Clean Water Act discharge permit · NPDES TX0141577

HARRIS COUNTY MUD 558 WWTF, Tomball, TX: NPDES TX0141577 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
8Pollutants under a numeric limit
0Pollutants with an effluent exceedance

HARRIS COUNTY MUD 558 WWTF, held by HARRIS COUNTY MUD 558, holds NPDES permit TX0141577, which discharges to Little Cypress Creek. EPA’s file records it issued September 9, 2022 and expiring September 9, 2027. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for HARRIS COUNTY MUD 558 WWTF: its NPDES ID, its permit type and status, its dates, its address in Tomball, Texas, its receiving water, and 8 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TX0141577.

Identity

Facility as filed	HARRIS COUNTY MUD 558 WWTF
Permittee as filed	HARRIS COUNTY MUD 558
NPDES ID	TX0141577
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 9, 2022
Expiration date	September 9, 2027
Address	Tomball, TX 77375
Receiving water	Little Cypress Creek
Subwatershed	Little Cypress Creek (HUC 120401020105)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
0With 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
Solids, total suspended	3	0	0
Nitrogen, ammonia total [as N]	3	0	0
BOD, carbonaceous [5 day, 20 C]	3	0	0
pH	2	0	0
Flow, in conduit or thru treatment plant	2	0	0
Chlorine, total residual	2	0	0
E. coli	2	0	0
Oxygen, dissolved [DO]	1	0	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES TX0141577.

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0141577.

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, TX0141577.

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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 TX0141577 there.

Nearby on the register

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

This public-records page covers NPDES permit TX0141577 held by HARRIS COUNTY MUD 558 for its WWTF in Tomball, TX, which discharges to Little Cypress Creek, and lists its status as Effective with a Minor discharger class. The figures listed are 8 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.