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Sewage treatment plant, Hoxie, Arkansas. NPDES permit AR0020141 expired Apr 30, 2025; its limits still apply. Last 12 months: over a limit 23 times (last August 2026), 19 required values missing, 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrogen, ammonia total [as N], 7-day average | 9.4 mg/L | ≤ 9 mg/L | 4% |
| October 2025 | Nitrogen, ammonia total [as N], monthly average | 8.9 mg/L | ≤ 6 mg/L | 48% |
| November 2025 | BOD, carbonaceous [5 day, 20 C], 7-day average | 26 mg/L | ≤ 22.5 mg/L | 16% |
| November 2025 | Solids, total suspended, 7-day average | 69 mg/L | ≤ 30 mg/L | 130% |
| November 2025 | Solids, total suspended, monthly average | < 35 mg/L | ≤ 20 mg/L | 75% |
| December 2025 | BOD, carbonaceous [5 day, 20 C], 7-day average | 23.7 mg/L | ≤ 22.5 mg/L | 5% |
| December 2025 | Nitrogen, ammonia total [as N], 7-day average | 20.5 mg/L | ≤ 14.7 mg/L | 39% |
| December 2025 | Solids, total suspended, 7-day average | 53 mg/L | ≤ 30 mg/L | 77% |
| December 2025 | Solids, total suspended, monthly average | 27 mg/L | ≤ 20 mg/L | 35% |
| December 2025 | Solids, total suspended, monthly average | 75.08 lb/d | ≤ 68.4 lb/d | 10% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 23.1 mg/L | ≤ 22.5 mg/L | 3% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 17.1 mg/L | ≤ 15 mg/L | 14% |
| February 2026 | Solids, total suspended, 7-day average | 66 mg/L | ≤ 30 mg/L | 120% |
| February 2026 | Solids, total suspended, monthly average | 44.5 mg/L | ≤ 20 mg/L | 123% |
| June 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 24.2 mg/L | ≤ 22.5 mg/L | 8% |
| June 2026 | Solids, total suspended, 7-day average | 48 mg/L | ≤ 30 mg/L | 60% |
| June 2026 | Solids, total suspended, monthly average | 30 mg/L | ≤ 20 mg/L | 50% |
| July 2026 | Nitrogen, ammonia total [as N], 7-day average | 10.2 mg/L | ≤ 9 mg/L | 13% |
| July 2026 | Nitrogen, ammonia total [as N], 7-day average | 10.2 mg/L | ≤ 9 mg/L | 13% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 9.3 mg/L | ≤ 6 mg/L | 55% |
| July 2026 | Nitrogen, ammonia total [as N], monthly average | 9.3 mg/L | ≤ 6 mg/L | 55% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | 6.8 mg/L | ≤ 6 mg/L | 13% |
| August 2026 | Solids, total suspended, monthly average | 68.83 lb/d | ≤ 68.4 lb/d | 1% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 2 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 | ≤ 20 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 68.4 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 14.7 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 17.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 41.1 lb/d | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20.6 lb/d | May–Oct |
| 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 |
| Chlorine, total residual | instantaneous maximum | report only (mg/L) | all year |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | all year |
| Overflows | monthly total | report only (occur/mo) | all year |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 22.5 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 51.3 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/AR0020141 · MCP: https://passage-data.com/mcp