Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES TX0135666

MERENCO WWTP, Tomball, TX: NPDES TX0135666 discharge permit, effluent exceedances, inspections, penalties

MERENCO WWTP, held by AQUA TEXAS INC, holds NPDES permit TX0135666, which discharges to Unnamed Tributary; Willow Ck; Spring Ck. EPA’s file records it issued April 16, 2018 and expiring April 16, 2023. 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.

What the register holds for MERENCO WWTP: its NPDES ID, its permit type and status, its dates, its address in Tomball, Texas, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TX0135666.

Identity

Facility as filedMERENCO WWTP
Permittee as filedAQUA TEXAS INC
NPDES IDTX0135666
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedApril 16, 2018
Expiration dateApril 16, 2023
AddressTomball, TX 77375
Receiving waterUNNAMED TRIBUTARY; WILLOW CK; SPRING CK
SubwatershedWillow Creek (HUC 120401020210)
SIC4952 – Sewerage Systems

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

EPA’s limits and effluent violation files hold no pollutant row for NPDES TX0135666.

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 TX0135666.

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, TX0135666.

Start the watch

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 TX0135666 there.

Nearby on the register

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

What this page shows

The MERENCO WWTP permit, NPDES ID TX0135666, is one of 488 individual permits in Harris County, Texas, and it is held by AQUA TEXAS INC for the facility in Tomball. Its subwatershed, Willow Creek, contains 137 NPDES permits, this one included, and 46.4% of the 429 individual permits in Harris County were issued before this permit's April 16, 2018 date. The permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance.