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Harris County Wcid No.119

Sewage treatment plant, Houston, Texas. NPDES permit TX0021211, in force until Feb 9, 2028. Last 12 months: over a limit 7 times (last May 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Renewal application due
Aug 13, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
6 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
January 2026Nitrogen, ammonia total [as N], daily average17.3 lb/d≤ 17 lb/d2%
January 2026Nitrogen, ammonia total [as N], daily average2.97 mg/L≤ 2 mg/L49%
January 2026Nitrogen, ammonia total [as N], daily maximum11.8 mg/L≤ 10 mg/L18%
February 2026Nitrogen, ammonia total [as N], daily average20.6 lb/d≤ 17 lb/d21%
February 2026Nitrogen, ammonia total [as N], daily average3.05 mg/L≤ 2 mg/L53%
March 2026Nitrogen, ammonia total [as N], daily average2.18 mg/L≤ 2 mg/L9%
May 2026Nitrogen, ammonia total [as N], daily maximum10.2 mg/L≤ 10 mg/L2%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 6 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≤ 124 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 17 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .995 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. colidaily maximum≤ 200 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 7 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 17 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 58 lb/dall year

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/TX0021211 · MCP: https://passage-data.com/mcp