EPA Air · stack tests by county and year
Air-emissions stack tests in Monterey County, California, 2026
- 19Stack 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 Monterey County, California 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 Monterey County facility page.
Air-emissions stack tests in Monterey County, other years
What stands out
- Stack tests in Monterey County, California, fell from 49 in 2025, the previous year on file, to 19 in 2026.
- The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
- Its 19 stack tests rank 10th of the 17 county cells in California for 2026.
- Its 19 stack tests are 1% of the 1,849 the state’s file holds for 2026.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Monterey County, California, 2026
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 Monterey county, CA, for 2026. It lists 19 stack tests recorded in 2026.