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Sewage treatment plant, major discharger, Pierre, South Dakota. NPDES permit SD0020176, in force until Jun 30, 2027. Last 12 months: no values over a limit, 2 of 18 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| Flow rate | 30-day average | report only (MGD) | all year |
| Flow rate | daily maximum | report only (MGD) | all year |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year |
| Oxygen, dissolved [DO] | 30-day average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6.6 SU | all year |
| pH | daily maximum | ≤ 8.3 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Oil and grease, hexane extr method | daily maximum | ≤ 1 mg/L | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Cyanide, free [as free] | value | report only (ug/L) | all year |
| Cyanide, free [as free] | value | report only (ug/L) | all year |
| Cyanide, total [as CN] | value | report only (ug/L) | all year |
| Cyanide, total [as CN] | value | report only (ug/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | value | report only (mg/L) | all year |
| Arsenic, total recoverable | value | report only (ug/L) | all year |
| Arsenic, total recoverable | value | report only (ug/L) | all year |
| Thallium, total recoverable | value | report only (ug/L) | all year |
| Thallium, total recoverable | value | report only (ug/L) | all year |
| Selenite, Total Recoverable | value | report only (ug/L) | all year |
| Selenite, Total Recoverable | value | report only (ug/L) | all year |
| Beryllium, total recoverable [as Be] | value | report only (ug/L) | all year |
| Beryllium, total recoverable [as Be] | value | report only (ug/L) | all year |
| Nickel, total recoverable | value | report only (ug/L) | all year |
| Nickel, total recoverable | value | report only (ug/L) | all year |
| Silver total recoverable | value | report only (ug/L) | all year |
| Silver total recoverable | value | report only (ug/L) | all year |
| Zinc, total recoverable | value | report only (ug/L) | all year |
| Zinc, total recoverable | value | report only (ug/L) | all year |
| Aluminum, total recoverable | value | report only (ug/L) | all year |
| Aluminum, total recoverable | value | report only (ug/L) | all year |
| Cadmium, total recoverable | value | report only (ug/L) | all year |
| Cadmium, total recoverable | value | report only (ug/L) | all year |
| Lead, total recoverable | value | report only (ug/L) | all year |
| Lead, total recoverable | value | report only (ug/L) | all year |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year |
| Chromium, total recoverable | value | report only (ug/L) | all year |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year |
| Copper, total recoverable | value | report only (ug/L) | all year |
| Molybdenum, total recoverable | value | report only (ug/L) | all year |
| Molybdenum, total recoverable | value | report only (ug/L) | all year |
| Antimony, total recoverable | value | report only (ug/L) | all year |
| Antimony, total recoverable | value | report only (ug/L) | all year |
| Phenols | value | report only (ug/L) | all year |
| Phenols | value | report only (ug/L) | all year |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 126 #/100mL | May–Sep |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 #/100mL | May–Sep |
| Selenate, Total Recoverable | value | report only (ug/L) | all year |
| Selenate, Total Recoverable | value | report only (ug/L) | all year |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | < 1 tox acute | all year |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | < 1 tox acute | all year |
| Mercury, total [as Hg] | value | report only (ug/L) | all year |
| Mercury, total [as Hg] | value | report only (ug/L) | all year |
| Coliform, total general | 30-day geometric mean | ≤ 5000 #/100mL | all year |
| Coliform, total general | daily maximum | ≤ 20000 #/100mL | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Oil and grease visual | daily maximum | ≤ 0 abst=0;prst=1 | all year |
| Report due [yrmoda] | value | report only (Y=0;N=1) | all year |
| Report due [yrmoda] | value | report only (Y=0;N=1) | all year |
| Report due [yrmoda] | value | report only (Y=0;N=1) | all year |
Cited limits by parameter: South 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/SD0020176 · MCP: https://passage-data.com/mcp