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Sewerage Systems, Houston, Texas. NPDES permit TX0027707, in force until Mar 3, 2028. Last 12 months: over a limit once (last June 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Flow, in conduit or thru treatment plant, daily average | .113 MGD | ≤ .1 MGD | 13% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | monthly minimum | ≥ 4 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily average | ≤ 10 mg/L | all year |
| BOD, 5-day, 20 deg. C | single grab sample | ≤ 35 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily average | ≤ 8.3 lb/d | 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 | ≤ 13 lb/d | all year |
| Nitrogen, ammonia total [as N] | daily average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | single grab sample | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily average | report only (lb/d) | all year |
| Flow, in conduit or thru treatment plant | daily average | ≤ .1 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 |
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/TX0027707 · MCP: https://passage-data.com/mcp