Clean Water Act discharge permit · NPDES TX0146391
DOW CHEMICAL LA PORTE SITE, La Porte, TX: NPDES TX0146391 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
DOW CHEMICAL LA PORTE SITE, held by THE DOW CHEMICAL COMPANY, holds NPDES permit TX0146391, which discharges to San Jacinto Bay. EPA’s file records it issued August 19, 2025 and expiring August 19, 2030. 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.
What the register holds for DOW CHEMICAL LA PORTE SITE: its NPDES ID, its permit type and status, its dates, its address in La Porte, Texas, its receiving water, and 6 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TX0146391.
Identity
| Facility as filed | DOW CHEMICAL LA PORTE SITE |
|---|---|
| Permittee as filed | THE DOW CHEMICAL COMPANY |
| NPDES ID | TX0146391 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 19, 2025 |
| Expiration date | August 19, 2030 |
| Address | La Porte, TX 77571 |
| Receiving water | San Jacinto Bay |
| Subwatershed | Goose Creek-Frontal Galveston Bay (HUC 120401040706) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 6Under a numeric limit
- 0With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| pH | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| Chlorobenzene | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Trichloroethene | 2 | 0 | 0 | ||
| Aniline | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES TX0146391.
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 TX0146391.
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, TX0146391.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 TX0146391 there.
Nearby on the register
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- Every permit record in Texas, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.