Passage Data · Check a report · Use it from your AI

Thornton, City of

Sewage treatment plant, Thornton, Texas. NPDES permit TX0075639 expired Sep 25, 2024; its limits still apply. Last 12 months: over a limit 14 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (13 values), form Q quarterly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, daily average39 mg/L≤ 20 mg/L95%
January 2026Solids, total suspended, daily average6.97 lb/d≤ 6.8 lb/d2%
February 2026Solids, total suspended, daily average45.3 mg/L≤ 20 mg/L127%
February 2026Solids, total suspended, single grab sample67 mg/L≤ 65 mg/L3%
March 2026BOD, 5-day, 20 deg. C, daily average21.5 mg/L≤ 20 mg/L8%
March 2026Solids, total suspended, daily average43.3 mg/L≤ 20 mg/L117%
April 2026Solids, total suspended, daily average40 mg/L≤ 20 mg/L100%
April 2026Solids, total suspended, daily average8.59 lb/d≤ 6.8 lb/d26%
May 2026Solids, total suspended, daily average32.8 mg/L≤ 20 mg/L64%
June 2026Flow, in conduit or thru treatment plant, daily average.045 MGD≤ .041 MGD10%
June 2026Solids, total suspended, daily average31.3 mg/L≤ 20 mg/L57%
August 2026BOD, 5-day, 20 deg. C, daily average20.25 mg/L≤ 20 mg/L1%
August 2026Solids, total suspended, daily average37.5 mg/L≤ 20 mg/L88%
September 2026Solids, total suspended, daily average26.8 mg/L≤ 20 mg/L34%

Limits in force (15)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly 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≤ 6.8 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≤ 6.8 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .041 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.

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0075639 · MCP: https://passage-data.com/mcp