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Electric Services, major discharger, Center, North Dakota. NPDES permit ND0000370, in force until Jun 30, 2030. Last 12 months: over a limit 2 times (last June 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | E. coli, daily maximum | 1046 | ≤ 409 #/100mL | 156% |
| June 2026 | E. coli, daily maximum | 921 #/100mL | ≤ 409 #/100mL | 125% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .15 mg/L | all year | 001 |
| Chlorine, total residual | maximum | ≤ .2 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 73.7 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 25 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 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 | daily maximum | ≤ 45 mg/L | all year | 003 |
| Nitrogen, total [as N] | daily minimum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 003 |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 2.5 mg/L | all year | 003 |
| E. coli | daily minimum | report only (#/100mL) | Apr–Oct | 003 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Oct | 003 |
| E. coli | daily maximum | ≤ 409 #/100mL | Apr–Oct | 003 |
| pH | minimum | ≥ 6 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 008 |
| Duration | total | report only (d/mo) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Flow, total | total | report only (Mgal) | all year | 008 |
| Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia | maximum | < 1 tox acute (alert, not enforceable) | all year | 008 |
| TU Static Renewal 96Hr Acute Pimphales promelas | maximum | < 1 tox acute (alert, not enforceable) | all year | 008 |
| pH | minimum | ≥ 6.5 SU | all year | 019 |
| pH | maximum | ≤ 9 SU | all year | 019 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 019 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 019 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 019 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 019 |
| Duration | total | report only (d/mo) | all year | 019 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| Flow, total | total | report only (Mgal) | all year | 019 |
| pH | minimum | ≥ 6 SU | all year | 020 |
| pH | maximum | ≤ 9 SU | all year | 020 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 020 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 020 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 020 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 020 |
| Duration | total | report only (d/mo) | all year | 020 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 020 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 020 |
| Flow, total | total | report only (Mgal) | all year | 020 |
| pH | minimum | ≥ 6.5 SU | all year | 025 |
| pH | maximum | ≤ 9 SU | all year | 025 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 025 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 025 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 025 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 025 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 025 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 025 |
| Arsenic, total [as As] | monthly average | report only (ug/L) | all year | 025 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 025 |
| Boron, total [as B] | monthly average | report only (mg/L) | all year | 025 |
| Boron, total [as B] | daily maximum | report only (mg/L) | all year | 025 |
| Boron, total [as B] | monthly average | report only (mg/L) | all year | 025 |
| Boron, total [as B] | daily maximum | report only (mg/L) | all year | 025 |
| Boron, total [as B] | monthly average | report only (mg/L) | all year | 025 |
| Boron, total [as B] | daily maximum | report only (mg/L) | all year | 025 |
| Boron, total [as B] | monthly average | report only (mg/L) | all year | 025 |
| Boron, total [as B] | daily maximum | report only (mg/L) | all year | 025 |
| Boron, total [as B] | monthly average | report only (mg/L) | all year | 025 |
| Boron, total [as B] | daily maximum | report only (mg/L) | all year | 025 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 025 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 025 |
| Dichlorobromomethane | monthly average | report only (ug/L) | all year | 025 |
| Dichlorobromomethane | daily maximum | report only (ug/L) | all year | 025 |
| Bromoform | monthly average | report only (ug/L) | all year | 025 |
| Bromoform | daily maximum | report only (ug/L) | all year | 025 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 025 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 025 |
| Sodium, % total cations | monthly average | report only (%) | all year | 025 |
| Sodium, % total cations | daily maximum | report only (%) | all year | 025 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | maximum | < 5 tox chronic (alert, not enforceable) | all year | 025 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | maximum | < 5 tox chronic (alert, not enforceable) | all year | 025 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | CWI |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | CWI |
Cited limits by parameter: North Dakota's rules and the federal ones.
Same industry: the 6 Electric Services permits in North Dakota.
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