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Montgomery County Mud No 144

Sewage treatment plant, Conroe, Texas. NPDES permit TX0139301, in force until Jan 24, 2030. Last 12 months: over a limit 6 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
August 2026Nitrogen, ammonia total [as N], daily average6.54 lb/d≤ 3.8 lb/d72%
August 2026Nitrogen, ammonia total [as N], daily average8.1 mg/L≤ 3 mg/L170%
August 2026Nitrogen, ammonia total [as N], single grab sample21.6 mg/L≤ 15 mg/L44%
September 2026Nitrogen, ammonia total [as N], daily average< 7.07 lb/d≤ 3.8 lb/d86%
September 2026Nitrogen, ammonia total [as N], daily average< 8.3 mg/L≤ 3 mg/L177%
September 2026Nitrogen, ammonia total [as N], single grab sample20.8 mg/L≤ 15 mg/L39%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 15 mg/Lall year
Solids, total suspendedsingle grab sample≤ 60 mg/Lall year
Solids, total suspendeddaily average≤ 19 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 3.8 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .15 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≤ 63 MPN/100mLall year
E. colisingle grab sample≤ 200 MPN/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 35 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 13 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/TX0139301 · MCP: https://passage-data.com/mcp