Clean Water Act discharge permit · NPDES TXR040320

BIG OAKS MUD MS4, Houston, TX: NPDES TXR040320 discharge permit, effluent exceedances, inspections, penalties

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

BIG OAKS MUD MS4, held by Big Oaks Municipal Utility District, holds NPDES permit TXR040320, which discharges to Buffalo Bayou. EPA’s file records it issued August 24, 2023 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 filed	BIG OAKS MUD MS4
Permittee as filed	Big Oaks Municipal Utility District
NPDES ID	TXR040320
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Small municipal storm sewer systems
Issued	August 24, 2023
Expiration date	January 23, 2024
Issuing agency	TCEQ
Address	Houston, TX 77040
Receiving water	BUFFALO BAYOU
Subwatershed	Keegans Bayou-Brays Bayou (HUC 120401040401)
SIC	1623 – Water, Sewer, And Utility Lines

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

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 TXR040320.

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

1Single-event violations

Date	What EPA recorded	Agency
July 26, 2024	Permit Violations - Violation Specified in Comment	ST6

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

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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 TXR040320 there.

Nearby on the register

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

This public-records page covers NPDES permit TXR040320 for BIG OAKS MUD MS4 in Houston, TX, held by Big Oaks Municipal Utility District under the small municipal storm sewer systems program, with the permit shown as administratively continued. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, and it classes the discharger as minor. The permit's issue date of August 24, 2023 and expiration date of January 23, 2024 are as EPA's file stood when the record was loaded on October 14, 2026.