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Clean Water Act discharge permit · NPDES TXR040485

CITY OF SAN MARCOS MS4, San Marcos, TX: NPDES TXR040485 discharge permit, effluent exceedances, inspections, penalties

CITY OF SAN MARCOS MS4, held by City of San Marcos, holds NPDES permit TXR040485, which discharges to San Marcos River. EPA’s file records it issued September 30, 2022 and expiring January 23, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedCITY OF SAN MARCOS MS4
Permittee as filedCity of San Marcos
NPDES IDTXR040485
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramSmall municipal storm sewer systems
IssuedSeptember 30, 2022
Expiration dateJanuary 23, 2024
Issuing agencyTCEQ
AddressSan Marcos, TX 78666
Receiving waterSAN MARCOS RIVER
SubwatershedPurgatory Creek-San Marcos River (HUC 121002030302)
SIC9199 – General Government

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR040485.

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

DateWhat EPA recordedAgency
November 19, 2024Permit Violations - Violation Specified in CommentST6

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.

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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 TXR040485 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES TXR040485, held by the City of San Marcos for its small municipal storm sewer system and discharging to the San Marcos River. The page lists the permit as administratively continued, a minor discharger class, with 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance. The permit's listed issue date is September 30, 2022, and its expiration date is January 23, 2024.