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Sewage treatment plant, major discharger, Sherwood, Arkansas. NPDES permit AR0037176, in force until Feb 28, 2030. Last 12 months: over a limit 5 times (last April 2026), 3 required values missing, 2 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Nitrogen, ammonia total [as N], 7-day average | 11.1 mg/L | ≤ 7.5 mg/L | 48% |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 6.3 mg/L | ≤ 5 mg/L | 26% |
| April 2026 | Nitrogen, ammonia total [as N], 7-day average | 19.1 mg/L | ≤ 5.6 mg/L | 241% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 10.5 mg/L | ≤ 2.2 mg/L | 377% |
| April 2026 | Nitrogen, ammonia total [as N], monthly average | 31.7 lb/d | ≤ 21.6 lb/d | 47% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 196 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.2 mg/L | Apr–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 5.6 mg/L | Apr–Oct | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 7.5 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 21.6 lb/d | Apr–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 49 lb/d | Jan, Feb, Mar, Nov, Dec | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Copper, total recoverable | 7-day average | report only (ug/L) | all year | 002 |
| Copper, total recoverable | monthly average | report only (lb/d) | 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 | daily maximum | report only (MGD) | all year | 002 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | 7-day average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | monthly average | report only (lb/d) | all year | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | 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 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 23 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 147 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
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