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Sewerage Systems, Porter, Texas. NPDES permit TX0118311, in force until Oct 11, 2027. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Chlorine, total residual, monthly minimum | .3 mg/L | ≥ 1 mg/L | 70% |
| March 2026 | pH, minimum | 5.8 SU | ≥ 6 SU | — |
| April 2026 | Chlorine, total residual, monthly maximum | 4.3 mg/L | ≤ 4 mg/L | 8% |
| April 2026 | Chlorine, total residual, monthly minimum | .8 mg/L | ≥ 1 mg/L | 20% |
| August 2026 | Flow, in conduit or thru treatment plant, daily average | 32.484 MGD | ≤ .365 MGD | 8800% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 4 mg/L | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily average | ≤ 15 mg/L | all year |
| Solids, total suspended | single grab sample | ≤ 60 mg/L | all year |
| Solids, total suspended | daily average | ≤ 45 lb/d | all year |
| Nitrogen, ammonia total [as N] | daily average | ≤ 3 mg/L | all year |
| Nitrogen, ammonia total [as N] | single grab sample | ≤ 15 mg/L | all year |
| Nitrogen, ammonia total [as N] | daily average | ≤ 9.1 lb/d | all year |
| Flow, in conduit or thru treatment plant | daily average | ≤ .365 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly minimum | ≥ 1 mg/L | all year |
| Chlorine, total residual | monthly maximum | ≤ 4 mg/L | all year |
| E. coli | daily average | ≤ 63 MPN/100mL | all year |
| E. coli | single grab sample | ≤ 200 MPN/100mL | all year |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 10 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | single grab sample | ≤ 35 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 30 lb/d | all year |
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/TX0118311 · MCP: https://passage-data.com/mcp