Clean Water Act discharge permit · NPDES TX0135194

CINCO MUD 1 REVERSE OSMOSIS WTP, Katy Mills, TX: NPDES TX0135194 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

CINCO MUD 1 REVERSE OSMOSIS WTP, held by CINCO MUD 1, holds NPDES permit TX0135194, which discharges to Willow Fork Diversion Ditch;Buffalo Bayou. EPA’s file records it issued May 9, 2017 and expiring May 1, 2022.

CINCO MUD 1 REVERSE OSMOSIS WTP, Katy Mills, Texas: Individual permit TX0135194, held by CINCO MUD 1; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued May 9, 2017, term to May 1, 2022; discharges to WILLOW FORK DIVERSION DITCH;BUFFALO BAYOU.

Solids, total dissolved: 2 limits, 6 violations of any kind, 6 effluent exceedances, latest January 31, 2026, largest 12% over the limit.
Chloride [as Cl]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Sulfate, total [as SO4]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 1 limit, 0 violations of any kind, 0 effluent exceedances.

Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 458 were issued before TX0135194. CINCO MUD 1 holds 3 permits in Texas.

Other permits held by CINCO MUD 1

CINCO MUD NO 1 CENTRAL WWTP, Katy: TX0098957, issued June 20, 2018
CINCO RANCH SOUTH WWTF, Fort Bend County: TX0098965, issued August 28, 2017

Coverages issued nearest TX0135194

May 8, 2017: CENTERVILLE WWTP, Centerville, TX0077810, held by CENTERVILLE, CITY OF
May 9, 2017: CITY OF JEWETT WWTP, Jewett, TX0074683, held by CITY OF JEWETT
May 9, 2017: TDCJ BETO UNIT WWTP, Anderson County, TX0075388, held by TEXAS DEPARTMENT OF CRIMINAL JUSTICE
May 9, 2017: WEST HARRIS COUNTY MUD 17, Houston, TX0084468
May 9, 2017: NORTHWEST HARRIS COUNTY MUD 29 WWTP, Houston, TX0093726, held by NORTHWEST HARRIS COUNTY MUNICIPAL UTILITY DISTRIT 29
May 11, 2017: CITY OF KERENS WWTP, Kerens, TX0023027, held by KERENS, CITY OF
May 11, 2017: WEST HARRIS COUNTY MUD 15 WWTP, Houston, TX0083496, held by WEST HARRIS COUNTY MUD 15
May 16, 2017: CITY OF BARDWELL WWTP, Bardwell, TX0026581, held by CITY OF BARDWELL
May 24, 2017: TDJC COFFIELD UNIT, Anderson County, TX0031577, held by TEXAS DEPARTMENT OF CRIMINAL JUSTICE
May 24, 2017: KATY ISD MAYDE CREEK WWTP, Katy, TX0079201, held by KATY ISD

CINCO MUD 1 REVERSE OSMOSIS WTP among its neighbors

EPA’s permit file holds 113 discharge permits in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104), TX0135194 among them. Its county holds 1,100, 41 of them major permits; TX0135194 is a minor permit.

Other permits in the Barker Reservoir-Buffalo Bayou subwatershed (HUC 120401040104)

66 WATERLINE ALONG KINDER MORGAN CORRIDOR, Katy: TXR1542SS, minor permit, discharging to MASON CREEK, permit term to March 4, 2028
ADDICKS RESERVOIR, Houston: TXR1506XW, minor permit, discharging to BUFFALO BAYOU, permit term to March 4, 2028
ANDRETTI INDOOR KARTING AND GAMES, Katy: TXR15152X, minor permit, discharging to MASON CREEK, permit term to March 4, 2023
BABACAR DIGNE, Katy: TXRNECG75, minor permit, permit term to August 13, 2026
BECK JUNIOR HIGH ADDITIONS AND RENOVATIONS, Katy: TXR1550XP, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
BING SOUTH APARTMENTS, Katy: TXR1517VA, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
BING SOUTH APARTMENTS, Katy: TXR1535VA, minor permit, discharging to BUFFALO BAYOU/BARKER RESERVOIR, permit term to March 4, 2028
CASTLEWOOD MUD WWTP, Houston: TX0071625, major permit, discharging to UNNAMED TRIB, MASON CREEK, BUFFALO, permit term to May 1, 2022
CHASE BANK - KATY MARKETPLACE, Katy: TXR1566SP, minor permit, discharging to UNNAMED TRIBUTARY TO MASON CREEK, permit term to March 4, 2028
CIMARRON MUD MS4, Houston: TXR040660, minor permit, discharging to BUFFALO BAYOU, permit term to January 23, 2024

Identity

Facility as filed	CINCO MUD 1 REVERSE OSMOSIS WTP
Permittee as filed	CINCO MUD 1
NPDES ID	TX0135194
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	May 9, 2017
Expiration date	May 1, 2022
Address	Katy Mills, TX 77450
Receiving water	WILLOW FORK DIVERSION DITCH;BUFFALO BAYOU
Subwatershed	Barker Reservoir-Buffalo Bayou (HUC 120401040104)
SIC	4941 – Water Supply

Effluent limits and exceedances

6Pollutants on file
6Under a numeric limit
2With 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
Solids, total dissolved	2	6	6	January 31, 2026	12% over the limit
Chloride [as Cl]	2	2	0
pH	2	0	0
Sulfate, total [as SO4]	2	0	0
Flow, in conduit or thru treatment plant	2	0	0
Chlorine, total residual	1	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0135194.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0135194.

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 TX0135194.

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

This public-records page covers Clean Water Act discharge permit NPDES TX0135194, held by CINCO MUD 1 for its reverse osmosis water treatment plant in Katy Mills, TX, which discharges to Willow Fork Diversion Ditch and Buffalo Bayou. The permit is listed as administratively continued, with 6 for discharger class and 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance.