Clean Water Act discharge permit · NPDES TXG110730

SAN MARCOS PLANT, San Marcos, TX: NPDES TXG110730 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
20Pollutants under a numeric limit
2Pollutants with an effluent exceedance

SAN MARCOS PLANT, held by TEX MIX PARTNERS LTD, holds NPDES permit TXG110730. EPA’s file records it issued February 17, 2012 and expiring November 7, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	SAN MARCOS PLANT
Permittee as filed	TEX MIX PARTNERS LTD
NPDES ID	TXG110730
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	February 17, 2012
Expiration date	November 7, 2016
Address	San Marcos, TX 78666
Subwatershed	Middle York Creek (HUC 121002030306)
SIC	3273 – Ready-Mixed Concrete

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

20Pollutants on file
20Under a numeric limit
18With a violation of any kind
2With 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	1	46	10	April 30, 2016	774% over the limit
pH	2	82	8	October 31, 2015
Oil & Grease	1	37	0
Flow, in conduit or thru treatment plant	1	37	0
Chromium, total [as Cr]	2	11	0
Arsenic, total [as As]	2	9	0
Barium, total [as Ba]	2	9	0
Cadmium, total [as Cd]	2	9	0
Copper, total [as Cu]	2	9	0
Lead, total [as Pb]	2	9	0
Manganese, total [as Mn]	2	9	0
Nickel, total [as Ni]	2	9	0
Silver, total [as Ag]	2	9	0
Zinc, total [as Zn]	2	9	0
Selenium, total [as Se]	2	9	0
Mercury, total [as Hg]	2	9	0
LC50 Pass/Fail Static 24Hr Acute D. Pulex	1	8	0
LC50 Pass/Fail Static 24Hr Acute Pimephales promelas	1	8	0
Whole effluent toxicity - retest #1	1	0	0
Whole effluent toxicity - retest #2	1	0	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 TXG110730.

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, TXG110730.

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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 TXG110730 there.

Nearby on the register

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

This public-records page covers NPDES permit TXG110730 for the San Marcos Plant in San Marcos, TX, held by Tex Mix Partners Ltd, with a status of administratively continued and a minor discharger class. The page lists 20 pollutants on file, 20 under a numeric limit, 18 with a violation of any kind, and 2 with an effluent exceedance.