Clean Water Act discharge permit · NPDES TXR040432

PARKSIDE AT MAYFIELD RANCH MUD MS4, Austin, TX: NPDES TXR040432 discharge permit, effluent exceedances, inspections, penalties

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

PARKSIDE AT MAYFIELD RANCH MUD MS4, held by Parkside at Mayfield Ranch MUD, holds NPDES permit TXR040432, which discharges to Unnamed Tributary. 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 (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for PARKSIDE AT MAYFIELD RANCH MUD MS4: its NPDES ID, its permit type and status, its dates, its address in Austin, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR040432.

Identity

Facility as filed	PARKSIDE AT MAYFIELD RANCH MUD MS4
Permittee as filed	Parkside at Mayfield Ranch MUD
NPDES ID	TXR040432
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	Austin, TX 78701
Receiving water	UNNAMED TRIBUTARY
Subwatershed	South Brushy Creek-Brushy Creek (HUC 120702050401)

Cited to the EPA ICIS-NPDES permit file (ECHO 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 TXR040432.

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR040432.

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

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, TXR040432.

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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 TXR040432 there.

Nearby on the register

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

The PARKSIDE AT MAYFIELD RANCH MUD MS4 permit is one of 11 Storm Water Small MS4s permits in Williamson County, and 18.2% of those 11 were issued earlier than this one. Among its peers, 63.6% of the county's 11 Storm Water Small MS4s permits have a violation on file, whereas this permit has none of the recorded pollutants exceeding a numeric limit or an effluent exceedance. The permit also sits among 159 NPDES permits in the South Brushy Creek-Brushy Creek subwatershed, this one included.