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Ladonia, City of

Sewage treatment plant, Ladonia, Texas. NPDES permit TX0057011, in force until Jun 19, 2031. Last 12 months: over a limit 12 times (last June 2026), 3 required values missing, 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 20 days after each period: form A monthly (12 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 3 values over a limit, 3 required values missing, 1 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	E. coli, daily average	296.2 CFU/100mL	≤ 126 CFU/100mL	135%
December 2025	E. coli, daily maximum	461 CFU/100mL	≤ 399 CFU/100mL	16%
December 2025	pH, maximum	10 SU	≤ 9 SU	—
February 2026	BOD, 5-day, 20 deg. C, daily average	32.8 mg/L	≤ 30 mg/L	9%
February 2026	pH, maximum	9.5 SU	≤ 9 SU	—
April 2026	BOD, 5-day, 20 deg. C, daily average	55.7 mg/L	≤ 30 mg/L	86%
April 2026	Solids, total suspended, daily average	111.5 mg/L	≤ 90 mg/L	24%
May 2026	BOD, 5-day, 20 deg. C, daily average	31.23 mg/L	≤ 30 mg/L	4%
May 2026	Solids, total suspended, daily average	115 mg/L	≤ 90 mg/L	28%
May 2026	pH, maximum	9.4 SU	≤ 9 SU	—
June 2026	E. coli, daily maximum	2419.6 CFU/100mL	≤ 399 CFU/100mL	506%
June 2026	pH, maximum	9.1 SU	≤ 9 SU	—

Limits in force (12)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 70 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 133 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 90 mg/L	all year
Solids, total suspended	daily average	≤ 398 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .53 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
E. coli	daily average	≤ 126 CFU/100mL	all year
E. coli	daily maximum	≤ 399 CFU/100mL	all year

How strict are these limits?

Oxygen, dissolved [DO], monthly minimum at least 4 mg/L — stricter than 15% of 905 other minor POTWs in Texas; 59% have the same limit

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/TX0057011 · MCP: https://passage-data.com/mcp