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Lone Oak, City of

Sewage treatment plant, Lone Oak, Texas. NPDES permit TX0100021 expired Aug 16, 2026; its limits still apply. Last 12 months: over a limit 12 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (15 values), form Q quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
17 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
October 2025Chlorine, total residual, monthly minimum.98 mg/L≥ 1 mg/L2%
October 2025Flow, in conduit or thru treatment plant, daily average.0681 MGD≤ .06 MGD14%
November 2025Chlorine, total residual, monthly maximum4.23 mg/L< 4 mg/L6%
November 2025Flow, in conduit or thru treatment plant, daily average.0617 MGD≤ .06 MGD3%
January 2026Flow, in conduit or thru treatment plant, daily average.0611 MGD≤ .06 MGD2%
February 2026Flow, in conduit or thru treatment plant, daily average.0703 MGD≤ .06 MGD17%
March 2026Chlorine, total residual, monthly maximum4.06 mg/L< 4 mg/L2%
March 2026Flow, in conduit or thru treatment plant, daily average.0656 MGD≤ .06 MGD9%
April 2026Flow, in conduit or thru treatment plant, daily average.0791 MGD≤ .06 MGD32%
May 2026Flow, in conduit or thru treatment plant, daily average.0872 MGD≤ .06 MGD45%
June 2026Flow, in conduit or thru treatment plant, daily average.082 MGD≤ .06 MGD37%
September 2026Chlorine, total residual, monthly minimum.93 mg/L≥ 1 mg/L7%

Limits in force (23)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 30 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Csingle grab sample≤ 100 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily average≤ 15 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 90 mg/Lall year
Solids, total suspendeddaily average≤ 45 lb/dall year
Nitrogen, ammonia total [as N]daily average≤ 6 mg/LJun–Sep
Nitrogen, ammonia total [as N]daily averagereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]single grab sample≤ 15 mg/LJun–Sep
Nitrogen, ammonia total [as N]single grab samplereport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily average≤ 3 lb/dJun–Sep
Nitrogen, ammonia total [as N]daily averagereport only (lb/d)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Flow, in conduit or thru treatment plantdaily average≤ .06 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. coli, colony forming units [CFU]daily average≤ 126 CFU/100mLall year
E. coli, colony forming units [CFU]single grab sample≤ 399 CFU/100mLall year
BOD, carbonaceous [5 day, 20 C]daily average≤ 30 mg/LJun–Sep
BOD, carbonaceous [5 day, 20 C]single grab sample≤ 100 mg/LJun–Sep
BOD, carbonaceous [5 day, 20 C]daily average≤ 15 lb/dJun–Sep

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/TX0100021 · MCP: https://passage-data.com/mcp