EPA Air · by county
Air-emissions sources in Cass County, Iowa
- 23Facilities
Every stationary source in Cass County, Iowa 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 Cass County
Each of the 21 operating major, synthetic minor and minor sources in Cass County, Iowa has a record page: every source in Cass County, A to Z.
By emissions classification in Cass 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.
Violations in Cass 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 Cass County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2025 stack tests 6
- 2024 stack tests 5
- 2023 stack tests 10
- 2022 stack tests 12
- 2021 stack tests 3
- 2020 stack tests 3
- 2019 stack tests 11
- 2018 stack tests 8
Violations in Cass County, year by year · Stack tests in Cass County, year by year
Other counties in Iowa
Every county in the state with at least three sources on file.
- Audubon County 11
- Benton County 26
- Black Hawk County 144
- Boone County 35
- Bremer County 36
- Buchanan County 23
- Buena Vista County 31
- Butler County 27
- Calhoun County 16
- Carroll County 38
- Cedar County 26
- Cerro Gordo County 64
- Cherokee County 30
- Chickasaw County 33
- Clarke County 17
- Clay County 22
- Clayton County 31
- Clinton County 65
- Crawford County 21
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 Cass county, IA. It lists 23 facilities in Cass county and 1 major source.