# Counties in New Jersey by highest daily Air Quality Index (US EPA), 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_max`
- Unit: index
- Definition: Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: highest daily AQI (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Publisher page: https://invokely.ai/en/publishers/environmental-protection-agency
- Retrieved: 2026-10-12
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/highest-daily-air-quality-index/new-jersey-counties

| Rank | Place | index |
|---:|---|---:|
| 1 | Atlantic County | 285 |
| 2 | Gloucester County | 276 |
| 2 | Union County | 276 |
| 4 | Morris County | 262 |
| 5 | Middlesex County | 256 |
| 6 | Mercer County | 242 |
| 7 | Hunterdon County | 237 |
| 8 | Camden County | 227 |
| 8 | Essex County | 227 |
| 10 | Bergen County | 226 |
| 11 | Burlington County | 225 |
| 12 | Hudson County | 223 |
| 13 | Cumberland County | 221 |
| 14 | Ocean County | 98 |
| 15 | Monmouth County | 80 |
| 16 | Somerset County | 78 |
| 17 | Salem County | 51 |
| 18 | Passaic County | 43 |