SmogRank / World / United States / New Jersey / September 2025

Most unhealthy days in New Jersey, United States, September 2025

18 cities in New Jersey, United States ranked by their share of unhealthy days over the 30 days. The most unhealthy days: Camden, United States, 0 of 25 measured days. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Camden 0% 0.75%0
Every city in New Jersey, United States ranked for September 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Camdenlow-cost sensors
    0 of 25
  2. 2Palmyra
    0 of 30
  3. 3Elizabeth
    0 of 30
  4. 4Ewing
    0 of 30
  5. 5Linden
    0 of 30
  6. 6Paterson
    0 of 30
  7. 7Jersey City
    0 of 30
  8. 8Pennsauken
    0 of 30
  9. 9Toms River
    0 of 30
  10. 9New Brunswick
    0 of 30
  11. 11Trenton
    0 of 30
  12. 12Fort Lee
    0 of 30
  13. 13Smithville
    0 of 30
  14. 14Paulsboro
    0 of 24
  15. 14South Vineland
    0 of 30
  16. 16Bayonne
    0 of 27
  17. 17Atlantic City
    0 of 28
  18. 18Mendham
    0 of 30

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, September 2025 · All cities in United States, September 2025 · New Jersey now

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SmogRank, most polluted cities in New Jersey, United States, by unhealthy days, PM2.5, September 2025, smogrank.com/us/region/new-jersey/history/2025-09?by=days (accessed 7 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.