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Sewage treatment plant, major discharger, Prairie Grove, Arkansas. NPDES permit AR0022098 expired Nov 30, 2025; its limits still apply. Last 12 months: over a limit 16 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrogen, ammonia total [as N], 7-day average | 6.393 mg/L | ≤ 4.2 mg/L | 52% |
| December 2025 | Oxygen, dissolved [DO], instantaneous minimum | 6.2 mg/L | ≥ 7 mg/L | 11% |
| March 2026 | Oxygen, dissolved [DO], instantaneous minimum | 6.8 mg/L | ≥ 7 mg/L | 3% |
| April 2026 | Phosphorus, total [as P], 7-day average | 5.2 mg/L | ≤ .8 mg/L | 550% |
| April 2026 | Phosphorus, total [as P], monthly average | 9.3469 lb/d | ≤ 5.6 lb/d | 67% |
| May 2026 | Phosphorus, total [as P], 7-day average | 1.5 mg/L | ≤ .8 mg/L | 88% |
| July 2026 | Nitrite + Nitrate total [as N], instantaneous maximum | 13.5 mg/L | ≤ 10 mg/L | 35% |
| July 2026 | Nitrite + Nitrate total [as N], monthly average | 137.2 lb/d | ≤ 112.6 lb/d | 22% |
| July 2026 | Phosphorus, total [as P], 7-day average | 1.1 mg/L | ≤ .8 mg/L | 38% |
| July 2026 | Phosphorus, total [as P], monthly average | 14.8 lb/d | ≤ 5.6 lb/d | 164% |
| July 2026 | Phosphorus, total [as P], rolling average | .564 mg/L | ≤ .5 mg/L | 13% |
| August 2026 | Nitrite + Nitrate total [as N], instantaneous maximum | 23 mg/L | ≤ 10 mg/L | 130% |
| August 2026 | Nitrite + Nitrate total [as N], monthly average | 114.9 lb/d | ≤ 112.6 lb/d | 2% |
| August 2026 | Phosphorus, total [as P], 7-day average | 3.3 mg/L | ≤ .8 mg/L | 313% |
| August 2026 | Phosphorus, total [as P], rolling average | .63 mg/L | ≤ .5 mg/L | 26% |
| August 2026 | pH, minimum | 5.4 SU | ≥ 6 SU | — |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | May–Oct | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | May–Oct | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | May–Oct | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 112.6 lb/d | all year | 002 |
| Solids, total suspended | monthly average | ≤ 168.9 lb/d | all year | 002 |
| Solids, total suspended | monthly average | ≤ 168.9 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 7 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.3 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.8 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.3 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.7 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.8 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.3 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 10.5 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.3 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.3 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.2 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 10.5 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.6 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 4.2 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 10.5 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.6 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 52.5 lb/d | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 30 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 32.3 lb/d | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 19.1 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 65.3 lb/d | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 25.9 lb/d | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 19.1 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 65.3 lb/d | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 25.9 lb/d | Apr | 002 |
| Nitrite + Nitrate total [as N] | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 112.6 lb/d | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 002 |
| Phosphorus, total [as P] | rolling average | ≤ .5 mg/L | all year | 002 |
| Phosphorus, total [as P] | rolling average | ≤ .5 mg/L | all year | 002 |
| Phosphorus, total [as P] | 7-day average | ≤ 1.5 mg/L | all year | 002 |
| Phosphorus, total [as P] | 7-day average | ≤ .8 mg/L | all year | 002 |
| Phosphorus, total [as P] | 7-day average | ≤ .8 mg/L | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 7.5 lb/d | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 5.6 lb/d | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 5.6 lb/d | all year | 002 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | 7-day average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | 7-day average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | 7-day average | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Oct | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | all year | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | Apr–Sep | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Oct | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | all year | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Oct, Nov, Dec | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | Apr–Sep | 002 |
| Overflows | monthly total | report only (occur/mo) | all year | 002 |
| Overflows | monthly total | report only (occur/mo) | all year | 002 |
| Overflows | monthly total | report only (occur/mo) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 75.1 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 112.6 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 112.6 lb/d | all year | 002 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX2 |
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/AR0022098 · MCP: https://passage-data.com/mcp