Clean Water Act discharge permit · NPDES TX0075370

WEST LITTLE YORK COARING PLANT, Houston, TX: NPDES TX0075370 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
1Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

WEST LITTLE YORK COARING PLANT, held by NATIONAL OILWELL VARCO, L.P., holds NPDES permit TX0075370, which discharges to San Jacinto River Basin. EPA’s file records it issued August 24, 2007 and expiring May 1, 2012. 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	WEST LITTLE YORK COARING PLANT
Permittee as filed	NATIONAL OILWELL VARCO, L.P.
NPDES ID	TX0075370
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	August 24, 2007
Expiration date	May 1, 2012
Address	Houston, TX 77041
Receiving water	SAN JACINTO RIVER BASIN
Subwatershed	Cole Creek-Whiteoak Bayou (HUC 120401040302)
Other EPA IDs (FRS)	RCRA handler TXD000808006; ICIS-AIR source TX0000004820100322

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

8Pollutants on file
7Under a numeric limit
8With 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
Copper, total [as Cu]	4	17	5	July 31, 2012	414% over the limit
Solids, total suspended	2	66	0
Oil & Grease	2	66	0
Carbon, tot organic [TOC]	2	66	0
Flow, in conduit or thru treatment plant	2	36	0
pH	2	24	0
Zinc, total [as Zn]	2	12	0
Chromium, hexavalent [as Cr]	0	8	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 TX0075370.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0075370.

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 TX0075370.

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, TX0075370.

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How we handle your data → Privacy

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 TX0075370 there.

Nearby on the register

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

This public-records page covers NPDES permit TX0075370 for the WEST LITTLE YORK COARING PLANT in Houston, TX, held by NATIONAL OILWELL VARCO, L.P., which discharges to the San Jacinto River Basin. The permit was issued August 24, 2007, expired May 1, 2012, and is administratively continued, with a Minor Discharger class, 1 pollutant under a numeric limit, and 1 pollutant with an effluent exceedance.