Leon Isd — NPDES permit TX0135127: limits, due date and EPA's record

Leon Isd

Sewage treatment plant, Jewett, Texas. NPDES permit TX0135127 expired Jan 17, 2025; its limits still apply. Last 12 months: over a limit 20 times (last June 2026), 15 required values missing, 9 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 20 days after each period: form A monthly (13 values), form Q quarterly

Last report on file

June 2026

Oct 2024 – Sep 2025

34 values over a limit, 0 required values missing, 11 of 16 reports late

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

All 20 values over a limit

Period ending	Parameter	Reported	Limit	Over by
October 2025	BOD, 5-day, 20 deg. C, daily average	36.8 mg/L	≤ 10 mg/L	268%
October 2025	BOD, 5-day, 20 deg. C, single grab sample	78 mg/L	≤ 35 mg/L	123%
October 2025	E. coli, daily average	242000 CFU/100mL	≤ 126 CFU/100mL	—
October 2025	E. coli, single grab sample	242000 CFU/100mL	≤ 399 CFU/100mL	60552%
October 2025	Solids, total suspended, daily average	63 mg/L	≤ 15 mg/L	320%
October 2025	Solids, total suspended, single grab sample	123 mg/L	≤ 60 mg/L	105%
December 2025	BOD, 5-day, 20 deg. C, daily average	13.5 mg/L	≤ 10 mg/L	35%
December 2025	BOD, 5-day, 20 deg. C, single grab sample	46 mg/L	≤ 35 mg/L	31%
December 2025	Solids, total suspended, daily average	19 mg/L	≤ 15 mg/L	27%
January 2026	BOD, 5-day, 20 deg. C, daily average	11 mg/L	≤ 10 mg/L	10%
January 2026	E. coli, daily average	2420 CFU/100mL	≤ 126 CFU/100mL	1821%
January 2026	E. coli, single grab sample	2420 CFU/100mL	≤ 399 CFU/100mL	507%
January 2026	Solids, total suspended, daily average	17.25 mg/L	≤ 15 mg/L	15%
February 2026	Solids, total suspended, daily average	21.25 mg/L	≤ 15 mg/L	42%
April 2026	Solids, total suspended, daily average	17.4 mg/L	≤ 15 mg/L	16%
May 2026	BOD, 5-day, 20 deg. C, daily average	21.75 mg/L	≤ 10 mg/L	118%
May 2026	BOD, 5-day, 20 deg. C, single grab sample	57 mg/L	≤ 35 mg/L	63%
May 2026	Solids, total suspended, daily average	42.5 mg/L	≤ 15 mg/L	183%
May 2026	Solids, total suspended, single grab sample	89 mg/L	≤ 60 mg/L	48%
June 2026	Solids, total suspended, daily average	19.75 mg/L	≤ 15 mg/L	32%

Limits in force (15)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	minimum	≥ 4 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 10 mg/L	all year
BOD, 5-day, 20 deg. C	single grab sample	≤ 35 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 1.7 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 15 mg/L	all year
Solids, total suspended	single grab sample	≤ 60 mg/L	all year
Solids, total suspended	daily average	≤ 2.5 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .02 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year
E. coli	daily average	≤ 126 CFU/100mL	all year
E. coli	single grab sample	≤ 399 CFU/100mL	all year

How strict are these limits?

BOD, 5-day, 20 deg. C, single grab sample 35 mg/L — stricter than 79% of 310 other minor POTWs in Texas; 21% have the same limit

BOD, 5-day, 20 deg. C, daily average 10 mg/L — stricter than 77% of 340 other minor POTWs in Texas; 22% have the same limit

Solids, total suspended, daily average 15 mg/L — stricter than 35% of 939 other minor POTWs in Texas; 58% have the same limit

Your permit document is the final word. As JSON: /api/v1/permits/TX0135127 · MCP: https://passage-data.com/mcp