Clean Water Act discharge permit · NPDES TX0139327

MILL CREEK WWTP, City Of Tomball, TX: NPDES TX0139327 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
4Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

MILL CREEK WWTP, held by QUADVEST, LP, holds NPDES permit TX0139327, which discharges to Neidigk Lk;Mill Crk;Spring Crk. EPA’s file records it issued January 6, 2020 and expiring January 6, 2025.

MILL CREEK WWTP, City Of Tomball, Texas: Individual permit TX0139327, held by QUADVEST, LP; Administratively continued (past its expiration date and still in force until reissued); issued January 6, 2020, term to January 6, 2025; discharges to NEIDIGK LK;MILL CRK;SPRING CRK.

Phosphorus, total [as P]: 6 limits, 24 violations of any kind, 21 effluent exceedances, latest January 31, 2026, largest 889% over the limit.
Nitrogen, ammonia total [as N]: 6 limits, 11 violations of any kind, 8 effluent exceedances, latest November 30, 2024, largest 742% over the limit.
E. coli: 2 limits, 8 violations of any kind, 4 effluent exceedances, latest June 30, 2026, largest 1,110% over the limit.
Flow, in conduit or thru treatment plant: 4 limits, 3 violations of any kind, 1 effluent exceedance, latest June 30, 2026, largest 0% over the limit.
Solids, total suspended: 6 limits, 3 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 6 limits, 3 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 2 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 2 limits, 2 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 1 limit, 1 violation of any kind, 0 effluent exceedances.

Other permits held by QUADVEST, LP

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, City Of Katy: TX0141712, issued May 20, 2022

MILL CREEK WWTP among its neighbors

EPA’s permit file holds 74 discharge permits in the Decker Branch-Mill Creek subwatershed (HUC 120401020208), TX0139327 among them. Its county holds 1,439, 16 of them major permits; TX0139327 is a minor permit.

Other permits in the Decker Branch-Mill Creek subwatershed (HUC 120401020208)

ADALINE WOODS, Magnolia: TXR1537XP, minor permit, discharging to UNKNOWN TRIBUTARY, permit term to March 4, 2028
ADERRA CLUBHOUSE, Magnolia: TXR1509YA, minor permit, discharging to UNKNOWN TRIB OF MILL CREEK, permit term to March 4, 2028
ADERRA SENIOR LIVING AT AUDUBON - HOME BUILDING, Magnolia: TXR1591XH, minor permit, discharging to MILL CREEK 1008A, permit term to March 4, 2028
ALLIANCE CONCRETE - CBP1, Pinehurst: TXG113490, minor permit, permit term to November 6, 2026
ALLIANCE CONCRETE - CBP1, Pinehurst: TXR1503MZ, minor permit, discharging to DECKER BRANCH, permit term to March 4, 2028
AUDUBON, Magnolia: TXR1523OZ, minor permit, discharging to MILL CREEK 1008A, permit term to March 4, 2028
AUDUBON, Montgomery: TXR1533XX, minor permit, discharging to SULPHUR BRANCH, permit term to March 4, 2028
AUDUBON, Conroe: TXR1576SW, minor permit, discharging to MILL CREEK, permit term to March 4, 2028
AUDUBON BOULEVARD AND OFFSITE UTILITIES, Magnolia: TXR1566RN, minor permit, discharging to SULPHUR BRANCH, permit term to March 4, 2028
AUDUBON CREEKSIDE NORTH, Magnolia: TXR1578OK, minor permit, discharging to MILL CREEK 1008A, permit term to March 4, 2028

Identity

Facility as filed	MILL CREEK WWTP
Permittee as filed	QUADVEST, LP
NPDES ID	TX0139327
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 6, 2020
Expiration date	January 6, 2025
Address	City Of Tomball, TX 77354
Receiving water	NEIDIGK LK;MILL CRK;SPRING CRK
Subwatershed	Decker Branch-Mill Creek (HUC 120401020208)

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
9With a violation of any kind
4With 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
Phosphorus, total [as P]	6	24	21	January 31, 2026	889% over the limit
Nitrogen, ammonia total [as N]	6	11	8	November 30, 2024	742% over the limit
E. coli	2	8	4	June 30, 2026	1,110% over the limit
Flow, in conduit or thru treatment plant	4	3	1	June 30, 2026	0% over the limit
Solids, total suspended	6	3	0
BOD, carbonaceous [5 day, 20 C]	6	3	0
pH	2	2	0
Chlorine, total residual	2	2	0
Oxygen, dissolved [DO]	1	1	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0139327.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0139327.

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 TX0139327.

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, TX0139327.

Start the watch

How we handle your data → Privacy

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES TX0139327 for MILL CREEK WWTP in City Of Tomball, TX, held by QUADVEST, LP, with its permit status listed as Administratively continued and its discharger class as Minor. The page lists 9 pollutants on file, 9 under a numeric limit, and 4 with an effluent exceedance, and the permit is cited to the EPA ICIS-NPDES permit file for the Decker Branch-Mill Creek (HUC 120401020208) subwatershed.