Ta Operating LLC — NPDES permit TX0137634: limits, due date and EPA's record

Ta Operating LLC

Sewerage Systems, Colorado County, Texas. NPDES permit TX0137634, in force until Aug 26, 2030. Last 12 months: over a limit 15 times (last September 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due

About 21 days after each period: form A monthly (16 values)

Last report on file

September 2026

Oct 2024 – Sep 2025

27 values over a limit, 100 required values missing, 8 of 16 reports late

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

All 15 values over a limit

Period ending	Parameter	Reported	Limit	Over by
October 2025	E. coli, single grab sample	1990 MPN/100mL	≤ 399 CFU/100mL	399%
November 2025	E. coli, single grab sample	1730 MPN/100mL	≤ 399 CFU/100mL	334%
November 2025	Oxygen, dissolved [DO], monthly minimum	.4 mg/L	≥ 4 mg/L	90%
December 2025	E. coli, single grab sample	12000 MPN/100mL	≤ 399 CFU/100mL	2908%
February 2026	Oxygen, dissolved [DO], monthly minimum	1.45 mg/L	≥ 4 mg/L	64%
March 2026	Oxygen, dissolved [DO], monthly minimum	2.13 mg/L	≥ 4 mg/L	47%
March 2026	Solids, total suspended, daily average	39.2 mg/L	≤ 15 mg/L	161%
March 2026	Solids, total suspended, single grab sample	151.9 mg/L	≤ 60 mg/L	153%
May 2026	E. coli, single grab sample	2420 MPN/100mL	≤ 399 CFU/100mL	507%
May 2026	Solids, total suspended, daily average	42.05 mg/L	≤ 15 mg/L	180%
May 2026	Solids, total suspended, single grab sample	84 mg/L	≤ 60 mg/L	40%
June 2026	E. coli, single grab sample	8160 MPN/100mL	≤ 399 CFU/100mL	1945%
July 2026	E. coli, single grab sample	410 MPN/100mL	≤ 399 CFU/100mL	3%
August 2026	E. coli, single grab sample	1400 MPN/100mL	≤ 399 CFU/100mL	251%
September 2026	E. coli, single grab sample	1050 MPN/100mL	≤ 399 CFU/100mL	163%

Limits in force (16)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	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	≤ 3 lb/d	all year
Nitrogen, ammonia total [as N]	daily average	≤ 3 mg/L	all year
Nitrogen, ammonia total [as N]	single grab sample	≤ 15 mg/L	all year
Nitrogen, ammonia total [as N]	daily average	≤ .6 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .025 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	single grab sample	≤ 399 CFU/100mL	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 10 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	single grab sample	≤ 35 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 2 lb/d	all year

How strict are these limits?

Solids, total suspended, daily average 15 mg/L — stricter than 35% of 777 other minor industrial and other permits in Texas; 60% have the same limit

Solids, total suspended, single grab sample 60 mg/L — stricter than 15% of 553 other minor industrial and other permits in Texas; 80% have the same limit

Oxygen, dissolved [DO], monthly minimum at least 4 mg/L — stricter than 12% of 627 other minor industrial and other permits in Texas; 69% have the same limit

Your permit document is the final word. As JSON: /api/v1/permits/TX0137634 · MCP: https://passage-data.com/mcp