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.