Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES TXRNEBY53

SEMASYS, Houston, TX: NPDES TXRNEBY53 discharge permit, effluent exceedances, inspections, penalties

SEMASYS, held by SemaSys, Inc., holds NPDES permit TXRNEBY53. EPA’s file records it issued August 12, 2022 and expiring August 13, 2026.

SEMASYS, Houston, Texas: Coverage under a general permit TXRNEBY53, held by SemaSys, Inc.; Industrial stormwater; Administratively continued (past its expiration date and still in force until reissued); issued August 12, 2022, term to August 13, 2026.

Texas holds 8,480 Industrial stormwater coverages of this permit type in EPA’s file; 3,526 were issued before TXRNEBY53.

Coverages issued nearest TXRNEBY53

SEMASYS among its neighbors

EPA’s permit file holds 309 discharge permits in the Cole Creek-Whiteoak Bayou subwatershed (HUC 120401040302), TXRNEBY53 among them.

Other permits in the Cole Creek-Whiteoak Bayou subwatershed (HUC 120401040302)

What the register holds for SEMASYS: its NPDES ID, its permit type and status, its dates, its address in Houston, Texas. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES TXRNEBY53.

Identity

Facility as filedSEMASYS
Permittee as filedSemaSys, Inc.
NPDES IDTXRNEBY53
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramIndustrial stormwater
IssuedAugust 12, 2022
Expiration dateAugust 13, 2026
AddressHouston, TX 77041
SubwatershedCole Creek-Whiteoak Bayou (HUC 120401040302)
SIC3082 – Unsupported Plastics Profile Shapes

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES TXRNEBY53.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXRNEBY53.

Inspections

EPA’s inspection file holds no inspection for NPDES TXRNEBY53.

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 TXRNEBY53.

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, TXRNEBY53.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

Nearby on the register

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

What this page shows

SEMASYS is one of 428 storm water industrial permits on EPA's NPDES register in Houston, this one included. Of all 428 storm water industrial permits in Houston, the percent with an earlier issue date than this permit is 61.4%. The facility has 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.