Passage Data · Check a report · Use it from your AI
Sewage treatment plant, Elkton, South Dakota. NPDES permit SD0020788 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 17 required values missing, 2 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| Flow rate | 30-day average | report only (MGD) | all year | 002 |
| Flow rate | daily maximum | report only (MGD) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 90 mg/L | all year | 002 |
| Solids, total suspended | maximum 7-day average | ≤ 135 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | May–Oct | 002 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 630 #/100mL | May–Sep | 002 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 1178 #/100mL | May–Sep | 002 |
| Flowing, Receiving Stream | daily maximum | report only (N=0;Y=1) | all year | 002 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Flow rate | 30-day average | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | ≤ .323 MGD | all year | 003 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 90 mg/L | all year | 003 |
| Solids, total suspended | maximum 7-day average | ≤ 135 mg/L | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.4 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 630 #/100mL | May–Sep | 003 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 1178 #/100mL | May–Sep | 003 |
| Flow, total | monthly total | report only (Mgal) | all year | 003 |
| Flowing, Receiving Stream | daily maximum | report only (N=0;Y=1) | all year | 003 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | all year | 003 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | all year | 003 |
| Duration of discharge | monthly total | report only (d) | all year | 003 |
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/SD0020788 · MCP: https://passage-data.com/mcp