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Clean Water Act discharge permit · NPDES TXR1548PW

WHISPER, San Marcos, TX: NPDES TXR1548PW discharge permit, effluent exceedances, inspections, penalties

WHISPER, held by Groundworks Ess, LLC, holds NPDES permit TXR1548PW, which discharges to Lower San Marcos River. EPA’s file records it issued February 9, 2024 and expiring March 4, 2028.

WHISPER, San Marcos, Texas: Coverage under a general permit TXR1548PW, held by Groundworks Ess, LLC; Construction stormwater; Effective; issued February 9, 2024, term to March 4, 2028; discharges to LOWER SAN MARCOS RIVER.

Texas holds 23,986 Construction stormwater coverages of this permit type in EPA’s file; 5,899 were issued before TXR1548PW. Groundworks Ess, LLC holds 33 permits in Texas.

Other permits held by Groundworks Ess, LLC

Coverages issued nearest TXR1548PW

WHISPER among its neighbors

EPA’s permit file holds 48 discharge permits in the Morrison Creek-San Marcos River subwatershed (HUC 121002030304), TXR1548PW among them. Its county holds 410, 3 of them major permits; TXR1548PW is a minor permit.

Other permits in the Morrison Creek-San Marcos River subwatershed (HUC 121002030304)

What the register holds for WHISPER: 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 TXR1548PW.

Identity

Facility as filedWHISPER
Permittee as filedGroundworks Ess, LLC
NPDES IDTXR1548PW
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedFebruary 9, 2024
Expiration dateMarch 4, 2028
AddressSan Marcos, TX 78666
Receiving waterLOWER SAN MARCOS RIVER
SubwatershedMorrison Creek-San Marcos River (HUC 121002030304)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR1548PW.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR1548PW.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR1548PW.

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 TXR1548PW.

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, TXR1548PW.

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  • One state — $4,990/year
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Nearby on the register

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

What this page shows

The WHISPER storm water construction permit (NPDES ID TXR1548PW), held by Groundworks Ess, LLC in San Marcos, Hays County, Texas, is one of 336 such permits in Hays County, and 0.6% of those 336 carry a violation on file. It sits within a subwatershed that contains 48 NPDES permits, this one included, and it lists no pollutants under a numeric limit and none with an effluent exceedance.