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Sewage treatment plant, Greenbrier, Arkansas. NPDES permit AR0036536, in force until Jun 30, 2029. Last 12 months: over a limit 3 times (last August 2026), 16 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | pH, minimum | 5.7 SU | ≥ 6 SU | — |
| January 2026 | BOD, carbonaceous [5 day, 20 C], 7-day average | 15.2 mg/L | ≤ 15 mg/L | 1% |
| August 2026 | pH, maximum | 9.49 SU | ≤ 9 SU | — |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 3 mg/L | May–Oct |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 3 mg/L | May–Oct |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 15 mg/L | 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 | 7-day average | ≤ 22.5 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 122.6 lb/d | all year |
| Solids, total suspended | monthly average | ≤ 122.6 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.5 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.5 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.5 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9.8 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.5 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 9.8 mg/L | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.6 mg/L | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24.5 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 53.1 lb/d | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 45.8 lb/d | Apr |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24.5 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 53.1 lb/d | Jan, Feb, Mar, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 45.8 lb/d | Apr |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| 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 |
| 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 | ≤ 200 #/100mL | May–Sep |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Sep |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Sep |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Sep |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Overflows | monthly total | report only (occur/mo) | all year |
| Overflows | monthly total | report only (occur/mo) | all year |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | 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] | 7-day average | ≤ 15 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 81.7 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 81.7 lb/d | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Chlorine, total residual, instantaneous maximum | 0.011 mg/L | new | — | — |
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/AR0036536 · MCP: https://passage-data.com/mcp