EPA Air · by county
Air-emissions sources in Pierce County, Washington
- 75Facilities
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Every stationary source in Pierce County, Washington that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
Every source’s record in Pierce County
Each of the 75 operating major, synthetic minor and minor sources in Pierce County, Washington has a record page: every source in Pierce County, A to Z.
By emissions classification in Pierce County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in Pierce County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 inspections 123
- 2025 inspections 318
- 2024 inspections 312
- 2023 inspections 271
- 2022 inspections 212
- 2021 inspections 209
- 2020 inspections 320
- 2019 inspections 235
- 2018 inspections 192
- 2017 inspections 203
Stack tests in Pierce County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2025 stack tests 15
- 2024 stack tests 16
- 2023 stack tests 13
- 2022 stack tests 22
- 2021 stack tests 31
- 2020 stack tests 46
- 2019 stack tests 37
- 2018 stack tests 37
- 2017 stack tests 31
Inspections in Pierce County, year by year · Stack tests in Pierce County, year by year
Other counties in Washington
Every county in the state with at least three sources on file.
- Cowlitz County 17
- Franklin County 6
- Grant County 12
- Grays Harbor County 19
- King County 119
- Kitsap County 37
- Klickitat County 5
- Lewis County 15
- Mason County 5
- Okanogan County 19
- Skagit County 16
- Snohomish County 65
- Spokane County 25
- Stevens County 5
- Thurston County 5
- Undetermined County 29
- Walla Walla County 5
- Whatcom County 21
- Yakima County 79
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Pierce county, WA. It lists 75 facilities in Pierce county and 11 major sources.