EPA Air · by county
Air-emissions sources in Porter County, Indiana
- 37Facilities
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Every stationary source in Porter County, Indiana 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 Porter County
Each of the 37 operating major, synthetic minor and minor sources in Porter County, Indiana has a record page: every source in Porter County, A to Z.
By emissions classification in Porter 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 Porter 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 16
- 2025 inspections 21
- 2024 inspections 16
- 2023 inspections 24
- 2022 inspections 26
- 2021 inspections 22
- 2020 inspections 18
- 2019 inspections 26
- 2018 inspections 20
- 2017 inspections 24
Violations in Porter 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 5
- 2025 violations 21
- 2024 violations 6
- 2023 violations 8
- 2022 violations 11
- 2021 violations 12
- 2020 violations 14
- 2019 violations 11
- 2018 violations 8
Stack tests in Porter County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 13
- 2025 stack tests 54
- 2024 stack tests 30
- 2023 stack tests 24
- 2022 stack tests 59
- 2021 stack tests 30
- 2020 stack tests 60
- 2019 stack tests 23
- 2018 stack tests 41
- 2017 stack tests 48
Inspections in Porter County, year by year · Violations in Porter County, year by year · Stack tests in Porter County, year by year
Other counties in Indiana
Every county in the state with at least three sources on file.
- Martin County 4
- Miami County 12
- Monroe County 12
- Montgomery County 12
- Morgan County 13
- Newton County 4
- Noble County 16
- Orange County 7
- Perry County 7
- Pike County 10
- Posey County 23
- Pulaski County 10
- Putnam County 9
- Randolph County 9
- Ripley County 6
- Rush County 4
- Scott County 8
- Shelby County 21
- Spencer County 9
Porter County carries 37 of the 1,740 air-emissions sources this register holds in Indiana, which places it 8th of 83 in that cohort.
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 Porter county, IN. It lists 37 facilities in Porter county, including 20 major sources.