# Counties in New Jersey by share of days with good air quality (US EPA AQI), 1983

All 18 values come from U.S. Environmental Protection Agency for 1983, so the places are comparable. 2 counties have no value for that period and are not ranked.

- Indicator id: `aqi_good_days_share`
- Unit: %
- Definition: Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Retrieved: 2026-10-12
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/good-air-quality-days-share/new-jersey-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Passaic County | 100 |
| 2 | Salem County | 98.3 |
| 3 | Somerset County | 77.8 |
| 4 | Monmouth County | 76.7 |
| 5 | Ocean County | 71.8 |
| 6 | Mercer County | 71.2 |
| 7 | Hunterdon County | 67 |
| 8 | Cumberland County | 66.6 |
| 9 | Burlington County | 57.7 |
| 10 | Atlantic County | 56 |
| 11 | Middlesex County | 52.1 |
| 12 | Bergen County | 51.2 |
| 13 | Gloucester County | 48 |
| 14 | Essex County | 44 |
| 15 | Camden County | 40.1 |
| 16 | Morris County | 33.8 |
| 17 | Hudson County | 32.1 |
| 18 | Union County | 27.7 |