Clean Water Act discharge permit · NPDES TXR1577OF

A21-230D DFW WALNUT HILL, Dallas, TX: NPDES TXR1577OF discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance

A21-230D DFW WALNUT HILL, held by Atmos Energy Corporation, holds NPDES permit TXR1577OF, which discharges to Estelle Creek. EPA’s file records it issued September 4, 2023 and expiring March 4, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for A21-230D DFW WALNUT HILL: its NPDES ID, its permit type and status, its dates, its address in Dallas, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1577OF.

Identity

Facility as filed	A21-230D DFW WALNUT HILL
Permittee as filed	Atmos Energy Corporation
NPDES ID	TXR1577OF
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	September 4, 2023
Expiration date	March 4, 2028
Address	Dallas, TX 75229
Receiving water	ESTELLE CREEK
Subwatershed	Estelle Creek-Bear Creek (HUC 120301020705)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

0Pollutants on file
0Under a numeric limit
0With a violation of any kind
0With an effluent exceedance

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR1577OF.

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1577OF.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TXR1577OF.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TXR1577OF there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit TXR1577OF for the A21-230D DFW WALNUT HILL facility in Dallas, TX, held by Atmos Energy Corporation, which discharges to Estelle Creek under an effective construction stormwater coverage issued September 4, 2023 and expiring March 4, 2028. The page lists 0 pollutants under a numeric limit, 0 pollutants with an effluent exceedance, and a Minor Discharger class. Status and dates reflect EPA's permit file as loaded on September 15, 2026.