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Clean Water Act discharge permit · NPDES TXR1571TX

FRONTERA SUBSTATION EXPANSION PROJECT, Mission, TX: NPDES TXR1571TX discharge permit, effluent exceedances, inspections, penalties

FRONTERA SUBSTATION EXPANSION PROJECT, held by AEP Texas Inc., holds NPDES permit TXR1571TX, which discharges to Drainage Ditches Flowing Into Arroyo Colorado Abov. EPA’s file records it issued March 12, 2025 and expiring March 4, 2028.

FRONTERA SUBSTATION EXPANSION PROJECT, Mission, Texas: Coverage under a general permit TXR1571TX, held by AEP Texas Inc.; Construction stormwater; Effective; issued March 12, 2025, term to March 4, 2028; discharges to DRAINAGE DITCHES FLOWING INTO ARROYO COLORADO ABOV.

Texas holds 23,986 Construction stormwater coverages of this permit type in EPA’s file; 12,128 were issued before TXR1571TX. AEP Texas Inc. holds 50 permits in Texas.

Other permits held by AEP Texas Inc.

Coverages issued nearest TXR1571TX

FRONTERA SUBSTATION EXPANSION PROJECT among its neighbors

EPA’s permit file holds 185 discharge permits in the Llano Grande Lake-Arroyo Colorado subwatershed (HUC 121102080100), TXR1571TX among them. Its county holds 439, 16 of them major permits; TXR1571TX is a minor permit.

Other permits in the Llano Grande Lake-Arroyo Colorado subwatershed (HUC 121102080100)

What the register holds for FRONTERA SUBSTATION EXPANSION PROJECT: its NPDES ID, its permit type and status, its dates, its address in Mission, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1571TX.

Identity

Facility as filedFRONTERA SUBSTATION EXPANSION PROJECT
Permittee as filedAEP Texas Inc.
NPDES IDTXR1571TX
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedMarch 12, 2025
Expiration dateMarch 4, 2028
AddressMission, TX 78572
Receiving waterDRAINAGE DITCHES FLOWING INTO ARROYO COLORADO ABOV
Receiving water impaired303(D) Listed
SubwatershedLlano Grande Lake-Arroyo Colorado (HUC 121102080100)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR1571TX.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1571TX.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR1571TX.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES TXR1571TX.

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, TXR1571TX.

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Nearby on the register

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

What this page shows

The FRONTERA SUBSTATION EXPANSION PROJECT, a storm water construction permit held by AEP Texas Inc. in Mission, Hidalgo County, Texas, is one of 301 such permits in the county on EPA's NPDES register. Of those 301 permits, 0.0% have a violation on file, and this permit has none of the recorded pollutants under a numeric limit or effluent exceedances. Among 185 NPDES permits in the Llano Grande Lake-Arroyo Colorado subwatershed, this permit is included, and 35.9% of all the county's storm water construction permits were issued earlier than this one.