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Natural Gas Liquids, Tioga, North Dakota. NPDES permit ND0025836, in force until Mar 31, 2029. Last 12 months: no values over a limit, 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [COD], dissolved | daily minimum | report only (mg/L) | all year | 001 |
| Oxygen demand, chem. [COD], dissolved | monthly average | report only (mg/L) | all year | 001 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6 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 | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Oil & Grease | daily minimum | 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 |
| Sulfate, total [as SO4] | daily minimum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | ≤ 750 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/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 |
| Flow, total | monthly total | report only (Mgal) | all year | 001 |
| Duration of discharge | monthly total | report only (d) | all year | 001 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 001 |
| Oxygen demand, chem. [COD], dissolved | daily minimum | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | monthly average | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6 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 | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Oil & Grease | daily minimum | 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 |
| Sulfate, total [as SO4] | daily minimum | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | monthly average | ≤ 750 mg/L | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/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 |
| Flow, total | monthly total | report only (Mgal) | all year | 002 |
| Duration of discharge | monthly total | report only (d) | all year | 002 |
| Oil and grease visual | total | report only (N=0;Y=1) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | daily minimum | report only (mg/L) | all year | 003 |
| Oxygen demand, chem. [COD], dissolved | monthly average | report only (mg/L) | all year | 003 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (mg/L) | all year | 003 |
| pH | minimum | ≥ 6 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 | ≤ 35 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 003 |
| Oil & Grease | daily minimum | 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 |
| Sulfate, total [as SO4] | daily minimum | report only (mg/L) | all year | 003 |
| Sulfate, total [as SO4] | 30-day average | ≤ 750 mg/L | all year | 003 |
| Sulfate, total [as SO4] | daily maximum | 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 |
| Chlorine, total residual | daily minimum | report only (mg/L) | all year | 003 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 003 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 003 |
| Flow, total | monthly total | report only (Mgal) | all year | 003 |
| Duration of discharge | monthly total | report only (d) | 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/ND0025836 · MCP: https://passage-data.com/mcp