{
  "v": 1,
  "metric": "days-over-100",
  "years": [
    2016,
    2017,
    2018,
    2019,
    2020,
    2021,
    2022,
    2023,
    2024,
    2025
  ],
  "defaultYear": 2025,
  "released": "2026-06-25",
  "source": "U.S. EPA AirData, annual AQI by county",
  "sourceUrl": "https://aqs.epa.gov/aqsweb/airdata/download_files.html"
}