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Sewage treatment plant, Haskell, Arkansas. NPDES permit AR0051713 expired Dec 31, 2024; its limits still apply. Last 12 months: over a limit 13 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Oxygen, dissolved [DO], instantaneous minimum | 4.1 mg/L | ≥ 5 mg/L | 18% |
| April 2026 | Nitrogen, ammonia total [as N], 7-day average | 8.5 mg/L | ≤ 6.1 mg/L | 39% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 6.4 mg/L | ≤ 6.1 mg/L | 5% |
| May 2026 | Coliform, fecal general, 7-day geometric mean | > 2400 #/100mL | ≤ 2000 #/100mL | — |
| May 2026 | Nitrogen, ammonia total [as N], 7-day average | 19 mg/L | ≤ 9.2 mg/L | 107% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 45.2 lb/d | ≤ 30.5 lb/d | 48% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 9.7 mg/L | ≤ 6.1 mg/L | 59% |
| July 2026 | Coliform, fecal general, 7-day geometric mean | 2400 #/100mL | ≤ 2000 #/100mL | 20% |
| July 2026 | Nitrogen, ammonia total [as N], 7-day average | 13 mg/L | ≤ 9.2 mg/L | 41% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 6.8 mg/L | ≤ 6.1 mg/L | 11% |
| August 2026 | Coliform, fecal general, 7-day geometric mean | > 2400 #/100mL | ≤ 2000 #/100mL | — |
| August 2026 | pH, minimum | 5.8 SU | ≥ 6 SU | — |
| September 2026 | pH, minimum | 4.7 SU | ≥ 6 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 3 mg/L | May–Oct |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 75.1 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.1 mg/L | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6.1 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9.2 mg/L | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 30.5 lb/d | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 30.5 lb/d | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Solids, total dissolved | monthly average | report only (mg/L) | all year |
| Solids, total dissolved | 7-day average | report only (mg/L) | all year |
| Solids, total dissolved | monthly average | report only (lb/d) | all year |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 50 lb/d | all year |
Cited limits by parameter: Arkansas'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/AR0051713 · MCP: https://passage-data.com/mcp