Clean Water Act discharge permit · NPDES TXG110366
KOY CONCRETE KATY PLANT, Katy, TX: NPDES TXG110366 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 20Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
KOY CONCRETE KATY PLANT, held by KOY CONCRETE LTD, holds NPDES permit TXG110366, which discharges to Buffalo Bayou Above Tidal; Mason Creek. EPA’s file records it issued November 18, 2016 and expiring November 7, 2021. 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 | KOY CONCRETE KATY PLANT |
|---|---|
| Permittee as filed | KOY CONCRETE LTD |
| NPDES ID | TXG110366 |
| 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 | November 18, 2016 |
| Expiration date | November 7, 2021 |
| Address | Katy, TX 77493 |
| Receiving water | BUFFALO BAYOU ABOVE TIDAL; MASON CREEK |
| Subwatershed | Barker Reservoir-Buffalo Bayou (HUC 120401040104) |
| 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
- 3With 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 | 2 | 116 | 19 | October 31, 2019 | 522% over the limit |
| Oil & Grease | 2 | 106 | 3 | August 31, 2005 | 113% over the limit |
| pH | 4 | 261 | 2 | August 31, 2002 | |
| Flow, in conduit or thru treatment plant | 2 | 114 | 0 | ||
| Chromium, total [as Cr] | 4 | 21 | 0 | ||
| Nickel, total [as Ni] | 4 | 21 | 0 | ||
| Arsenic, total [as As] | 4 | 20 | 0 | ||
| Barium, total [as Ba] | 4 | 20 | 0 | ||
| Cadmium, total [as Cd] | 4 | 20 | 0 | ||
| Copper, total [as Cu] | 4 | 20 | 0 | ||
| Lead, total [as Pb] | 4 | 20 | 0 | ||
| Manganese, total [as Mn] | 4 | 20 | 0 | ||
| Silver, total [as Ag] | 4 | 20 | 0 | ||
| Zinc, total [as Zn] | 4 | 20 | 0 | ||
| Selenium, total [as Se] | 4 | 20 | 0 | ||
| Mercury, total [as Hg] | 4 | 20 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 4 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 4 | 7 | 0 | ||
| Whole effluent toxicity - retest #1 | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 4 | 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 TXG110366.
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, TXG110366.
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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 TXG110366 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.