Clean Water Act discharge permit · NPDES TX0136484

HARRIS COUNTY MUD NO 438, Cypress, TX: NPDES TX0136484 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
8Pollutants under a numeric limit
7Pollutants with an effluent exceedance

HARRIS COUNTY MUD NO 438 holds NPDES permit TX0136484, which discharges to Langham Crk;Bear Crk;South Mayde Crk;Buffalo Bayou. EPA’s file records it issued June 14, 2018 and expiring June 14, 2023. 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.

Identity

Facility as filed	HARRIS COUNTY MUD NO 438
Permittee as filed	HARRIS COUNTY MUD NO 438
NPDES ID	TX0136484
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	June 14, 2018
Expiration date	June 14, 2023
Address	Cypress, TX 77433
Receiving water	LANGHAM CRK;BEAR CRK;SOUTH MAYDE CRK;BUFFALO BAYOU
Subwatershed	Langham Creek (HUC 120401040201)

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

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
8With a violation of any kind
7With 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
BOD, carbonaceous [5 day, 20 C]	3	105	3	February 28, 2026	133% over the limit
Solids, total suspended	3	103	1	November 30, 2021	23% over the limit
Nitrogen, ammonia total [as N]	3	103	1	July 31, 2026	65% over the limit
pH	2	69	1	June 30, 2022
Chlorine, total residual	2	69	1	May 31, 2021	2% over the limit
Oxygen, dissolved [DO]	1	35	1	September 30, 2022	80% over the limit
E. coli	2	25	1	September 30, 2023	61% over the limit
Flow, in conduit or thru treatment plant	2	68	0

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 TX0136484.

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.

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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 TX0136484 there.

Nearby on the register

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

This public-records page covers NPDES permit TX0136484, held by HARRIS COUNTY MUD NO 438 in Cypress, TX, for discharges to Langham Crk, Bear Crk, South Mayde Crk and Buffalo Bayou. The page lists the permit as administratively continued with a Minor discharger class, 8 pollutants under a numeric limit and 7 pollutants with an effluent exceedance.