Passage Data · Check a report · Use it from your AI
Sewage treatment plant, Hartford, South Dakota. NPDES permit SD0021750 expired Dec 31, 2024; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Nitrogen, ammonia total [as N], 30-day average | 2.5 mg/L | ≤ 1 mg/L | 150% |
| June 2026 | Nitrogen, ammonia total [as N], 30-day average | 1.075 mg/L | ≤ 1 mg/L | 8% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 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 |
| 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 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.1 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.2 mg/L | May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.4 mg/L | Jun–Aug | 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 |
| Flowing, Receiving Stream | daily maximum | report only (N=0;Y=1) | all year | 001 |
| Duration of discharge | monthly total | report only (d) | all year | 001 |
| 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 | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1.8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 1 mg/L | Jun–Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.1 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4.2 mg/L | May, Sep, Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.4 mg/L | Jun–Aug | 002 |
| Phosphorus, total [as P] | 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 |
| Flow, total | monthly total | report only (Mgal) | all year | 002 |
| Flowing, Receiving Stream | daily maximum | report only (N=0;Y=1) | all year | 002 |
| Duration of discharge | monthly total | report only (d) | all year | 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/SD0021750 · MCP: https://passage-data.com/mcp