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Marquez, City of

Sewage treatment plant, Marquez, Texas. NPDES permit TX0117579 expired Jul 2, 2026; its limits still apply. Last 12 months: over a limit 32 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (12 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
39 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 32 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily average40.4 mg/L≤ 30 mg/L35%
October 2025pH, maximum9.7 SU≤ 9 SU—
November 2025BOD, 5-day, 20 deg. C, daily average33.1 mg/L≤ 30 mg/L10%
November 2025E. coli, single grab sample435.2 CFU/100mL≤ 399 CFU/100mL9%
November 2025Solids, total suspended, daily average90.925 mg/L≤ 90 mg/L1%
November 2025pH, maximum9.5 SU≤ 9 SU—
December 2025BOD, 5-day, 20 deg. C, daily average33.78 mg/L≤ 30 mg/L13%
December 2025E. coli, single grab sample517.2 CFU/100mL≤ 399 CFU/100mL30%
December 2025pH, maximum9.5 SU≤ 9 SU—
January 2026BOD, 5-day, 20 deg. C, daily average39.275 mg/L≤ 30 mg/L31%
January 2026pH, maximum9.1 SU≤ 9 SU—
February 2026BOD, 5-day, 20 deg. C, daily average34.65 mg/L≤ 30 mg/L16%
February 2026pH, maximum9.5 SU≤ 9 SU—
March 2026BOD, 5-day, 20 deg. C, daily average36.4 mg/L≤ 30 mg/L21%
March 2026Solids, total suspended, daily average105.92 mg/L≤ 90 mg/L18%
March 2026pH, maximum9.7 SU≤ 9 SU—
April 2026BOD, 5-day, 20 deg. C, daily average31.025 mg/L≤ 30 mg/L3%
April 2026E. coli, daily average214.2 CFU/100mL≤ 126 CFU/100mL70%
April 2026Solids, total suspended, daily average138.575 mg/L≤ 90 mg/L54%
April 2026pH, maximum9.8 SU≤ 9 SU—
May 2026BOD, 5-day, 20 deg. C, daily average38.6 mg/L≤ 30 mg/L29%
May 2026Solids, total suspended, daily average112.4 mg/L≤ 90 mg/L25%
May 2026pH, maximum9.7 SU≤ 9 SU—
June 2026pH, maximum10.1 SU≤ 9 SU—
July 2026BOD, 5-day, 20 deg. C, daily average52.875 mg/L≤ 30 mg/L76%
July 2026BOD, 5-day, 20 deg. C, single grab sample116 mg/L≤ 100 mg/L16%
July 2026Oxygen, dissolved [DO], monthly minimum2.6 mg/L≥ 4 mg/L35%
July 2026Solids, total suspended, daily average103.7 mg/L≤ 90 mg/L15%
July 2026pH, maximum10.2 SU≤ 9 SU—
August 2026BOD, 5-day, 20 deg. C, daily average34.25 mg/L≤ 30 mg/L14%
August 2026pH, maximum10.2 SU≤ 9 SU—
September 2026pH, maximum9.7 SU≤ 9 SU—

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≤ 10 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 90 mg/Lall year
Solids, total suspendeddaily average≤ 30 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .04 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/TX0117579 · MCP: https://passage-data.com/mcp