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West Columbia, City of

Sewage treatment plant, major discharger, West Columbia, Texas. NPDES permit TX0026182, in force until Apr 14, 2030. Last 12 months: over a limit 14 times (last July 2026), 6 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (17 values), outfall TX1 form Q quarterly (16 values), outfall TXA form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
7 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 2026Flow, in conduit or thru treatment plant, 2-hour peak3326 gal/min≤ 3317 gal/min0%
April 2026E. coli, daily average496 CFU/100mL≤ 126 CFU/100mL294%
April 2026E. coli, daily maximum2420 CFU/100mL≤ 399 CFU/100mL507%
May 2026E. coli, daily average1601 CFU/100mL≤ 126 CFU/100mL1171%
May 2026E. coli, daily maximum4800 CFU/100mL≤ 399 CFU/100mL1103%
May 2026Flow, in conduit or thru treatment plant, 2-hour peak3569 gal/min≤ 3317 gal/min8%
May 2026Oxygen, dissolved [DO], monthly minimum5.2 mg/L≥ 6 mg/L13%
June 2026E. coli, daily average1708 CFU/100mL≤ 126 CFU/100mL1256%
June 2026E. coli, daily maximum4800 CFU/100mL≤ 399 CFU/100mL1103%
June 2026Flow, in conduit or thru treatment plant, 2-hour peak3528 gal/min≤ 3317 gal/min6%
June 2026Oxygen, dissolved [DO], monthly minimum3.7 mg/L≥ 6 mg/L38%
July 2026E. coli, daily average509 CFU/100mL≤ 126 CFU/100mL304%
July 2026E. coli, daily maximum2400 CFU/100mL≤ 399 CFU/100mL502%
July 2026Flow, in conduit or thru treatment plant, 2-hour peak3458 gal/min≤ 3317 gal/min4%

Limits in force (37)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily average≤ 10 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 25 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily average≤ 133 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 40 mg/Lall year001
Solids, total suspendeddaily average≤ 200 lb/dall year001
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plant2-hour peak≤ 3317 gal/minall year001
Flow, in conduit or thru treatment plantannual average≤ 1.6 MGDall year001
Chlorine, total residualinstantaneous maximum< .1 mg/Lall year001
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year001
E. colidaily average≤ 126 CFU/100mLall year001
E. colidaily maximum≤ 399 CFU/100mLall year001
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly average minimumreport only (pass=0;fail=1)all yearTX1
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX1
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all yearTX1
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all yearTX1
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulexmonthly average minimumreport only (%)all yearTX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (%)all yearTX1
Whole effluent toxicity - retest #1single samplereport only (pass=0;fail=1)all yearTXA
Whole effluent toxicity - retest #2single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute D. Pulexsingle samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Pimephales promelassingle samplereport only (pass=0;fail=1)all yearTXA

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/TX0026182 · MCP: https://passage-data.com/mcp