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Trinidad, City of

Sewage treatment plant, Trinidad, Texas. NPDES permit TX0054585 expired Aug 16, 2026; its limits still apply. Last 12 months: over a limit 14 times (last July 2026), 48 required values missing, 9 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (12 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 36 required values missing, 2 of 12 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily average31 mg/L≤ 30 mg/L3%
October 2025BOD, 5-day, 20 deg. C, daily average31 mg/L≤ 30 mg/L3%
October 2025Solids, total suspended, daily average93 mg/L≤ 90 mg/L3%
October 2025Solids, total suspended, daily average93 mg/L≤ 90 mg/L3%
December 2025E. coli, daily average166 CFU/100mL≤ 126 CFU/100mL32%
January 2026BOD, 5-day, 20 deg. C, daily average34 mg/L≤ 30 mg/L13%
January 2026BOD, 5-day, 20 deg. C, daily average34 mg/L≤ 30 mg/L13%
February 2026BOD, 5-day, 20 deg. C, daily average33 mg/L≤ 30 mg/L10%
February 2026BOD, 5-day, 20 deg. C, daily average33 mg/L≤ 30 mg/L10%
March 2026Solids, total suspended, daily average96 mg/L≤ 90 mg/L7%
March 2026pH, maximum10 SU≤ 9 SU—
May 2026E. coli, single grab sample2420 CFU/100mL≤ 399 CFU/100mL507%
May 2026pH, maximum9.3 SU≤ 9 SU—
July 2026BOD, 5-day, 20 deg. C, daily average32 mg/L≤ 30 mg/L7%

Limits in force (12)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Csingle grab sample≤ 100 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 38 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 90 mg/Lall year
Solids, total suspendeddaily average≤ 113 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
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/TX0054585 · MCP: https://passage-data.com/mcp