EPA Air · stack tests by county and year

Air-emissions stack tests in Phelps County, Missouri, 2026

• 14Stack 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 Phelps County, Missouri 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 Phelps County facility page.

Phelps County, Missouri, 2026

• Inspections 3

Air-emissions stack tests in Phelps County, other years

• 2024 5

Air-emissions stack tests recorded in Phelps County, Missouri, 2026

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