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Sewage treatment plant, major discharger, Denton County, Texas. NPDES permit TX0104957, in force until Apr 24, 2029. Last 12 months: no values over a limit, 8 required values missing, 9 of 40 reports late. Source: EPA ECHO, Oct 22, 2026.
| 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 | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 588 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1.4 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 1.6 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 55 lb/d | Jun–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 63 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 2 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily average | ≤ 7153.64 lb/yr | 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 | ≤ 19444 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 4.7 MGD | 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 | ≤ 196 lb/d | all year | 001 |
| Oxygen, dissolved [DO] | monthly minimum | ≥ 6 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 002 |
| Solids, total suspended | daily average | ≤ 1439 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2 mg/L | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 3 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 192 lb/d | Jun–Oct | 002 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 288 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| Phosphorus, total [as P] | daily average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | ≤ 2 mg/L | all year | 002 |
| Phosphorus, total [as P] | daily average | ≤ 17503.6 lb/yr | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | 2-hour peak | ≤ 17361 gal/min | all year | 002 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 11.5 MGD | all year | 002 |
| E. coli | daily average | ≤ 126 MPN/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 399 MPN/100mL | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 7 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 5 mg/L | Jun–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 22 mg/L | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | Jun–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 671 lb/d | Jan, Feb, Mar, Apr, May, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 480 lb/d | Jun–Oct | 002 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| 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 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Flow, in conduit or thru treatment plant, 2-hour peak outfall 001 | 16806 gal/min | tighter | 10330 gal/min (11 values) | 0.614× |
| Flow, in conduit or thru treatment plant, 2-hour peak outfall 002 | 16806 gal/min | tighter | 11040 gal/min (11 values) | 0.657× |
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/TX0104957 · MCP: https://passage-data.com/mcp