EPA Air · stack tests by county and year

Air-emissions stack tests in Madera County, California, 2018

• 120Stack 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 Madera County, California during 2018. 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 Madera County facility page.

Madera County, California, 2018

• Inspections 45
• High-priority violations 14

Air-emissions stack tests in Madera County, other years

• 2026 20
• 2025 91
• 2024 235
• 2023 233
• 2022 236
• 2021 448
• 2020 195
• 2019 299
• 2017 262

Air-emissions stack tests recorded in Madera County, California, 2018

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