Clean Water Act discharge permit · NPDES TX0141712

SUNTERRA WWTP, City Of Katy, TX: NPDES TX0141712 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MajorDischarger class
8Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

SUNTERRA WWTP, held by QUADVEST, LP, holds NPDES permit TX0141712, which discharges to Buffalo Bayou Above Tidal. EPA’s file records it issued May 20, 2022 and expiring May 20, 2027.

SUNTERRA WWTP, City Of Katy, Texas: Individual permit TX0141712, held by QUADVEST, LP; Effective; issued May 20, 2022, term to May 20, 2027; discharges to Buffalo Bayou Above Tidal.

Nitrogen, ammonia total [as N]: 3 limits, 5 violations of any kind, 5 effluent exceedances, latest February 28, 2026, largest 227% over the limit.
Flow, in conduit or thru treatment plant: 4 limits, 0 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 3 limits, 0 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 2 limits, 0 violations of any kind, 0 effluent exceedances.
E. coli: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.

October 9, 2026: Phone Call/ EMAIL (State).

Other permits held by QUADVEST, LP

MILL CREEK WWTP, City Of Tomball: TX0139327, issued January 6, 2020
ROSEHILL MEADOWS WWTP, City Of Tomball: TX0139581, issued April 30, 2021
PINE ACRES WWTP, Montgomery County: TX0139939, issued June 28, 2021
MADERA WWTP, Conroe: TX0140937, issued November 19, 2021

SUNTERRA WWTP among its neighbors

EPA’s permit file holds 61 discharge permits in the Cane Island Branch subwatershed (HUC 120401040102), TX0141712 among them. Its county holds 314, 3 of them major permits; TX0141712 is a major permit.

Other permits in the Cane Island Branch subwatershed (HUC 120401040102)

BAY CITY REGIONAL AIRPORT, Bay City: TXR1595XA, minor permit, discharging to LIVE OAK BAYOU, permit term to March 4, 2028
CANE ISLAND, Katy: TXR1579QP, minor permit, discharging to UNNAMED TRIBUTARY TO CANE ISLAND BRANCH TO BUFFALO, permit term to March 4, 2028
CANE ISLAND SECTION 25, Katy: TXR15114J, minor permit, discharging to SNAKE CREEK, permit term to March 5, 2023
CANE ISLAND SECTION FORTY ONE, Katy: TXR15001V, minor permit, discharging to BUFFALO BAYOU ABOVE TIDAL, permit term to March 4, 2023
CASTLEROCK COMMUNITIES- RESERVE OF CHAMPIONS ESTATES, Mount Belvieu: TXR1522VL, minor permit, discharging to COTTON BAYOU, permit term to March 4, 2028
CHRISTIAN BROTHERS - TRAINING FACILITY, Katy: TXR1555XV, minor permit, discharging to WILLOW FORK BUFFALO BAYOU, permit term to March 4, 2028
CITY OF KATY MS4, Katy Mills: TXR040659, minor permit, permit term to January 24, 2024
CITY OF KATY WWTP, Katy: TX0025747, major permit, discharging to CANE ISLAND BRANCH, UNCLASSIFIED PO, permit term to May 1, 2022
CONCRETE BATCH PLANT 6, Katy: TXG110344, minor permit, permit term to November 7, 2011
DXP ENTERPRISES, Katy: TXR05FJ47, minor permit, permit term to August 13, 2026

Identity

Facility as filed	SUNTERRA WWTP
Permittee as filed	QUADVEST, LP
NPDES ID	TX0141712
Permit status	Effective
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	May 20, 2022
Expiration date	May 20, 2027
Address	City Of Katy, TX 77493
Receiving water	Buffalo Bayou Above Tidal
Subwatershed	Cane Island Branch (HUC 120401040102)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
1With a violation of any kind
1With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Nitrogen, ammonia total [as N]	3	5	5	February 28, 2026	227% over the limit
Flow, in conduit or thru treatment plant	4	0	0
Solids, total suspended	3	0	0
BOD, carbonaceous [5 day, 20 C]	3	0	0
pH	2	0	0
Chlorine, total residual	2	0	0
E. coli	2	0	0
Oxygen, dissolved [DO]	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0141712.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0141712.

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

Date	What EPA recorded	Agency
October 9, 2026	Phone Call/ EMAIL	State

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

This public-records page covers the Clean Water Act discharge permit NPDES TX0141712 for the SUNTERRA WWTP in City Of Katy, TX, held by QUADVEST, LP, with a status of Effective and a Major discharger class. The facts list 8 pollutants on file, 8 under a numeric limit, and 1 pollutant with an effluent exceedance.