Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Houston, Texas. NPDES permit TX0063053, in force until Aug 4, 2031. Last 12 months: over a limit once (last March 2026), 1 of 18 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | E. coli, daily maximum | 727 MPN/100mL | ≤ 399 MPN/100mL | 82% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 4 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 | ≤ 876 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 3 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 5 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 175 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 292 lb/d | Jan, Feb, Mar, Nov, Dec | 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 | ≤ 33056 gal/min | all year | 001 |
| Flow, in conduit or thru treatment plant | annual average | ≤ 7 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 | ≤ 63 MPN/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 200 MPN/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 584 lb/d | all year | 001 |
| Whole Effluent Toxicity [WET] - C. dubia | 7-day minimum | ≥ 63 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - C. dubia | monthly average minimum | ≥ 63 % | all year | TX1 |
| 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 |
|---|---|---|---|---|
| Nitrogen, ammonia total [as N], daily average | 3 mL/L | tighter | 1000 mL/L (12 values, 12 below detection) | check the permit |
| Nitrogen, ammonia total [as N], daily maximum | 7 mL/L | tighter | 2000 mL/L (12 values, 2 below detection) | check the permit |
Check the permit: no written limit or plant report supports these values of EPA's. Each is a nutrient limit under 0.0005 mg/L, a unit the parameter is not measured in, or a median over 1,000 times the limit. Read the permit before relying on it.
Cited limits by parameter: Texas's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/TX0063053 · MCP: https://passage-data.com/mcp