EPA Air · stack tests by county and year

Air-emissions stack tests in Jefferson County, Texas, 2026

45Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Jefferson County, Texas during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Jefferson County facility page.

Jefferson County, Texas, 2026

Air-emissions stack tests in Jefferson County, other years

Air-emissions stack tests recorded in Jefferson County, Texas, 2026

Date	Facility	Kind	Agency
2026-08-31	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-31	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-31	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	Pass	State
2026-08-31	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	Pass	State
2026-08-31	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-31	PORT ARTHUR REFINERY — high-priority violation on file	Fail	State
2026-08-30	BAYPORT POLYMERS	Pass	State
2026-08-30	BAYPORT POLYMERS	Pass	State
2026-08-30	BAYPORT POLYMERS	Pass	State
2026-08-27	PORT NECHES OPERATIONS — high-priority violation on file	Fail	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-24	BEAUMONT CHEMICAL PLANT	Pass	State
2026-08-21	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-21	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-21	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-21	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-21	ARKEMA BEAUMONT PLANT	Pass	State
2026-08-21	CHEVRON PHILLIPS CHEMICAL PORT ARTHUR FACILITY — high-priority violation on file	Pass	State
2026-08-20	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-18	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	Pass	State
2026-08-18	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	Pass	State
2026-08-18	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	Pass	State
2026-08-18	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-18	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-08-18	BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file	Pass	State
2026-08-18	BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file	Pass	State
2026-08-14	EXXONMOBIL OIL BEAUMONT CHEMICAL PLANT — high-priority violation on file	Pass	State
2026-08-14	EXXONMOBIL OIL BEAUMONT CHEMICAL PLANT — high-priority violation on file	Pass	State
2026-08-14	BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file	Pass	State
2026-08-03	CHEVRON PHILLIPS CHEMICAL PORT ARTHUR FACILITY — high-priority violation on file	Pass	State
2026-08-03	CHEVRON PHILLIPS CHEMICAL PORT ARTHUR FACILITY — high-priority violation on file	Pass	State
2026-08-03	BASF TOTAL FINA NAFTA REGION OLEFINS COMPLEX — high-priority violation on file	Pass	State
2026-04-06	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-03-10	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-02-28	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-02-28	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-02-28	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-02-28	EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file	N/A	State
2026-02-28	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State
2026-01-22	BEAUMONT GAS TO GASOLINE PLANT — high-priority violation on file	N/A	State
2026-01-20	PORT ARTHUR REFINERY — high-priority violation on file	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Jefferson county, TX, for 2026. It lists 45 stack tests recorded in 2026.