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Sewage treatment plant, Sheridan, Arkansas. NPDES permit AR0034347 expired Feb 28, 2025; its limits still apply. Last 12 months: over a limit 3 times (last July 2026), 9 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| March 2026 | 002 | Nitrogen, ammonia total [as N], monthly average | 12.9 mg/L | ≤ 10 mg/L | 29% |
| June 2026 | 002 | pH, maximum | 10.2 SU | ≤ 10 SU | — |
| July 2026 | 001 | Oxygen, dissolved [DO], instantaneous minimum | 1.62 mg/L | ≥ 5 mg/L | 68% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Streamflow | minimum | ≥ 6.5 MGD | Mar–Dec | 001 |
| Streamflow | minimum | ≥ 3.2 MGD | Jan, Feb | 001 |
| Stream flow, instantaneous | monthly average | report only (MGD) | all year | 001 |
| Stream flow, instantaneous | daily maximum | report only (MGD) | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | May–Oct | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | Jan, Feb | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | Mar, Apr, Nov, Dec | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 10 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12 mg/L | Jan, Feb | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 18 mg/L | Jan, Feb | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 15 mg/L | Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | May–Oct | 001 |
| Discharge flow as % of stream flow | maximum | ≤ 20 % | Mar–Dec | 001 |
| Discharge flow as % of stream flow | maximum | ≤ 30 % | Jan, Feb | 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 |
| 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 |
| Overflows | monthly total | report only (occur/mo) | 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 | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 001 |
| Streamflow | minimum | ≥ 9 MGD | Mar–May | 002 |
| Streamflow | minimum | ≥ 4.5 MGD | Jan, Feb, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 002 |
| Streamflow | monthly average | report only (MGD) | all year | 002 |
| Streamflow | daily maximum | report only (MGD) | all year | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 4 mg/L | Jan, Feb | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 3 mg/L | Mar, Apr, May, Oct, Nov, Dec | 002 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 2 mg/L | Jun–Sep | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 10 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12 mg/L | Jan, Feb | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | Mar, Apr, May, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | Jun–Sep | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 18 mg/L | Jan, Feb | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 15 mg/L | Mar, Apr, May, Oct, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 6 mg/L | Jun–Sep | 002 |
| Discharge flow as % of stream flow | maximum | ≤ 10 % | Mar–May | 002 |
| Discharge flow as % of stream flow | maximum | ≤ 20 % | Jan, Feb, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 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 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | May–Sep | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Sep | 002 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 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 | ≤ 25 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 40 mg/L | all year | 002 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Mar–Jun | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jul–Dec | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Mar–Jun | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jul–Dec | TX1 |
| 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/AR0034347 · MCP: https://passage-data.com/mcp