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Lavon, City of

Sewage treatment plant, Lavon, Texas. NPDES permit TX0140341 expired Jun 10, 2026; its limits still apply. Last 12 months: over a limit 7 times (last August 2026). 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

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

Period endingParameterReportedLimitOver by
January 2026BOD, carbonaceous [5 day, 20 C], daily average14.5 mg/L≤ 5 mg/L190%
January 2026BOD, carbonaceous [5 day, 20 C], single grab sample32 mg/L≤ 30 mg/L7%
January 2026Nitrogen, ammonia total [as N], daily average2.12 mg/L≤ 2 mg/L6%
January 2026Solids, total suspended, daily average24 mg/L≤ 15 mg/L60%
February 2026BOD, carbonaceous [5 day, 20 C], daily average8 mg/L≤ 5 mg/L60%
May 2026BOD, carbonaceous [5 day, 20 C], daily average9 mg/L≤ 5 mg/L80%
August 2026pH, minimum3.52 SU≥ 6 SU—

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≤ 31 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 4.2 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .25 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
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≤ 10 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/TX0140341 · MCP: https://passage-data.com/mcp