EPA Air · stack tests by county and year

Air-emissions stack tests in Monroe County, Mississippi, 2025

47Stack 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 Monroe County, Mississippi during 2025. 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 Monroe County facility page.

Monroe County, Mississippi, 2025

Air-emissions stack tests in Monroe County, other years

Air-emissions stack tests recorded in Monroe County, Mississippi, 2025

Date	Facility	Kind	Agency
2025-09-12	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-12	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-12	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-12	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-11	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-11	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-11	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-11	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-10	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-09-09	WESTLAKE CHEMICALS AND VINYLS LLC	Pass	State
2025-07-30	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-30	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-30	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-07-29	MONROE GAS STORAGE COMPANY LLC, MONROE GAS STORAGE PROJECT	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — high-priority violation on file	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — high-priority violation on file	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — high-priority violation on file	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — high-priority violation on file	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — high-priority violation on file	Pass	State
2025-06-27	WATCO TRANSLOADING LLC, WTPS AMORY BULK TERMINAL — 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.

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