Clean Water Act discharge permit · NPDES TX0138584

SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY, New Hope, TX: NPDES TX0138584 discharge permit, effluent exceedances, inspections, penalties

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

SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY, held by NORTH TEXAS MUNICIPAL WATER DISTRICT, holds NPDES permit TX0138584, which discharges to Lavon Lake. EPA’s file records it issued March 11, 2020 and expiring March 11, 2025.

SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY, New Hope, Texas: Individual permit TX0138584, held by NORTH TEXAS MUNICIPAL WATER DISTRICT; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 11, 2020, term to March 11, 2025; discharges to Lavon Lake.

Flow, in conduit or thru treatment plant: 0 limits, 12 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 0 limits, 9 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 0 limits, 9 violations of any kind, 0 effluent exceedances.
BOD, carbonaceous [5 day, 20 C]: 0 limits, 9 violations of any kind, 0 effluent exceedances.
pH: 0 limits, 6 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 0 limits, 6 violations of any kind, 0 effluent exceedances.
E. coli: 0 limits, 6 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 0 limits, 2 violations of any kind, 0 effluent exceedances.
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 0 limits, 2 violations of any kind, 0 effluent exceedances.

September 14, 2026: Phone Call/ EMAIL (State).

Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,328 were issued before TX0138584. NORTH TEXAS MUNICIPAL WATER DISTRICT holds 4 permits in Texas.

Other permits held by NORTH TEXAS MUNICIPAL WATER DISTRICT

FLOYD BRANCH REGIONAL WWTP, Richardson: TX0023931, issued October 8, 2020
MUDDY CREEK REGIONAL WWTP, Wylie: TX0123561, issued March 17, 2020
SABINE CREEK REGIONAL WWTP, Rockwall County: TX0126110, issued June 22, 2021

Coverages issued nearest TX0138584

March 11, 2020: CITY OF BRAZORIA WWTP, Brazoria, TX0025615, held by BRAZORIA, CITY OF
March 11, 2020: SEADRIFT WWTP, Seadrift, TX0026671, held by SEADRIFT, CITY OF
March 11, 2020: CITY OF SOUTH HOUSTON WWTP, South Houston, TX0057304, held by SOUTH HOUSTON, CITY OF
March 11, 2020: BRUSHY WEST REGIONAL WWTP, Round Rock, TX0075167, held by ROUND ROCK, CEDAR PARK, LEANDER, AUSTIN, OF CITIES
March 11, 2020: CITY OF OGLESBY WWTP, Oglesby, TX0100854, held by OGLESBY, CITY OF
March 11, 2020: MONTGOMERY COUNTY MUD 144 WWTP, Conroe, TX0139301, held by MONTGOMERY COUNTY MUD NO 144
March 12, 2020: CITY OF CUERO WWTP, Cuero, TX0024244, held by CUERO, CITY OF
March 12, 2020: CITY OF LA VERNIA WWTP, La Vernia, TX0052850, held by LA VERNIA, CITY OF
March 12, 2020: PETTUS MUD WWTP, Pettus, TX0054780, held by PETTUS MUD
March 12, 2020: CITY OF ALAMO WWTP, Alamo, TX0057622, held by ALAMO, CITY OF

SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY among its neighbors

EPA’s permit file holds 35 discharge permits in the Stiff Creek-Sister Grove Creek subwatershed (HUC 120301060303), TX0138584 among them. Its county holds 1,523, 14 of them major permits; TX0138584 is a major permit.

Other permits in the Stiff Creek-Sister Grove Creek subwatershed (HUC 120301060303)

3836P SICILY BATCH PLANT PHASE 1, Princeton: TXR1566NA, minor permit, discharging to UNNAMED TRIBUTARY OF LAKE LAVON, permit term to March 4, 2028
6816 LOVE CT WATERSTONE ESTATES - HOME BUILDING, Mckinney: TXR1597YP, minor permit, discharging to SISTER GROVE CREEK, permit term to March 4, 2028
BIZ PARK, Melissa: TXR1516VQ, minor permit, discharging to UNNAMED TRIBUTARY OF BRINLEE BRANCH, permit term to March 4, 2028
BROOKFIELD, Melissa: TXR1589SF, minor permit, discharging to UNNAMED TRIBUTARY OF STIFF CREEK, permit term to March 4, 2028
BROOKFIELD AMENITY CENTER, Melissa: TXR1578YK, minor permit, discharging to UNNAMED TRIBUTARY OF STIFF CREEK, permit term to March 4, 2028
CAMBRIDGE MEADOWS WWTP, Mckinney: TX0138428, minor permit, discharging to UNNAMED TRIB;STIFF CRK;SISTER GROVE CRK;SITE 12, permit term to October 29, 2024
CONCRETE BATCH PLANT SUPPORTING 4761P SICILY PH 2, Princeton: TXR1527TK, minor permit, discharging to UNNAMED TRIBUTARY OF LAKE LAVON, permit term to March 4, 2028
CONCRETE BATCH PLANT SUPPORTING WESTRIDGE PH 1A, Mckinney: TXR1560RJ, minor permit, discharging to STIFF CREEK, permit term to March 4, 2028
EASTRIDGE PH 4, Princeton: TXR1504VC, minor permit, discharging to TRIBUTARY OF STIFF CREEK, permit term to March 4, 2028
EASTRIDGE PH 8, Princeton: TXR1514XI, minor permit, discharging to TRIBUTARY OF STIFF CREEK, permit term to March 4, 2028

Identity

Facility as filed	SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY
Permittee as filed	NORTH TEXAS MUNICIPAL WATER DISTRICT
NPDES ID	TX0138584
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	March 11, 2020
Expiration date	March 11, 2025
Address	New Hope, TX 75071
Receiving water	Lavon Lake
Subwatershed	Stiff Creek-Sister Grove Creek (HUC 120301060303)
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

16Pollutants on file
0Under a numeric limit
16With a violation of any kind
0With 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
Flow, in conduit or thru treatment plant	0	12	0
Solids, total suspended	0	9	0
Nitrogen, ammonia total [as N]	0	9	0
BOD, carbonaceous [5 day, 20 C]	0	9	0
pH	0	6	0
Phosphorus, total [as P]	0	6	0
E. coli	0	6	0
Oxygen, dissolved [DO]	0	3	0
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas	0	2	0
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	0	2	0
IC25 Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas	0	2	0
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	0	2	0
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	0	2	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES TX0138584.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0138584.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0138584.

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
September 14, 2026	Phone Call/ EMAIL	State

Watch this permit

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Nearby on the register

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

SISTER GROVE REGIONAL WATER RESOURCE RECOVERY FACILITY is one of 22 POTW permits on EPA's NPDES register in Collin County. Of all 21 POTW permits in Collin County, 76.2% have an earlier issue date than this permit. The permit is one of 35 NPDES permits in the Stiff Creek-Sister Grove Creek subwatershed.