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Union Water Supply Corporation

Sewerage Systems, Garciasville, Texas. NPDES permit TX0140163, in force until Dec 30, 2030. Last 12 months: over a limit 37 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
Oct 2024 – Sep 2025
21 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 37 values over a limit
Period endingParameterReportedLimitOver by
November 2025Nitrogen, ammonia total [as N], daily average21.83 lb/d≤ 19 lb/d15%
November 2025Nitrogen, ammonia total [as N], daily average6.94 mg/L≤ 3 mg/L131%
November 2025Nitrogen, ammonia total [as N], daily maximum14.2 mg/L≤ 10 mg/L42%
November 2025Solids, total suspended, daily average17.05 mg/L≤ 15 mg/L14%
December 2025BOD, carbonaceous [5 day, 20 C], daily maximum26.4 mg/L≤ 25 mg/L6%
December 2025E. coli, daily average672.25 CFU/100mL≤ 126 CFU/100mL434%
December 2025E. coli, daily maximum1299.7 CFU/100mL≤ 399 CFU/100mL226%
December 2025Nitrogen, ammonia total [as N], daily average17.66 mg/L≤ 3 mg/L489%
December 2025Nitrogen, ammonia total [as N], daily average52.77 lb/d≤ 19 lb/d178%
December 2025Nitrogen, ammonia total [as N], daily maximum29.8 mg/L≤ 10 mg/L198%
December 2025Solids, total suspended, daily average31 mg/L≤ 15 mg/L107%
December 2025Solids, total suspended, daily maximum65 mg/L≤ 40 mg/L63%
January 2026Nitrogen, ammonia total [as N], daily average24.32 mg/L≤ 3 mg/L711%
January 2026Nitrogen, ammonia total [as N], daily average75.53 lb/d≤ 19 lb/d298%
January 2026Nitrogen, ammonia total [as N], daily maximum42 mg/L≤ 10 mg/L320%
January 2026Solids, total suspended, daily average15.45 mg/L≤ 15 mg/L3%
February 2026BOD, carbonaceous [5 day, 20 C], daily average16.11 mg/L≤ 10 mg/L61%
February 2026BOD, carbonaceous [5 day, 20 C], daily maximum31.8 mg/L≤ 25 mg/L27%
February 2026Nitrogen, ammonia total [as N], daily average20.48 mg/L≤ 3 mg/L583%
February 2026Nitrogen, ammonia total [as N], daily average63.78 lb/d≤ 19 lb/d236%
February 2026Nitrogen, ammonia total [as N], daily maximum28.8 mg/L≤ 10 mg/L188%
March 2026Nitrogen, ammonia total [as N], daily average16.5 mg/L≤ 3 mg/L450%
March 2026Nitrogen, ammonia total [as N], daily average36.1 lb/d≤ 19 lb/d90%
March 2026Nitrogen, ammonia total [as N], daily maximum22.6 mg/L≤ 10 mg/L126%
March 2026Solids, total suspended, daily average18.1 mg/L≤ 15 mg/L21%
April 2026Nitrogen, ammonia total [as N], daily average26.9 lb/d≤ 19 lb/d42%
April 2026Nitrogen, ammonia total [as N], daily average8.7 mg/L≤ 3 mg/L190%
April 2026Nitrogen, ammonia total [as N], daily maximum15.5 mg/L≤ 10 mg/L55%
May 2026Nitrogen, ammonia total [as N], daily average23.49 lb/d≤ 19 lb/d24%
May 2026Nitrogen, ammonia total [as N], daily average7.29 mg/L≤ 3 mg/L143%
May 2026Nitrogen, ammonia total [as N], daily maximum26.8 mg/L≤ 10 mg/L168%
June 2026Nitrogen, ammonia total [as N], daily average24.33 lb/d≤ 19 lb/d28%
June 2026Nitrogen, ammonia total [as N], daily average7.69 mg/L≤ 3 mg/L156%
June 2026Nitrogen, ammonia total [as N], daily maximum26.8 mg/L≤ 10 mg/L168%
July 2026Nitrogen, ammonia total [as N], daily average6.15 mg/L≤ 3 mg/L105%
July 2026Nitrogen, ammonia total [as N], daily maximum15.5 mg/L≤ 10 mg/L55%
August 2026Nitrogen, ammonia total [as N], daily average3.33 mg/L≤ 3 mg/L11%

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 suspendeddaily maximum≤ 40 mg/Lall year
Solids, total suspendeddaily average≤ 97 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 19 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .774 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum< .1 mg/Lall year
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year
E. colidaily average≤ 126 CFU/100mLall year
E. colidaily maximum≤ 399 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 65 lb/dall 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/TX0140163 · MCP: https://passage-data.com/mcp