Passage Data · Check a report · Use it from your AI
Sewage treatment plant, Hermosa, South Dakota. NPDES permit SD0022349, in force until Jun 30, 2030. Last 12 months: no values over a limit, 12 required values missing, 10 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 90 deg F | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | May–Sep | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 630 #/100mL | May–Sep | 001 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 1178 #/100mL | May–Sep | 001 |
| Flow, total | monthly total | report only (Mgal) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Duration of discharge | monthly total | report only (d) | all year | 001 |
| Temperature, water deg. fahrenheit | value | report only (deg F) | Apr–Oct | 002 |
| Flow rate | value | report only (MGD) | Apr–Oct | 002 |
| Conductivity | value | report only (umho/cm) | Apr–Oct | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | Apr–Oct | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | Apr–Oct | 002 |
| pH | value | report only (SU) | Apr–Oct | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | Apr–Oct | 002 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | Apr–Oct | 002 |
| Nitrogen, nitrite total [as N] | value | report only (mg/L) | Apr–Oct | 002 |
| Nitrogen, nitrate total [as N] | value | report only (mg/L) | Apr–Oct | 002 |
| Phosphorus, total [as P] | value | report only (mg/L) | Apr–Oct | 002 |
| Sodium adsorption ratio | value | report only (Ratio) | Apr–Oct | 002 |
| Chloride [as Cl] | value | report only (mg/L) | Apr–Oct | 002 |
| Sulfate, total [as SO4] | value | report only (mg/L) | Apr–Oct | 002 |
| E. coli, colony forming units [CFU] | value | report only (#/100mL) | Apr–Oct | 002 |
| Flow, total | monthly total | report only (Mgal) | Apr–Oct | 002 |
| Duration of Land Application | monthly total | report only (d) | Apr–Oct | 002 |
| Solids, total dissolved | value | report only (mg/L) | Apr–Oct | 002 |
Cited limits by parameter: South Dakota's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/SD0022349 · MCP: https://passage-data.com/mcp