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Sewage treatment plant, major discharger, Bentonville, Arkansas. NPDES permit AR0050024, in force until Dec 31, 2026. Last 12 months: over a limit 36 times (last August 2026), 16 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Nitrogen, ammonia total [as N], 7-day average | 4.6 mg/L | ≤ 3 mg/L | 53% |
| October 2025 | Nitrogen, ammonia total [as N], monthly average | 2.4 mg/L | ≤ 2 mg/L | 20% |
| October 2025 | Nitrogen, ammonia total [as N], monthly average | 78 lb/d | ≤ 60 lb/d | 30% |
| October 2025 | Phosphorus, total [as P], 7-day average | 4.8 mg/L | ≤ .15 mg/L | 3100% |
| October 2025 | Phosphorus, total [as P], monthly average | 2.02 mg/L | ≤ .1 mg/L | 1920% |
| October 2025 | Phosphorus, total [as P], monthly average | 64.52 lb/d | ≤ 3 lb/d | 2051% |
| November 2025 | Phosphorus, total [as P], 7-day average | .79 mg/L | ≤ .15 mg/L | 427% |
| November 2025 | Phosphorus, total [as P], monthly average | .41 mg/L | ≤ .1 mg/L | 310% |
| November 2025 | Phosphorus, total [as P], monthly average | 11.1 lb/d | ≤ 3 lb/d | 270% |
| December 2025 | Phosphorus, total [as P], 7-day average | 1.7 mg/L | ≤ .15 mg/L | 1033% |
| December 2025 | Phosphorus, total [as P], monthly average | .93 mg/L | ≤ .1 mg/L | 830% |
| December 2025 | Phosphorus, total [as P], monthly average | 30.7 lb/d | ≤ 3 lb/d | 923% |
| January 2026 | Phosphorus, total [as P], 7-day average | 3.2 mg/L | ≤ .15 mg/L | 2033% |
| January 2026 | Phosphorus, total [as P], monthly average | 1.53 mg/L | ≤ .1 mg/L | 1430% |
| January 2026 | Phosphorus, total [as P], monthly average | 49.81 lb/d | ≤ 3 lb/d | 1560% |
| February 2026 | Phosphorus, total [as P], monthly average | 1.04 mg/L | ≤ .1 mg/L | 940% |
| February 2026 | Phosphorus, total [as P], monthly average | 33.2 lb/d | ≤ 3 lb/d | 1007% |
| March 2026 | Oxygen, dissolved [DO], instantaneous minimum | 6.95 mg/L | ≥ 7 mg/L | 1% |
| March 2026 | Phosphorus, total [as P], 7-day average | 2.08 mg/L | ≤ .15 mg/L | 1287% |
| March 2026 | Phosphorus, total [as P], monthly average | .85 mg/L | ≤ .1 mg/L | 750% |
| March 2026 | Phosphorus, total [as P], monthly average | 36.68 lb/d | ≤ 3 lb/d | 1123% |
| April 2026 | Phosphorus, total [as P], 7-day average | .93 mg/L | ≤ .15 mg/L | 520% |
| April 2026 | Phosphorus, total [as P], monthly average | .59 mg/L | ≤ .1 mg/L | 490% |
| April 2026 | Phosphorus, total [as P], monthly average | 22.2 lb/d | ≤ 3 lb/d | 640% |
| May 2026 | Phosphorus, total [as P], 7-day average | .19 mg/L | ≤ .15 mg/L | 27% |
| May 2026 | Phosphorus, total [as P], monthly average | .16 mg/L | ≤ .1 mg/L | 60% |
| May 2026 | Phosphorus, total [as P], monthly average | 6.02 lb/d | ≤ 3 lb/d | 101% |
| June 2026 | Phosphorus, total [as P], 7-day average | .37 mg/L | ≤ .15 mg/L | 147% |
| June 2026 | Phosphorus, total [as P], monthly average | .23 mg/L | ≤ .1 mg/L | 130% |
| June 2026 | Phosphorus, total [as P], monthly average | 8.66 lb/d | ≤ 3 lb/d | 189% |
| July 2026 | Phosphorus, total [as P], 7-day average | 3.71 mg/L | ≤ .15 mg/L | 2373% |
| July 2026 | Phosphorus, total [as P], monthly average | 2.53 mg/L | ≤ .1 mg/L | 2430% |
| July 2026 | Phosphorus, total [as P], monthly average | 79.23 lb/d | ≤ 3 lb/d | 2541% |
| August 2026 | Phosphorus, total [as P], 7-day average | 6.14 mg/L | ≤ .15 mg/L | 3993% |
| August 2026 | Phosphorus, total [as P], monthly average | 127.48 lb/d | ≤ 3 lb/d | 4149% |
| August 2026 | Phosphorus, total [as P], monthly average | 4.13 mg/L | ≤ .1 mg/L | 4030% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | May–Oct | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | May–Oct | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 22.5 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 450.4 lb/d | all year | 001 |
| Solids, total suspended | monthly average | ≤ 900.7 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 3 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 60 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 120.1 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 120.1 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 240.2 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | 7-day average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | 7-day average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .1 mg/L | all year | 001 |
| Phosphorus, total [as P] | rolling average | ≤ .35 mg/L | all year | 001 |
| Phosphorus, total [as P] | 7-day average | ≤ .15 mg/L | all year | 001 |
| Phosphorus, total [as P] | 7-day average | ≤ .525 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 3 lb/d | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 21 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Sep | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Sep | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Sep | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Sep | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Overflows | monthly total | report only (occur/mo) | all year | 001 |
| Overflows | monthly total | report only (occur/mo) | all year | 001 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 001 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 300.2 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 600.5 lb/d | all year | 001 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 01A |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 01A |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 01A |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 01A |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 01B |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 01B |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 01B |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 01B |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
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/AR0050024 · MCP: https://passage-data.com/mcp