EPA Air · by county
Air-emissions sources in Delaware County, Pennsylvania
- 253Facilities
Every stationary source in Delaware 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 Delaware County
Each of the 253 operating major, synthetic minor and minor sources in Delaware County, Pennsylvania has a record page: every source in Delaware County, A to Z.
By emissions classification in Delaware 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 Delaware 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 220
- 2025 inspections 314
- 2024 inspections 255
- 2023 inspections 277
- 2022 inspections 295
- 2021 inspections 240
- 2020 inspections 227
- 2019 inspections 270
- 2018 inspections 280
- 2017 inspections 268
Violations in Delaware 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.
- 2026 violations 16
- 2025 violations 26
- 2024 violations 20
- 2023 violations 26
- 2022 violations 18
- 2021 violations 27
- 2020 violations 40
- 2019 violations 28
- 2018 violations 27
- 2017 violations 33
Stack tests in Delaware County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 5
- 2025 stack tests 14
- 2024 stack tests 16
- 2023 stack tests 10
- 2022 stack tests 10
- 2021 stack tests 12
- 2020 stack tests 9
- 2019 stack tests 17
- 2018 stack tests 13
- 2017 stack tests 23
Inspections in Delaware County, year by year · Violations in Delaware County, year by year · Stack tests in Delaware County, year by year
Other counties in Pennsylvania
Every county in the state with at least three sources on file.
- Carbon County 30
- Centre County 84
- Chester County 235
- Clarion County 41
- Clearfield County 99
- Clinton County 46
- Columbia County 56
- Crawford County 61
- Cumberland County 145
- Dauphin County 155
- Elk County 61
- Erie County 137
- Fayette County 73
- Forest County 21
- Franklin County 94
- Fulton County 12
- Greene County 131
- Huntingdon County 21
- Indiana County 103
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 Delaware county, PA. It lists 253 facilities in Delaware county, of which 20 are major sources.