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Clean Water Act discharge permit · NPDES TXR040655

SIENNA MUD 4, Houston, TX: NPDES TXR040655 discharge permit, effluent exceedances, inspections, penalties

SIENNA MUD 4, held by Sienna Municipal Utility District 4, holds NPDES permit TXR040655, which discharges to Oyster Creek Above Tidal. EPA’s file records it issued June 21, 2023 and expiring January 23, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for SIENNA MUD 4: its NPDES ID, its permit type and status, its dates, its address in Houston, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR040655.

Identity

Facility as filedSIENNA MUD 4
Permittee as filedSienna Municipal Utility District 4
NPDES IDTXR040655
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
IssuedJune 21, 2023
Expiration dateJanuary 23, 2024
Issuing agencyTCEQ
AddressHouston, TX 77027
Receiving waterOYSTER CREEK ABOVE TIDAL
SubwatershedDry Bayou-Brazos River (HUC 120701040409)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXR040655.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR040655.

Inspections

EPA’s inspection file holds no inspection for NPDES TXR040655.

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 TXR040655.

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

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, TXR040655.

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How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 TXR040655 there.

SIENNA MUD 4, Houston, Texas: Coverage under a general permit TXR040655, held by Sienna Municipal Utility District 4; Small municipal storm sewer systems; Administratively continued (past its expiration date and still in force until reissued); issued June 21, 2023, term to January 23, 2024, by TCEQ; discharges to OYSTER CREEK ABOVE TIDAL.

Texas holds 199 Small municipal storm sewer systems coverages of this permit type in EPA’s file; 31 were issued before TXR040655.

Coverages issued nearest TXR040655

SIENNA MUD 4 among its neighbors

17 discharge permits are in the Dry Bayou-Brazos River subwatershed (HUC 120701040409); TXR040655 is one.

Other permits in the Dry Bayou-Brazos River subwatershed (HUC 120701040409)

Nearby on the register

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

What this page shows

SIENNA MUD 4 is one of 1 storm water small ms4s permits on EPA's NPDES register in Houston. It is one of 17 NPDES permits in the Dry Bayou-Brazos River subwatershed. The permit has 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.