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T&W Water Service Company

Sewerage Systems, Jefferson County, Texas. NPDES permit TX0108138, in force until May 16, 2029. Last 12 months: over a limit 2 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (16 values), form Q quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
May 2026E. coli, daily average240.5 CFU/100mL≤ 126 CFU/100mL91%
May 2026E. coli, single grab sample411 CFU/100mL≤ 399 CFU/100mL3%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]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≤ 2.3 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≤ 2.3 lb/dall year
Nitrogen, ammonia total [as N]daily averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]single grab samplereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantdaily average≤ .014 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

New limits from Jun 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
BOD, carbonaceous [5 day, 20 C], daily average2.3 lb/dnew——
BOD, carbonaceous [5 day, 20 C], daily average20 mg/Lnew——
BOD, carbonaceous [5 day, 20 C], single grab sample65 mg/Lnew——
Nitrogen, ammonia total [as N], daily average12 mg/Lnew3.135 mg/L (12 values)0.261×
Nitrogen, ammonia total [as N], daily average1.4 lb/dnew0.03705 lb/d (12 values)0.0265×
Nitrogen, ammonia total [as N], single grab sample15 mg/Lnew6.65 mg/L (12 values)0.443×

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/TX0108138 · MCP: https://passage-data.com/mcp