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Sewage treatment plant, major discharger, Hot Springs, South Dakota. NPDES permit SD0022918 expired Dec 31, 2017; its limits still apply. Last 12 months: no values over a limit, 1 of 23 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Flow rate | monthly maximum | report only (gal/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily minimum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| E. coli, colony forming units [CFU] | daily maximum | report only (#/100mL) | all year | 001 |
| Flow, total | monthly total | report only (Mgal) | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (tox acute) | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (pass=0;fail=1) | all year | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (tox acute) | all year | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (pass=0;fail=1) | all year | 001 |
| Duration of discharge | monthly total | report only (d) | all year | 001 |
| Oil and grease visual | value | report only (abst=0;prst=1) | all year | 001 |
| Report due [yrmoda] | value | < 1 Y=0;N=1 | all year | 001 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| Flow rate | 30-day average | report only (MGD) | all year | 005 |
| Flow rate | daily maximum | report only (MGD) | all year | 005 |
| Conductivity | 30-day average | report only (umho/cm) | all year | 005 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 005 |
| pH | daily minimum | report only (SU) | all year | 005 |
| pH | daily maximum | report only (SU) | all year | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, nitrite total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 005 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 005 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 005 |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year | 005 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | 30-day average | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 005 |
| Flow, total | monthly total | report only (Mgal) | all year | 005 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 005 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 005 |
| Coliform, fecal general | 30-day geometric mean | report only (#/100mL) | all year | 005 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 005 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 006 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 006 |
| Flow rate | 30-day average | report only (MGD) | all year | 006 |
| Flow rate | daily maximum | report only (MGD) | all year | 006 |
| Conductivity | 30-day average | report only (umho/cm) | all year | 006 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 006 |
| pH | daily minimum | report only (SU) | all year | 006 |
| pH | daily maximum | report only (SU) | 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, nitrite total [as N] | 30-day average | report only (mg/L) | all year | 006 |
| Nitrogen, nitrite total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 006 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 006 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | 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 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 006 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | 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 |
| Sulfate, total [as SO4] | 30-day average | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 006 |
| Flow, total | monthly total | report only (Mgal) | all year | 006 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 006 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 006 |
| Coliform, fecal general | 30-day geometric mean | report only (#/100mL) | all year | 006 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 006 |
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/SD0022918 · MCP: https://passage-data.com/mcp