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Sewage treatment plant, major discharger, Pflugerville, Texas. NPDES permit TX0094927 expired Nov 13, 2025; its limits still apply. Last 12 months: over a limit 15 times (last April 2026), 2 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, carbonaceous [5 day, 20 C], daily maximum | 23 mg/L | ≤ 20 mg/L | 15% |
| October 2025 | Nitrogen, ammonia total [as N], daily average | 327.817 lb/d | ≤ 121 lb/d | 171% |
| October 2025 | Nitrogen, ammonia total [as N], daily average | 9.2 mg/L | ≤ 2 mg/L | 360% |
| October 2025 | Nitrogen, ammonia total [as N], daily maximum | 34.7 mg/L | ≤ 10 mg/L | 247% |
| October 2025 | Oxygen, dissolved [DO], monthly minimum | 5.59 mg/L | ≥ 6 mg/L | 7% |
| October 2025 | Phosphorus, total [as P], daily maximum | 5.6 mg/L | ≤ 4 mg/L | 40% |
| October 2025 | Solids, total suspended, daily maximum | 72 mg/L | ≤ 20 mg/L | 260% |
| December 2025 | Nitrogen, ammonia total [as N], daily average | 2.68 mg/L | ≤ 2 mg/L | 34% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 19.4 mg/L | ≤ 10 mg/L | 94% |
| December 2025 | Solids, total suspended, daily maximum | 25 mg/L | ≤ 20 mg/L | 25% |
| January 2026 | Nitrogen, ammonia total [as N], daily average | 166.455 lb/d | ≤ 121 lb/d | 38% |
| January 2026 | Nitrogen, ammonia total [as N], daily average | 4.75 mg/L | ≤ 2 mg/L | 138% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 21.5 mg/L | ≤ 10 mg/L | 115% |
| March 2026 | BOD, carbonaceous [5 day, 20 C], daily average | 5.29 mg/L | ≤ 5 mg/L | 6% |
| April 2026 | BOD, carbonaceous [5 day, 20 C], daily average | 5.1 mg/L | ≤ 5 mg/L | 2% |
| 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 | ≤ 302 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 121 lb/d | all year | 001 |
| Phosphorus, total [as P] | daily average | ≤ .8 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily average | ≤ 48 lb/d | all year | 001 |
| Chloride [as Cl] | daily average | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily average | report only (lb/d) | all year | 001 |
| Sulfate, total [as SO4] | daily average | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily average | report only (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 | ≤ 17306 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 7.25 MGD | all year | 001 |
| E. coli | daily average | ≤ 120 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 379 CFU/100mL | all year | 001 |
| Solids, total dissolved | daily average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily average | report only (lb/d) | 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 | ≤ 302 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 | 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 | 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/TX0094927 · MCP: https://passage-data.com/mcp