Clean Water Act discharge permit · NPDES TXR1506TY

AVALON GARDENS, Hempstead, TX: NPDES TXR1506TY discharge permit, effluent exceedances, inspections, penalties

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

AVALON GARDENS, held by Sienna Ventures, LLC, holds NPDES permit TXR1506TY, which discharges to Brazos River Below Navasota River. EPA’s file records it issued March 13, 2025 and expiring March 4, 2028. 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 AVALON GARDENS: its NPDES ID, its permit type and status, its dates, its address in Hempstead, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXR1506TY.

Identity

Facility as filed	AVALON GARDENS
Permittee as filed	Sienna Ventures, LLC
NPDES ID	TXR1506TY
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Construction stormwater
Issued	March 13, 2025
Expiration date	March 4, 2028
Address	Hempstead, TX 77445
Receiving water	BRAZOS RIVER BELOW NAVASOTA RIVER
Subwatershed	Lewisville Creek-Brazos River (HUC 120701040106)

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 TXR1506TY.

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 TXR1506TY.

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, TXR1506TY.

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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 TXR1506TY there.

Nearby on the register

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

AVALON GARDENS is one of 208 storm water construction permits on EPA's NPDES register in Waller County, and it sits among 12 NPDES permits in the Lewisville Creek-Brazos River subwatershed, this one included. Of all 208 Waller County storm water construction permits, 32.7% carry an earlier issue date than this one, and 0.5% of those 208 have a violation on file. The permit itself records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.