Clean Water Act discharge permit · NPDES TXR1509VP

MASON PH 1, San Marcos, TX: NPDES TXR1509VP discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

MASON PH 1, held by Qualico Developments (U.S.), Inc., holds NPDES permit TXR1509VP, which discharges to Alligator Creek. EPA’s file records it issued August 19, 2025 and expiring March 4, 2028.

MASON PH 1, San Marcos, Texas: Coverage under a general permit TXR1509VP, held by Qualico Developments (U.S.), Inc.; Construction stormwater; Effective; issued August 19, 2025, term to March 4, 2028; discharges to ALLIGATOR CREEK.

Texas holds 23,986 Construction stormwater coverages of this permit type in EPA’s file; 15,266 were issued before TXR1509VP. Qualico Developments (U.S.), Inc. holds 4 permits in Texas.

Other permits held by Qualico Developments (U.S.), Inc.

PEACHTREE MEADOWS AMENITY CENTER, Rockwall: TXR1527WG, issued October 27, 2025
TRIADA SUBDIVISION PHASE 1, Elgin: TXR1529SV, issued November 22, 2024
LA TERRA AMENITY CENTER, Celina: TXR1552VO, issued August 18, 2025

Coverages issued nearest TXR1509VP

August 19, 2025: LYTLE SUBSTATION, Natalia, TXR1503VP, held by AEP Texas Inc.
August 19, 2025: ROSE HILL ESTATES SECTION II, Willis, TXR1504VP, held by TOP STAR CONSTRUCTION, L.L.C.
August 19, 2025: GENERATION PARK, Houston, TXR1505VP, held by MCCORD DEVELOPMENT, INC.
August 19, 2025: FORNEY GATEWAY WEST, Forney, TXR1506VP, held by Rampart Multifamily, Inc.
August 19, 2025: NEXT LEVEL INDUSTRIAL AND MARINE, Brownsville, TXR1508VP, held by Next Level Industrial & Marine, LLC
August 19, 2025: DELTA ELECTRONICS CAMPUS, Plano, TXR1511VP, held by Sunflower Construction, LLC
August 19, 2025: BRAZOS MOVING AND STORAGE 6, College Station, TXR1512VP, held by Proverb Construction, LLC
August 19, 2025: HORSESHOE BEND PLANT, Waco, TXR1513VP, held by Armadillo Materials, LLC
August 19, 2025: FM 1301 C 1412-1-22 CSJ 1412-01-022, Ashwood, TXR1514VP, held by Texas Department of Transportation
August 19, 2025: CAROLINES HEIGHTS - HB, Corpus Christi, TXR1515VP, held by D.R. Horton - Corpus Christi, LLC

MASON PH 1 among its neighbors

EPA’s permit file holds 50 discharge permits in the Middle York Creek subwatershed (HUC 121002030306), TXR1509VP among them. Its county holds 410, 3 of them major permits; TXR1509VP is a minor permit.

Other permits in the Middle York Creek subwatershed (HUC 121002030306)

COMAL ISD MIDDLE SCHOOL 9, New Braunfels: TXR1569RP, minor permit, discharging to ALLIGATOR CREEK, permit term to March 4, 2028
CONTINENTAL AUTOMOTIVE SYSTEMS, New Braunfels: TXR05GG20, minor permit, permit term to August 13, 2026
CREEKSIDE STATION WWTP, Zorn: TX0139688, minor permit, discharging to Lower San Marcos River, permit term to January 15, 2026
FRONTIER SAN MARCOS, San Marcos: TXR05GG89, minor permit, permit term to August 13, 2026
GRFC PLANT, San Marcos: TXG113987, minor permit, permit term to November 6, 2026
HERITAGE AT COTTONWOOD CREEK, San Marcos: TXR1569QQ, minor permit, discharging to LOWER SAN MARCOS RIVER, permit term to March 4, 2028
HUNTER CEMENT CLAY QUARRY, New Braunfels: TXR05GA55, minor permit, permit term to August 13, 2026
INDEPENDENCE TRIAL WWTP, San Marcos: TX0139131, minor permit, discharging to Lower San Marcos River, permit term to June 14, 2026
INGENIUM GROUP, San Marcos: TXRNEBW99, minor permit, permit term to August 13, 2026
MASON PH 1, San Marcos: TXR1583VP, minor permit, discharging to ALLIGATOR CREEK, permit term to March 4, 2028

What the register holds for MASON PH 1: its NPDES ID, its permit type and status, its dates, its address in San Marcos, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1509VP.

Identity

Facility as filed	MASON PH 1
Permittee as filed	Qualico Developments (U.S.), Inc.
NPDES ID	TXR1509VP
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	August 19, 2025
Expiration date	March 4, 2028
Address	San Marcos, TX 78666
Receiving water	ALLIGATOR CREEK
Subwatershed	Middle York Creek (HUC 121002030306)

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 TXR1509VP.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1509VP.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR1509VP.

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 TXR1509VP.

Watch this permit

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Nearby on the register

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

The MASON PH 1 storm water construction permit, covering a site in San Marcos, Hays County, Texas, is one of 336 such permits in Hays County on EPA's NPDES register, and it sits in the Middle York Creek subwatershed, which holds 50 NPDES permits including this one. Of those 336 Hays County storm water construction permits, 55.4% were issued before this one, and 0.6% have a violation on file, while this permit itself has no pollutants under a numeric limit and no pollutants with an effluent exceedance.