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Alto, City of

Sewage treatment plant, Alto, Texas. NPDES permit TX0142697, in force until Aug 4, 2028. Last 12 months: over a limit 35 times (last August 2026), 2 required values missing, 7 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values)
Renewal application due
Feb 6, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
30 values over a limit, 0 required values missing, 6 of 12 reports late

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

All 35 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], daily average12.7 mg/L≤ 10 mg/L27%
October 2025Nitrogen, ammonia total [as N], daily average4.21 mg/L≤ 3 mg/L40%
October 2025Nitrogen, ammonia total [as N], single grab sample18.8 mg/L≤ 15 mg/L25%
October 2025Oxygen, dissolved [DO], monthly minimum4.1 mg/L≥ 5 mg/L18%
November 2025BOD, carbonaceous [5 day, 20 C], daily average22.9 mg/L≤ 10 mg/L129%
November 2025BOD, carbonaceous [5 day, 20 C], single grab sample48.8 mg/L≤ 35 mg/L39%
November 2025Nitrogen, ammonia total [as N], daily average15.42 mg/L≤ 3 mg/L414%
November 2025Nitrogen, ammonia total [as N], single grab sample34.5 mg/L≤ 15 mg/L130%
November 2025Oxygen, dissolved [DO], monthly minimum4.5 mg/L≥ 5 mg/L10%
December 2025BOD, carbonaceous [5 day, 20 C], daily average11 mg/L≤ 10 mg/L10%
December 2025Nitrogen, ammonia total [as N], daily average8.39 mg/L≤ 3 mg/L180%
January 2026BOD, carbonaceous [5 day, 20 C], daily average18.3 mg/L≤ 10 mg/L83%
January 2026Nitrogen, ammonia total [as N], daily average15.78 mg/L≤ 3 mg/L426%
January 2026Nitrogen, ammonia total [as N], single grab sample21.4 mg/L≤ 15 mg/L43%
January 2026Oxygen, dissolved [DO], monthly minimum4.1 mg/L≥ 5 mg/L18%
January 2026Solids, total suspended, daily average17.2 mg/L≤ 15 mg/L15%
February 2026BOD, carbonaceous [5 day, 20 C], daily average11.2 mg/L≤ 10 mg/L12%
February 2026Nitrogen, ammonia total [as N], daily average8.89 mg/L≤ 3 mg/L196%
February 2026Solids, total suspended, daily average15.8 mg/L≤ 15 mg/L5%
March 2026Nitrogen, ammonia total [as N], daily average5 mg/L≤ 3 mg/L67%
March 2026Oxygen, dissolved [DO], monthly minimum4.8 mg/L≥ 5 mg/L4%
April 2026Nitrogen, ammonia total [as N], daily average12.82 mg/L≤ 3 mg/L327%
April 2026Nitrogen, ammonia total [as N], single grab sample17.4 mg/L≤ 15 mg/L16%
April 2026Oxygen, dissolved [DO], monthly minimum1.2 mg/L≥ 5 mg/L76%
April 2026Solids, total suspended, daily average17.4 mg/L≤ 15 mg/L16%
April 2026pH, minimum5 SU≥ 6 SU—
May 2026Nitrogen, ammonia total [as N], daily average11.12 mg/L≤ 3 mg/L271%
May 2026Nitrogen, ammonia total [as N], single grab sample15.1 mg/L≤ 15 mg/L1%
May 2026Oxygen, dissolved [DO], monthly minimum4.2 mg/L≥ 5 mg/L16%
June 2026Nitrogen, ammonia total [as N], daily average7.5 mg/L≤ 3 mg/L150%
July 2026Nitrogen, ammonia total [as N], daily average10.27 mg/L≤ 3 mg/L242%
July 2026Oxygen, dissolved [DO], monthly minimum4.2 mg/L≥ 5 mg/L16%
August 2026E. coli, daily average2420 CFU/100mL≤ 126 CFU/100mL1821%
August 2026E. coli, single grab sample2420 CFU/100mL≤ 399 CFU/100mL507%
August 2026Oxygen, dissolved [DO], monthly minimum4 mg/L≥ 5 mg/L20%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 5 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≤ 50 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 10 lb/dall year
Flow, in conduit or thru treatment plantdaily average≤ .4 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≤ 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≤ 33 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/TX0142697 · MCP: https://passage-data.com/mcp