all year | 021 |
| pH | maximum | ≤ 9 SU | all year | 021 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 021 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 021 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 021 |
| Solids, settleable | daily average | report only (mL/L) | all year | 021 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 021 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 021 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 021 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 021 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 021 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 021 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 021 |
| Flow, total | total | report only (Mgal) | all year | 021 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 021 |
| Flow rate | monthly average | report only (gal/min) | all year | 022 |
| Flow rate | daily maximum | report only (gal/min) | all year | 022 |
| pH | minimum | ≥ 6 SU | all year | 022 |
| pH | maximum | ≤ 9 SU | all year | 022 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 022 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 022 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 022 |
| Solids, settleable | daily average | report only (mL/L) | all year | 022 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 022 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 022 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 022 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 022 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 022 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 022 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 022 |
| Flow, total | total | report only (Mgal) | all year | 022 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 022 |
| Flow rate | monthly average | report only (gal/min) | all year | 023 |
| Flow rate | daily maximum | report only (gal/min) | all year | 023 |
| pH | minimum | ≥ 6 SU | all year | 023 |
| pH | maximum | ≤ 9 SU | all year | 023 |
| Solids, total suspended | minimum value | report only (mg/L) | all year | 023 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 023 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 023 |
| Solids, settleable | daily average | report only (mL/L) | all year | 023 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 023 |
| Oil & Grease | minimum value | report only (mg/L) | all year | 023 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 023 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 023 |
| Iron, total [as Fe] | minimum value | report only (mg/L) | all year | 023 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 023 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 023 |
| Flow, total | total | report only (Mgal) | all year | 023 |
| Oil and grease visual | total | ≤ 0 N=0;Y=1 | all year | 023 |
| Stream flow, instantaneous | monthly average | report only (cfs) | all year | M01 |
| Stream flow, instantaneous | daily maximum | report only (cfs) | all year | M01 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | M01 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | M01 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | M01 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | M01 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | M01 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | M01 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | M01 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | M01 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | M01 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | M01 |
| Stream flow, instantaneous | monthly average | report only (cfs) | all year | M02 |
| Stream flow, instantaneous | daily maximum | report only (cfs) | all year | M02 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | M02 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | M02 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | M02 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | M02 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | M02 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | M02 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | M02 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | M02 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | M02 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | M02 |
| Stream flow, instantaneous | monthly average | report only (cfs) | all year | M04 |
| Stream flow, instantaneous | daily maximum | report only (cfs) | all year | M04 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | M04 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | M04 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | M04 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | M04 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | M04 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | M04 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | M04 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | M04 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | M04 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | M04 |
Cited limits by parameter: North Dakota's rules and the federal ones.
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