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Quadvest LP

Sewerage Systems, Hockley, Texas. NPDES permit TX0128457, in force until Oct 5, 2028. Last 12 months: over a limit 8 times (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Renewal application due
Apr 8, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
20 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 average2.14 mg/L≤ 2 mg/L7%
December 2025BOD, carbonaceous [5 day, 20 C], daily average7.84 mg/L≤ 7 mg/L12%
December 2025BOD, carbonaceous [5 day, 20 C], daily maximum27.8 mg/L≤ 22 mg/L26%
December 2025Nitrogen, ammonia total [as N], daily average16.46 mg/L≤ 2 mg/L723%
December 2025Nitrogen, ammonia total [as N], daily maximum32.6 mg/L≤ 10 mg/L226%
December 2025Solids, total suspended, daily average24.96 mg/L≤ 15 mg/L66%
December 2025Solids, total suspended, daily maximum100 mg/L≤ 40 mg/L150%
January 2026Chlorine, total residual, monthly minimum.97 mg/L≥ 1 mg/L3%

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≤ 63 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≤ 8.3 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .5 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 MPN/100mLall year
E. colidaily maximum≤ 200 MPN/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 7 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 22 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 29 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/TX0128457 · MCP: https://passage-data.com/mcp