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Sewage treatment plant, major discharger, Heber Springs, Arkansas. NPDES permit AR0022381, in force until Jun 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 2 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 291.9 lb/d | 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 | ≤ 291.9 lb/d | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | 7-day average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | 7-day average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | 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 |
| 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 |
| Streamflow | minimum | ≥ 90 cfs | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Streamflow | minimum | ≥ 99999999 cfs | May–Oct | 003 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 2 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 99999999 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 0 lb/d | May–Oct | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 291.9 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| pH | minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| pH | minimum | ≥ 99999999 SU | May–Oct | 003 |
| pH | maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| pH | maximum | ≤ 0 SU | May–Oct | 003 |
| Solids, total suspended | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| Solids, total suspended | 7-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| Solids, total suspended | 7-day average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, total suspended | monthly average | ≤ 0 lb/d | May–Oct | 003 |
| Solids, total suspended | monthly average | ≤ 291.9 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| Nitrite + Nitrate total [as N] | 7-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Nitrite + Nitrate total [as N] | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 0 lb/d | May–Oct | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | monthly average | ≤ 0 mg/L | May–Oct | 003 |
| Phosphorus, total [as P] | 7-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | 7-day average | ≤ 0 mg/L | May–Oct | 003 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Phosphorus, total [as P] | monthly average | ≤ 0 lb/d | May–Oct | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 0 MGD | May–Oct | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | May–Oct | 003 |
| Coliform, fecal general | 30-day geometric mean | ≤ 0 #/100mL | May–Oct | 003 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Coliform, fecal general | 7-day geometric mean | ≤ 0 #/100mL | May–Oct | 003 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Overflows | monthly total | report only (occur/mo) | all year | 003 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (gal) | all year | 003 |
| BOD, 5-day, percent removal | monthly average | ≤ 99999999 % | May–Oct | 003 |
| BOD, 5-day, percent removal | monthly average | ≤ 85 % | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, suspended percent removal | monthly average | ≤ 85 % | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Solids, suspended percent removal | monthly average | ≤ 99999999 % | May–Oct | 003 |
| 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 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | Jan, Feb, Mar, Apr, Nov, Dec | TX3 |
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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