EPA Air · by county
Air-emissions sources in Benton County, Washington
- 9Facilities
Every stationary source in Benton 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 Benton County
Each of the 9 operating major, synthetic minor and minor sources in Benton County, Washington has a record page: every source in Benton County, A to Z.
By emissions classification in Benton 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 Benton 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 23
- 2025 inspections 20
- 2024 inspections 32
- 2023 inspections 74
- 2022 inspections 44
- 2021 inspections 47
- 2020 inspections 59
- 2019 inspections 43
- 2018 inspections 57
- 2017 inspections 61
Stack tests in Benton County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
Inspections in Benton County, year by year · Stack tests in Benton County, year by year
Other counties in Washington
Every county in the state with at least three sources on file.
- Clallam County 8
- Clark County 25
- 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
- Pierce County 75
- Skagit County 16
- Snohomish County 65
- Spokane County 25
- Stevens County 5
- Thurston County 5
- Undetermined County 29
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| BUILDERS FIRST SOURCE | Synthetic minor source | No |
| FRAMATOME NP | Synthetic minor source | No |
| LAMB WESTON | Synthetic minor source | No |
| MAVERIK STORE #448 | Minor source | No |
| NORTHWEST PIPELINE CORP PLYMOUTH PLANT | Major source | No |
| NUTRIEN | Major source | No |
| TREE TOP, INC. | Synthetic minor source | No |
| US ENERGY DEPT - HANFORD | Major source | Yes |
| WASHINGTON STATE DEPT OF HEALTH | Minor source | No |
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 Benton county, WA. It lists 9 facilities in Benton county and 3 major sources.