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Post Big Oak LLC

Sewerage Systems, Harrison County, Texas. NPDES permit TX0119113, in force until Sep 9, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 16 reports late

Limits in force (15)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 2 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Csingle grab sample≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 8.3 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 20 mg/Lall year
Solids, total suspendedsingle grab sample≤ 65 mg/Lall year
Solids, total suspendeddaily average≤ 8.3 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .05 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year
Chlorine, total residualmonthly maximum≤ 4 mg/Lall year
E. colidaily average≤ 126 CFU/100mLall year
E. colisingle grab sample≤ 399 CFU/100mLall year

How strict are these limits?

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/TX0119113 · MCP: https://passage-data.com/mcp