Who issues NPDES permits in Texas?

Texas Commission on Environmental Quality issues and enforces NPDES permits for wastewater discharges in Texas. Klarifi tracks 1,220 permits held by publicly owned treatment plants in the state.

How many NPDES permits in Texas are expired or administratively continued?

173 permits are administratively continued (the plant applied for renewal and the old permit stays in force) and 12 are recorded as expired, out of 1,220 permits tracked. 1,033 are effective.

How many Texas wastewater permits come up for renewal soon?

156 in 2026, 244 in 2027 and 219 in 2028. Each year has its own renewal calendar with the plants listed.

How do I look up an NPDES permit number?

Enter the permit number (two letters and seven characters, for example TX0021873) or the plant name in the lookup on the NPDES page; each result opens the plant profile with status, expiry, design flow and the three-year violation count.

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NPDES permits in Texas

Name: NPDES permits held by wastewater treatment plants in Texas
Creator: Klarifi
License: https://klarifi.io/terms-of-service

1,220 permits held by publicly owned wastewater treatment plants · issued by TCEQ

Effective

1,033

Administratively continued

173

Expired

Total tracked

1,220

Texas Commission on Environmental Quality (TCEQ) runs the NPDES program in Texas under delegation from EPA Region 6, issuing and enforcing the discharge permits listed here. Klarifi tracks 1,220 permits held by publicly owned treatment plants in the state, with status, expiry, design flow and three-year compliance for each. Agency website →

An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.

Permit renewals by year

2026: 156 permits →2027: 244 permits →2028: 219 permits →

2029: 208 permits

2030: 182 permits

2031: 126 permits

Largest permit holders in Texas

The 25 largest publicly owned wastewater treatment plants in Texas by permitted design flow, with NPDES permit number, status and expiry. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Status	Expires	Violations (3y)
Harris Co Mud 525 WWTP	Crosby	0.08	390	TX0136816	Administratively continued	May 2025	0
City Of Dallas Central WWTP	Dallas	104	200	TX0047830	Effective	Apr 2027	10
Village Creek Reclamation Facility	Arlington	142	166	TX0047295	Effective	Jan 2029	3
Dos Rios Water Recycling Center	San Antonio	105.32	125	TX0077801	Administratively continued	Jun 2025	48
Walnut Creek WWTP	Austin	56.6	100	TX0046981	Administratively continued	Mar 2025	0
South Austin Regional WWTP Electrical	Del Valle	43.8	75	TX0071889	Effective	Jun 2031	0
Southwest WWTP	Houston	50.14	60	TX0062995	Effective	Sep 2027	68
Hillebrandt WWTP	Beaumont	47.3	46	TX0046990	Effective	Apr 2029	24
Leon Creek Water Recycling Center	San Antonio	32	46	TX0052639	Effective	Jul 2027	5
Salado Creek WWTP	San Antonio	—	46	TX0052647	Effective	May 2031	—
Waco Metropolitan Area Regional Sewarge System	Waco	21.83	45	TX0026506	Effective	Jul 2030	48
South Mesquite Regional Wastewater Treatment Plant	Mesquite	37.57	41	TX0047431	Effective	Aug 2027	23
Roberto R Bustamante WWTP	El Paso	32.92	39	TX0101605	Effective	Apr 2030	35
City Of Houston Sims Bayou South	Houston	—	36	TX0105058	Administratively continued	May 2000	1
Almeda Sims WWTP	Houston	12.85	28	TX0034924	Effective	Mar 2030	15
Haskell R. Street Wastewater Treatment Plant	El Paso	12.08	27.7	TX0026751	Effective	May 2030	2
West District WWTF	Houston	9.01	26.4	TX0063002	Effective	Jul 2029	13
Brushy Creek Regional Wastewater System - East	Round Rock	20.77	25	TX0101940	Effective	Jan 2029	33
City Of Houston	Houston	28.8	25	TX0062201	Administratively continued	Aug 2002	3
City Of Garland Rowlett Creek WWTF	Garland	22.38	24	TX0024686	Effective	Oct 2030	6
Oso WWTP	Corpus Christi	16.32	24	TX0047058	Administratively continued	Sep 2025	1
Wilson Creek Regional Wastewater Treatment Plant	Mc Kinney	70.77	24	TX0047911	Effective	Oct 2027	24
Keegans Bayou WWTP	Houston	11.12	23.1	TX0098191	Administratively continued	Jun 2026	11
City Of Longview Main WWTP	Longview	13.3	21	TX0022217	Effective	Sep 2026	11
Pecan Creek Water Reclamation Plant	Denton	30.27	21	TX0047180	Effective	Jul 2028	8

All 1,220 plants in Texas →

NPDES permits in Texas: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed September 11, 2026.

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