Clean Water Act discharge permit · NPDES TXR040190

CINCO MUD 9 MS4, Houston, TX: NPDES TXR040190 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
0Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

CINCO MUD 9 MS4, held by Cinco MUD 9, holds NPDES permit TXR040190, which discharges to Willow Fork Channel. EPA’s file records it issued December 27, 2023 and expiring January 23, 2024.

CINCO MUD 9 MS4, Houston, Texas: Coverage under a general permit TXR040190, held by Cinco MUD 9; Small municipal storm sewer systems; Administratively continued (past its expiration date and still in force until reissued); issued December 27, 2023, term to January 23, 2024, by TCEQ; discharges to WILLOW FORK CHANNEL.

July 1, 2026: Focused (S).

Texas holds 199 Small municipal storm sewer systems coverages of this permit type in EPA’s file; 165 were issued before TXR040190.

Coverages issued nearest TXR040190

November 16, 2023: CITY OF NEW BRAUNFELS MS4, New Braunfels, TXR040469, held by City of New Braunfels
November 16, 2023: WOOD TRACE MUD 1 MS4, Houston, TXR040658, held by Wood Trace Municipal Utility District 1
December 14, 2023: CITY OF PALM VALLEY MS4, Palm Valley, TXR040668, held by City of Palm Valley
December 20, 2023: MONTGOMERY COUNTY MUNICIPAL UTILITY DISTRICT 16 MS4, Houston, TXR040649, held by Montgomery County Municipal Utility District 16
December 20, 2023: CITY OF WILMER MS4, Wilmer, TXR040689, held by City of Wilmer
December 27, 2023: WILLOW FORK DRAINAGE DISTRICT MS4, Katy,, TXR040196, held by Willow Fork Drainage District
December 31, 2023: MEADOWS AT CHANDLER CREEK MUD MS4, Austin, TXR040644, held by Meadows at Chandler Creek Municipal Utility District
January 8, 2024: VICTORIA COUNTY DRAINAGE DISTRICT 3 MS4, Victoria, TXR040632, held by Victoria County Drainage District 3
January 11, 2024: KELLY LANE WCID 2 MS4, City Of Pflugerville, TXR040671, held by Kelly Lane Water Control and Improvement District 2
January 19, 2024: CITY OF WEST UNIVERSITY PLACE MS4, West University Place, TXR040392, held by City of West University Place

CINCO MUD 9 MS4 among its neighbors

EPA’s permit file holds 113 discharge permits in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104), TXR040190 among them. Its county holds 1,100, 41 of them major permits; TXR040190 is a minor permit.

Other permits in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104)

66 WATERLINE ALONG KINDER MORGAN CORRIDOR, Katy: TXR1542SS, minor permit, discharging to MASON CREEK, permit term to March 4, 2028
ADDICKS RESERVOIR, Houston: TXR1506XW, minor permit, discharging to BUFFALO BAYOU, permit term to March 4, 2028
ANDRETTI INDOOR KARTING AND GAMES, Katy: TXR15152X, minor permit, discharging to MASON CREEK, permit term to March 4, 2023
BABACAR DIGNE, Katy: TXRNECG75, minor permit, permit term to August 13, 2026
BECK JUNIOR HIGH ADDITIONS AND RENOVATIONS, Katy: TXR1550XP, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
BING SOUTH APARTMENTS, Katy: TXR1517VA, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
BING SOUTH APARTMENTS, Katy: TXR1535VA, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
CASTLEWOOD MUD WWTP, Houston: TX0071625, major permit, discharging to UNNAMED TRIB, MASON CREEK, BUFFALO, permit term to May 1, 2022
CHASE BANK - KATY MARKETPLACE, Katy: TXR1566SP, minor permit, discharging to UNNAMED TRIBUTARY TO MASON CREEK, permit term to March 4, 2028
CIMARRON MUD MS4, Houston: TXR040660, minor permit, discharging to BUFFALO BAYOU, permit term to January 23, 2024

Identity

Facility as filed	CINCO MUD 9 MS4
Permittee as filed	Cinco MUD 9
NPDES ID	TXR040190
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	December 27, 2023
Expiration date	January 23, 2024
Issuing agency	TCEQ
Address	Houston, TX 77027
Receiving water	WILLOW FORK CHANNEL
Subwatershed	Barker Reservoir-Buffalo Bayou (HUC 120401040104)

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 TXR040190.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR040190.

Inspections

Date	What EPA recorded	Agency
July 1, 2026	Focused	S

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 TXR040190.

Watch this permit

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Nearby on the register

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

CINCO MUD 9 MS4 is one of 45 Storm Water Small MS4s permits in Fort Bend County, and its issue date is earlier than that of 75.6% of them. Among the 113 NPDES permits in the Barker Reservoir-Buffalo Bayou subwatershed, this one is included, and about 2.2% of the county's 45 storm water small MS4 permits carry a violation on file. CINCO MUD 9 MS4 has no pollutant with a numeric limit and no pollutant with an effluent exceedance.