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Northwinds Association Inc

Sewerage Systems, Houston, Texas. NPDES permit TX0094056, in force until Mar 31, 2027. Last 12 months: over a limit 3 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (16 values), form Q quarterly (2 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
8 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period endingParameterReportedLimitOver by
December 2025Flow, in conduit or thru treatment plant, daily average.0067 MGD≤ .006 MGD12%
January 2026Flow, in conduit or thru treatment plant, daily average.0079 MGD≤ .006 MGD32%
February 2026Flow, in conduit or thru treatment plant, daily average.0071 MGD≤ .006 MGD18%

Limits in force (21)

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 suspendedsingle grab sample≤ 60 mg/Lall year
Solids, total suspendeddaily average≤ .75 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/LMar–Oct
Nitrogen, ammonia total [as N]daily average≤ 3 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/LMar–Oct
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily average≤ .1 lb/dMar–Oct
Nitrogen, ammonia total [as N]daily average≤ .15 lb/dJan, Feb, Nov, Dec
Flow, in conduit or thru treatment plantdaily average≤ .006 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≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 35 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ .5 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/TX0094056 · MCP: https://passage-data.com/mcp