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Industrial or other facility, major discharger, Mandan, North Dakota. NPDES permit ND0000248, in force until Mar 31, 2028. Last 12 months: over a limit 7 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| June 2026 | 003 | Sulfide, total [as S], 30-day average | 4.89 lb/d | ≤ 1.8 lb/d | 172% |
| June 2026 | 003 | Sulfide, total [as S], daily maximum | 4.89 lb/d | ≤ 4.1 lb/d | 19% |
| July 2026 | 002 | BOD, 5-day, 20 deg. C, daily maximum | 55 mg/L | ≤ 45 mg/L | 22% |
| July 2026 | 003 | Sulfide, total [as S], 30-day average | 33.49 lb/d | ≤ 1.84 lb/d | 1720% |
| July 2026 | 003 | Sulfide, total [as S], daily maximum | 71.81 lb/d | ≤ 4.13 lb/d | 1639% |
| August 2026 | 003 | Sulfide, total [as S], 30-day average | 15.33 lb/d | ≤ 1.84 lb/d | 733% |
| August 2026 | 003 | Sulfide, total [as S], daily maximum | 61.58 lb/d | ≤ 4.13 lb/d | 1391% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 25 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | daily minimum | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | 30-day average | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | 30-day average | report only (lb/d) | all year | 002 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (lb/d) | 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 | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 002 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 002 |
| Oil & Grease | daily minimum | report only (mg/L) | all year | 002 |
| Oil & Grease | 30-day average | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | 30-day average | report only (lb/d) | all year | 002 |
| Oil & Grease | daily maximum | report only (lb/d) | all year | 002 |
| Nitrogen, total [as N] | minimum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | minimum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | maximum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | daily minimum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | 30-day average | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | 30-day average | report only (lb/d) | all year | 002 |
| Sulfide, total [as S] | daily maximum | report only (lb/d) | all year | 002 |
| Chloride [as Cl] | daily minimum | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | minimum | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | average | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | maximum | report only (mg/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | daily minimum | report only (mg/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | 30-day average | report only (mg/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | 30-day average | report only (lb/d) | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (lb/d) | all year | 002 |
| Chromium, total [as Cr] | daily minimum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | 30-day average | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | 30-day average | report only (lb/d) | all year | 002 |
| Chromium, total [as Cr] | daily maximum | report only (lb/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Sulfates, total [as SO4] | daily minimum | report only (mg/L) | all year | 002 |
| Sulfates, total [as SO4] | 30-day average | report only (mg/L) | all year | 002 |
| Sulfates, total [as SO4] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfates, total [as SO4] | minimum | report only (mg/L) | all year | 002 |
| Sulfates, total [as SO4] | average | report only (mg/L) | all year | 002 |
| Sulfates, total [as SO4] | maximum | report only (mg/L) | all year | 002 |
| Phenolic compounds, unchlorinated | daily minimum | report only (mg/L) | all year | 002 |
| Phenolic compounds, unchlorinated | 30-day average | report only (mg/L) | all year | 002 |
| Phenolic compounds, unchlorinated | daily maximum | report only (mg/L) | all year | 002 |
| Phenolic compounds, unchlorinated | 30-day average | report only (lb/d) | all year | 002 |
| Phenolic compounds, unchlorinated | daily maximum | report only (lb/d) | all year | 002 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 002 |
| Toxic Units Static 48HR Acute Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | all year | 002 |
| TU LC50 Static Renewal 96Hr Acute Pimephales promelas | daily maximum | ≤ 1 tox acute | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 939.1 lb/d | all year | 003 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 349.53 lb/d | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 1701.2 lb/d | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 629.16 lb/d | all year | 003 |
| Oxygen demand, chem. [COD], dissolved | 30-day average | ≤ 2440.37 lb/d | all year | 003 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | ≤ 4702.79 lb/d | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 279.63 lb/d | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 762 lb/d | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 438.5 lb/d | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 1188.9 lb/d | all year | 003 |
| Oil & Grease | 30-day average | ≤ 281.2 lb/d | all year | 003 |
| Oil & Grease | 30-day average | ≤ 101.68 lb/d | all year | 003 |
| Oil & Grease | daily maximum | ≤ 539.1 lb/d | all year | 003 |
| Oil & Grease | daily maximum | ≤ 190.65 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 190.7 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 190.65 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 419.4 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 419.44 lb/d | all year | 003 |
| Sulfide, total [as S] | 30-day average | ≤ 1.84 lb/d | all year | 003 |
| Sulfide, total [as S] | 30-day average | ≤ 1.8 lb/d | all year | 003 |
| Sulfide, total [as S] | daily maximum | ≤ 4.13 lb/d | all year | 003 |
| Sulfide, total [as S] | daily maximum | ≤ 4.1 lb/d | all year | 003 |
| Chromium, hexavalent [as Cr] | 30-day average | ≤ .206 lb/d | all year | 003 |
| Chromium, hexavalent [as Cr] | 30-day average | ≤ .8 lb/d | all year | 003 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .465 lb/d | all year | 003 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 1.9 lb/d | all year | 003 |
| Chromium, total [as Cr] | 30-day average | ≤ 11.9 lb/d | all year | 003 |
| Chromium, total [as Cr] | 30-day average | ≤ 2.539 lb/d | all year | 003 |
| Chromium, total [as Cr] | daily maximum | ≤ 23.3 lb/d | all year | 003 |
| Chromium, total [as Cr] | daily maximum | ≤ 7.269 lb/d | all year | 003 |
| Phenolic compounds, unchlorinated | 30-day average | ≤ 2.142 lb/d | all year | 003 |
| Phenolic compounds, unchlorinated | 30-day average | ≤ 5.9 lb/d | all year | 003 |
| Phenolic compounds, unchlorinated | daily maximum | ≤ 8.886 lb/d | all year | 003 |
| Phenolic compounds, unchlorinated | daily maximum | ≤ 16.7 lb/d | all year | 003 |
| Chemical Oxygen Demand [COD] | 30-day average | ≤ 6460.4 lb/d | all year | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 12742.8 lb/d | all year | 003 |
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year | 006 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 25 mg/L | all year | 006 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 006 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 006 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 006 |
| Oxygen demand, chem. [COD], dissolved | daily minimum | report only (mg/L) | all year | 006 |
| Oxygen demand, chem. [COD], dissolved | 30-day average | report only (mg/L) | all year | 006 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (mg/L) | all year | 006 |
| Oxygen demand, chem. [COD], dissolved | 30-day average | report only (lb/d) | all year | 006 |
| Oxygen demand, chem. [COD], dissolved | daily maximum | report only (lb/d) | all year | 006 |
| pH | minimum | ≥ 6.5 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | daily minimum | report only (mg/L) | all year | 006 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 006 |
| Solids, total suspended | 30-day average | report only (lb/d) | all year | 006 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 006 |
| Oil & Grease | daily minimum | report only (mg/L) | all year | 006 |
| Oil & Grease | 30-day average | report only (mg/L) | all year | 006 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 006 |
| Oil & Grease | 30-day average | report only (lb/d) | all year | 006 |
| Oil & Grease | daily maximum | report only (lb/d) | all year | 006 |
| Nitrogen, total [as N] | minimum | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (lb/d) | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 006 |
| Phosphorus, total [as P] | minimum | report only (mg/L) | all year | 006 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 006 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | daily minimum | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | 30-day average | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | 30-day average | report only (lb/d) | all year | 006 |
| Sulfide, total [as S] | daily maximum | report only (lb/d) | all year | 006 |
| Chloride [as Cl] | minimum | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 006 |
| Chromium, hexavalent [as Cr] | daily minimum | report only (mg/L) | all year | 006 |
| Chromium, hexavalent [as Cr] | 30-day average | report only (mg/L) | all year | 006 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 006 |
| Chromium, hexavalent [as Cr] | 30-day average | report only (lb/d) | all year | 006 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (lb/d) | all year | 006 |
| Chromium, total [as Cr] | daily minimum | report only (mg/L) | all year | 006 |
| Chromium, total [as Cr] | 30-day average | report only (mg/L) | all year | 006 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 006 |
| Chromium, total [as Cr] | 30-day average | report only (lb/d) | all year | 006 |
| Chromium, total [as Cr] | daily maximum | report only (lb/d) | all year | 006 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Flow, total | total | report only (Mgal) | all year | 006 |
| Sulfates, total [as SO4] | minimum | report only (mg/L) | all year | 006 |
| Sulfates, total [as SO4] | 30-day average | ≤ 38308 mg/L | all year | 006 |
| Sulfates, total [as SO4] | daily maximum | ≤ 52642 mg/L | all year | 006 |
| Phenolic compounds, unchlorinated | daily minimum | report only (mg/L) | all year | 006 |
| Phenolic compounds, unchlorinated | 30-day average | report only (mg/L) | all year | 006 |
| Phenolic compounds, unchlorinated | daily maximum | report only (mg/L) | all year | 006 |
| Phenolic compounds, unchlorinated | 30-day average | report only (lb/d) | all year | 006 |
| Phenolic compounds, unchlorinated | daily maximum | report only (lb/d) | all year | 006 |
Cited limits by parameter: North Dakota's rules and the federal ones.
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