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Natalia, City of

Sewage treatment plant, Natalia, Texas. NPDES permit TX0068632, in force until Jan 12, 2031. Last 12 months: over a limit 9 times (last March 2026), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value 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 2025BOD, carbonaceous [5 day, 20 C], daily average5.7 mg/L≤ 5 mg/L14%
December 2025BOD, carbonaceous [5 day, 20 C], daily average8.2 mg/L≤ 5 mg/L64%
December 2025Nitrogen, ammonia total [as N], daily average4 mg/L≤ 2 mg/L100%
January 2026BOD, carbonaceous [5 day, 20 C], daily average6.5 mg/L≤ 5 mg/L30%
February 2026BOD, carbonaceous [5 day, 20 C], daily average6.2 mg/L≤ 5 mg/L24%
February 2026Solids, total suspended, daily average19.6 lb/d≤ 11 lb/d78%
February 2026Solids, total suspended, daily average33.7 mg/L≤ 5 mg/L574%
February 2026Solids, total suspended, single grab sample66 mg/L≤ 30 mg/L120%
March 2026Nitrogen, ammonia total [as N], daily average2.5 mg/L≤ 2 mg/L25%

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≤ 5 mg/Lall year
Solids, total suspendedsingle grab sample≤ 30 mg/Lall year
Solids, total suspendeddaily average≤ 11 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 4.3 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .26 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. colisingle grab sample≤ 399 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 11 lb/dall year

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/TX0068632 · MCP: https://passage-data.com/mcp