EPA Air · by county
Air-emissions sources in Union County, Pennsylvania
- 38Facilities
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Every stationary source in Union County, Pennsylvania 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 Union County
Each of the 38 operating major, synthetic minor and minor sources in Union County, Pennsylvania has a record page: every source in Union County, A to Z.
By emissions classification in Union 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 Union 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 13
- 2025 inspections 30
- 2024 inspections 31
- 2023 inspections 31
- 2022 inspections 33
- 2021 inspections 25
- 2020 inspections 23
- 2019 inspections 35
- 2018 inspections 35
- 2017 inspections 41
Violations in Union County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
Stack tests in Union County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
Inspections in Union County, year by year · Violations in Union County, year by year · Stack tests in Union County, year by year
Other counties in Pennsylvania
Every county in the state with at least three sources on file.
- Northumberland County 107
- Perry County 22
- Philadelphia County 461
- Pike County 13
- Potter County 35
- Schuylkill County 99
- Snyder County 47
- Somerset County 63
- Sullivan County 12
- Susquehanna County 206
- Tioga County 75
- Undetermined County 91
- Venango County 45
- Warren County 46
- Washington County 223
- Wayne County 27
- Westmoreland County 158
- Wyoming County 47
- York County 199
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 Union county, PA. It lists 38 facilities in Union county and 0 major sources.