IDEM utilizes air quality data to provide the following ozone reports and summaries:
8-Hour Ozone Status
- 8-Hour Ozone Status 2025 [PDF]
- 8-Hour Ozone Status 2024 [PDF]
- 8-Hour Ozone Status 2023 [PDF]
- 8-Hour Ozone Status 2022 [PDF]
- 8-Hour Ozone Status 2021 [PDF]
- 8-Hour Ozone Status 2020 [PDF]
- Archive:
8-Hour Ozone Air Quality Action and Exceedance Days Summary
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2025 [PDF]
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2024 [PDF]
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2023 [PDF]
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2022 [PDF]
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2021 [PDF]
- 8-Hour Ozone Air Quality Action and Exceedance Days Summary 2020 [PDF]
- Archive:
8-Hour Ozone Critical Values
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