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Montgomery County Mud 138

Sewerage Systems, Montgomery County, Texas. NPDES permit TX0126101, in force until Jun 23, 2027. Last 12 months: over a limit 7 times (last August 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Renewal application due
Dec 25, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], single grab sample25.8 mg/L≤ 15 mg/L72%
October 2025Oxygen, dissolved [DO], monthly minimum5.65 mg/L≥ 6 mg/L6%
November 2025E. coli, daily average> 2420 MPN/100mL≤ 126 MPN/100mL—
November 2025E. coli, single grab sample> 2420 MPN/100mL≤ 399 MPN/100mL—
March 2026Oxygen, dissolved [DO], monthly minimum5.91 mg/L≥ 6 mg/L2%
July 2026Solids, total suspended, daily average5.62 mg/L≤ 5 mg/L12%
August 2026Nitrogen, ammonia total [as N], daily average2.3 mg/L≤ 1.9 mg/L21%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 5 mg/Lall year
Solids, total suspendedsingle grab sample≤ 30 mg/Lall year
Solids, total suspendeddaily average≤ 7.5 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 1.9 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 2.9 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .18 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 MPN/100mLall year
E. colisingle grab sample≤ 399 MPN/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 7.5 lb/dall year

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0126101 · MCP: https://passage-data.com/mcp