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Katy Isd

Sewage treatment plant, Katy, Texas. NPDES permit TX0079201, in force until Aug 12, 2027. Last 12 months: over a limit 2 times (last November 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Renewal application due
Feb 13, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Nitrogen, ammonia total [as N], daily average< 6.87 mg/L≤ 3 mg/L129%
November 2025Nitrogen, ammonia total [as N], single grab sample34.2 mg/L≤ 15 mg/L128%

Limits in force (25)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/LApr–Oct
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/LJan, Feb, Mar, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 15 mg/Lall year
Solids, total suspendedsingle grab sample≤ 60 mg/Lall year
Solids, total suspendeddaily average≤ 13 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/LApr–Oct
Nitrogen, ammonia total [as N]daily average≤ 3 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/LApr–Oct
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]daily average≤ 1.7 lb/dApr–Oct
Nitrogen, ammonia total [as N]daily average≤ 2.5 lb/dJan, Feb, Mar, Nov, Dec
Flow, in conduit or thru treatment plantdaily average≤ .1 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≤ 63 CFU/100mLall year
E. colisingle grab sample≤ 200 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 7 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]daily average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 32 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 35 mg/LJan, Feb, Mar, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily average≤ 5.8 lb/dApr–Oct
BOD, carbonaceous [5 day, 20 C]daily average≤ 8.3 lb/dJan, Feb, Mar, Nov, Dec

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/TX0079201 · MCP: https://passage-data.com/mcp