Clean Water Act discharge permit · NPDES TX0062642

VARCO W LITTLE YORK FACILITY, Houston, TX: NPDES TX0062642 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
18Pollutants under a numeric limit
9Pollutants with an effluent exceedance
0Inspections on file
1Formal enforcement actions

VARCO W LITTLE YORK FACILITY, held by NATIONAL OILWELL VARCO, LP, holds NPDES permit TX0062642, which discharges to Hcfcd;Turkey Creek;S. Mayde Creek. EPA’s file records it issued April 17, 2017 and expiring March 1, 2022.

VARCO W LITTLE YORK FACILITY, Houston, Texas: Individual permit TX0062642, held by NATIONAL OILWELL VARCO, LP; Administratively continued (past its expiration date and still in force until reissued); issued April 17, 2017, term to March 1, 2022; discharges to HCFCD;TURKEY CREEK;S. MAYDE CREEK.

Zinc, total [as Zn]: 4 limits, 129 violations of any kind, 116 effluent exceedances, latest April 30, 2017, largest 308% over the limit.
Nitrogen, ammonia total [as N]: 4 limits, 34 violations of any kind, 28 effluent exceedances, latest January 31, 2023, largest 452% over the limit.
Copper, total [as Cu]: 8 limits, 30 violations of any kind, 18 effluent exceedances, latest April 30, 2026, largest 110% over the limit.
Oil & Grease: 4 limits, 22 violations of any kind, 8 effluent exceedances, latest December 31, 2024, largest 430% over the limit.
BOD, carbonaceous [5 day, 20 C]: 2 limits, 24 violations of any kind, 6 effluent exceedances, latest February 28, 2014, largest 232% over the limit.
Cyanide, free [amenable to chlorination]: 4 limits, 22 violations of any kind, 2 effluent exceedances, latest June 30, 2015, largest 86% over the limit.
pH: 2 limits, 3 violations of any kind, 1 effluent exceedance, latest April 30, 2015.
Chlorine, total residual: 2 limits, 3 violations of any kind, 1 effluent exceedance, latest October 31, 2012, largest 30% over the limit.
Oxygen, dissolved [DO]: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest September 30, 2012, largest 8% over the limit.
Cadmium, total [as Cd]: 8 limits, 20 violations of any kind, 0 effluent exceedances.
Chromium, total [as Cr]: 4 limits, 20 violations of any kind, 0 effluent exceedances.
Lead, total [as Pb]: 4 limits, 20 violations of any kind, 0 effluent exceedances.
Silver, total [as Ag]: 4 limits, 20 violations of any kind, 0 effluent exceedances.
Nickel, total [as Ni]: 4 limits, 12 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 2 limits, 6 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 2 limits, 6 violations of any kind, 0 effluent exceedances.
E. coli: 2 limits, 4 violations of any kind, 0 effluent exceedances.
Total toxic organics [TTO] [40 CFR433]: 2 limits, 4 violations of any kind, 0 effluent exceedances.

October 9, 2026: Phone Call/ EMAIL (State).
August 31, 2026: State CWA Penalty AO (State), $20,000 state or local penalty.

VARCO W LITTLE YORK FACILITY among its neighbors

EPA’s permit file holds 114 discharge permits in the Langham Creek subwatershed (HUC 120401040201), TX0062642 among them. Its county holds 4,455, 195 of them major permits; TX0062642 is a minor permit.

Other permits in the Langham Creek subwatershed (HUC 120401040201)

1VISION TELGE FACILITY, Houston: TXRNECB50, minor permit, permit term to August 13, 2026
25-003 - CYLIFE PHASE 1, Cypress: TXR1539VI, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
ADDICKS FAIRBANKS LANDFILL, Houston: TXRNEBJ75, minor permit, permit term to August 13, 2026
APARTMENT AT MARVIDA, Cypress: TXR1532TZ, minor permit, discharging to CYPRESS CREEK, permit term to March 4, 2028
ARTIFICIAL TURF FIELD, Cypress: TXR1586OW, minor permit, discharging to DINNER CREEK, permit term to March 4, 2028
ATCO DEVELOPMENT WWTP, Houston Country Club: TX0136301, not classed
ATCO INDUSTRIAL PARK WWTP, Houston: TX0133221, not classed
AVALON AT CYPRESS, Cypress: TXR1506OO, minor permit, discharging to DINNER CREEK, permit term to March 4, 2028
AVALON AT CYPRESS WEST SECTION 1, Cypress: TXR1567NH, minor permit, discharging to LANGHAM CREEK, permit term to March 4, 2028
BARKER RESERVOIR, Houston: TXR1505XW, minor permit, discharging to BUFFALO BAYOU, permit term to March 4, 2028

Identity

Facility as filed	VARCO W LITTLE YORK FACILITY
Permittee as filed	NATIONAL OILWELL VARCO, LP
NPDES ID	TX0062642
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	April 17, 2017
Expiration date	March 1, 2022
Address	Houston, TX 77041
Receiving water	HCFCD;TURKEY CREEK;S. MAYDE CREEK
Subwatershed	Langham Creek (HUC 120401040201)
SIC	3533 – Oil And Gas Field Machinery
Other EPA IDs (FRS)	RCRA handler TXT490014180; ICIS-AIR source TX0000004820100382

Effluent limits and exceedances

18Pollutants on file
18Under a numeric limit
18With a violation of any kind
9With 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
Zinc, total [as Zn]	4	129	116	April 30, 2017	308% over the limit
Nitrogen, ammonia total [as N]	4	34	28	January 31, 2023	452% over the limit
Copper, total [as Cu]	8	30	18	April 30, 2026	110% over the limit
Oil & Grease	4	22	8	December 31, 2024	430% over the limit
BOD, carbonaceous [5 day, 20 C]	2	24	6	February 28, 2014	232% over the limit
Cyanide, free [amenable to chlorination]	4	22	2	June 30, 2015	86% over the limit
pH	2	3	1	April 30, 2015
Chlorine, total residual	2	3	1	October 31, 2012	30% over the limit
Oxygen, dissolved [DO]	2	2	1	September 30, 2012	8% over the limit
Cadmium, total [as Cd]	8	20	0
Chromium, total [as Cr]	4	20	0
Lead, total [as Pb]	4	20	0
Silver, total [as Ag]	4	20	0
Nickel, total [as Ni]	4	12	0
Solids, total suspended	2	6	0
Flow, in conduit or thru treatment plant	2	6	0
E. coli	2	4	0
Total toxic organics [TTO] [40 CFR433]	2	4	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0062642.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0062642.

Formal enforcement and penalties

1 formal actions, 1 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.

Date	What EPA recorded	Agency	Federal penalty	State or local penalty
August 31, 2026	State CWA Penalty AO	State		$20,000

Informal enforcement

Date	What EPA recorded	Agency
October 9, 2026	Phone Call/ EMAIL	State

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Nearby on the register

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

This public-records page covers NPDES permit TX0062642 for the VARCO W LITTLE YORK FACILITY in Houston, TX, held by NATIONAL OILWELL VARCO, LP, with its status as administratively continued and its discharger class listed as Minor. The register lists 18 pollutants under a numeric limit and 9 pollutants with an effluent exceedance for this permit.