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Hempstead, City of

Sewage treatment plant, Hempstead, Texas. NPDES permit TX0023809, in force until Jan 29, 2031. Last 12 months: over a limit 9 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (21 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
9 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
March 2026Solids, total suspended, daily average19.8 mg/L≤ 15 mg/L32%
March 2026Solids, total suspended, daily maximum64 mg/L≤ 40 mg/L60%
April 2026Nitrogen, ammonia total [as N], daily average28.15 lb/d≤ 25 lb/d13%
April 2026Nitrogen, ammonia total [as N], daily average4.4 mg/L≤ 3 mg/L47%
April 2026Nitrogen, ammonia total [as N], daily maximum11 mg/L≤ 10 mg/L10%
July 2026Nitrogen, ammonia total [as N], daily average3.63 mg/L≤ 3 mg/L21%
July 2026Nitrogen, ammonia total [as N], daily maximum17.6 mg/L≤ 10 mg/L76%
September 2026E. coli, daily average135 CFU/100mL≤ 126 CFU/100mL7%
September 2026E. coli, daily maximum2420 CFU/100mL≤ 399 CFU/100mL507%

Limits in force (21)

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≤ 123 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≤ 25 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .98 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≤ 126 CFU/100mLall year
E. colidaily maximum≤ 399 CFU/100mLall year
Solids, total dissolveddaily averagereport only (mg/L)all year
Solids, total dissolveddaily maximumreport only (mg/L)all year
Solids, total dissolveddaily averagereport only (lb/d)all 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≤ 82 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/TX0023809 · MCP: https://passage-data.com/mcp