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Sewage treatment plant, major discharger, Richwood, Texas. NPDES permit TX0034436, in force until Feb 17, 2027. Last 12 months: over a limit 6 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 10892 gal/min | ≤ 9722 gal/min | 12% |
| February 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 10275 gal/min | ≤ 9722 gal/min | 6% |
| May 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 15567 gal/min | ≤ 9722 gal/min | 60% |
| June 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 14908 gal/min | ≤ 9722 gal/min | 53% |
| July 2026 | BOD, carbonaceous [5 day, 20 C], daily average | 5.5 mg/L | ≤ 5 mg/L | 10% |
| July 2026 | Flow, in conduit or thru treatment plant, 2-hour peak | 11733 gal/min | ≤ 9722 gal/min | 21% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 6 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 5 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 167 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1.6 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 53 lb/d | all year | 001 |
| Flow, in conduit or thru treatment plant | daily 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 | 2-hour peak | ≤ 9722 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 4 MGD | all year | 001 |
| Chlorine, total residual | instantaneous maximum | < .1 mg/L | all year | 001 |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year | 001 |
| E. coli | daily average | ≤ 126 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 399 CFU/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 5 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 167 lb/d | all year | 001 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average 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 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average 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 Ceriodaphnia dubia | monthly average 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 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | monthly average 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 Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average 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 Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | single sample | report only (pass=0;fail=1) | all year | TXA |
Cited limits by parameter: Texas'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/TX0034436 · MCP: https://passage-data.com/mcp