NPDES permit AR0000850 · Minor NON-POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19
Check this month's numbers before you fileLast period with anything received: 2026-08-31. Most often over: Whole Effluent Toxicity [WET] - C. dubia (1).
Reports are due about 25 days after each monitoring period ends (the most common figure among AR permits in EPA's filings — check your permit).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 002 | Temperature, water deg. fahrenheit | INST MAX | <= 86 deg F | all year |
| 002 | Oxygen demand, chem. [low level] [COD] | MO AVG | <= 50 mg/L | all year |
| 002 | Oxygen demand, chem. [low level] [COD] | DAILY MX | <= 75 mg/L | all year |
| 002 | Oxygen demand, chem. [low level] [COD] | MO AVG | <= 64.6 lb/d | all year |
| 002 | Oxygen demand, chem. [low level] [COD] | DAILY MX | <= 97 lb/d | all year |
| 002 | pH | MINIMUM | >= 6 SU | all year |
| 002 | pH | MAXIMUM | <= 9 SU | all year |
| 002 | Solids, total suspended | MO AVG | <= 15 mg/L | all year |
| 002 | Solids, total suspended | DAILY MX | <= 22.5 mg/L | all year |
| 002 | Solids, total suspended | MO AVG | <= 19.4 lb/d | all year |
| 002 | Solids, total suspended | DAILY MX | <= 29.1 lb/d | all year |
| 002 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 002 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| TX2 | WET, sublethal retest #1 | 7 DA MIN | report only | May, Jun, Jul, Aug, Sep, Oct |
| TX2 | WET, sublethal retest #2 | 7 DA MIN | report only | May, Jun, Jul, Aug, Sep, Oct |
| TX2 | Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7 DA MIN | report only | May, Jun, Jul, Aug, Sep, Oct |
| TX2 | Whole Effluent Toxicity [WET] - C. dubia | 7 DA MIN | >= 100 % | May, Jun, Jul, Aug, Sep, Oct |
| TX2 | Whole Effluent Toxicity [WET] - C. dubia | 7 DA MIN | >= 32 % | Jan, Feb, Mar, Apr, Nov, Dec |
| TX2 | Whole Effluent Toxicity [WET] - C. dubia | 7 DA MIN | >= 80 % | May, Jun, Jul, Aug, Sep, Oct |
| TX2 | Whole Effluent Toxicity [WET] - C. dubia | 7 DA MIN | >= 32 % | Jan, Feb, Mar, Apr, Nov, Dec |
| TX2 | Whole Effluent Toxicity [WET] - P. promelas | 7 DA MIN | >= 32 % | Jan, Feb, Mar, Apr, Nov, Dec |
| TX2 | Whole Effluent Toxicity [WET] - P. promelas | 7 DA MIN | >= 32 % | Jan, Feb, Mar, Apr, Nov, Dec |
| TX2 | Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7 DA MIN | report only | all year |
| TX2 | Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7 DA MIN | report only | all year |
| TX2 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7 DA MIN | report only | all year |
| TX2 | Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7 DA MIN | report only | all year |
| TX2 | NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7 DA MIN | report only | all year |
| TX2 | NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7 DA MIN | report only | all year |
| TX2 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7 DA MIN | report only | all year |
| TX2 | NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7 DA MIN | report only | all year |
| TX2 | Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7 DA MIN | report only | all year |
| TX2 | Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7 DA MIN | report only | all year |
Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states