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West Tawakoni, Town of

Sewage treatment plant, West Tawakoni, Texas. NPDES permit TX0064513 expired Jun 22, 2026; its limits still apply. Last 12 months: over a limit 21 times (last August 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
19 values over a limit, 18 required values missing, 3 of 12 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily average10.12 mg/L≤ 10 mg/L1%
October 2025Solids, total suspended, daily average17.65 mg/L≤ 15 mg/L18%
November 2025BOD, 5-day, 20 deg. C, daily average11.12 mg/L≤ 10 mg/L11%
November 2025Solids, total suspended, daily average20.55 mg/L≤ 15 mg/L37%
December 2025BOD, 5-day, 20 deg. C, daily average12.39 mg/L≤ 10 mg/L24%
December 2025Solids, total suspended, daily average29.2 mg/L≤ 15 mg/L95%
December 2025Solids, total suspended, daily average45.3 lb/d≤ 38 lb/d19%
January 2026Solids, total suspended, daily average28.95 mg/L≤ 15 mg/L93%
January 2026Solids, total suspended, daily average40.85 lb/d≤ 38 lb/d7%
February 2026BOD, 5-day, 20 deg. C, daily average11.7 mg/L≤ 10 mg/L17%
February 2026Flow, in conduit or thru treatment plant, daily average101.6 MGD≤ .3 MGD33767%
February 2026Solids, total suspended, daily average26.67 mg/L≤ 15 mg/L78%
March 2026BOD, 5-day, 20 deg. C, daily average10.4 mg/L≤ 10 mg/L4%
March 2026Solids, total suspended, daily average24.9 mg/L≤ 15 mg/L66%
April 2026BOD, 5-day, 20 deg. C, daily average12.8 mg/L≤ 10 mg/L28%
April 2026E. coli, single grab sample2419.6 CFU/100mL≤ 399 CFU/100mL506%
April 2026Solids, total suspended, daily average34.1 mg/L≤ 15 mg/L127%
May 2026Solids, total suspended, daily average17.41 mg/L≤ 15 mg/L16%
July 2026BOD, 5-day, 20 deg. C, daily average12.13 mg/L≤ 10 mg/L21%
July 2026Solids, total suspended, daily average15.7 mg/L≤ 15 mg/L5%
August 2026BOD, 5-day, 20 deg. C, daily average10.74 mg/L≤ 10 mg/L7%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Csingle grab sample≤ 35 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 25 lb/dall 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≤ 38 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≤ .3 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/TX0064513 · MCP: https://passage-data.com/mcp