Caldwell, New Jersey Air Quality
Caldwell has a median AQI of 44, earning an air quality grade of A- — excellent air quality that ranks better than 35% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2022, Caldwell recorded 177 good air quality days (66% of monitored days).
Population: 9,003 • County: Essex
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Quick Facts
| Current AQI | 44 — Good |
| Air Quality Grade | A- |
| Median AQI (2022) | 44 |
| vs. U.S. Cities | Better than 35% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | → Stable |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2022 Air Quality Summary
Primary Pollutant Days (2022)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Caldwell Air Quality
What is the air quality in Caldwell today?
The current AQI in Caldwell is 44, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Caldwell getting better or worse?
Air quality in Caldwell has remained relatively stable over the past decade, with a median AQI of around 44.
What is the most common air pollutant in Caldwell?
PM2.5 is the primary air pollutant in Caldwell, responsible for the most air quality-impacted days in 2022. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Caldwell have per year?
In 2022, Caldwell had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 177 good days and 92 moderate days out of 269 days monitored.
What air quality grade does Caldwell receive?
Caldwell receives an air quality grade of A-, placing it better than 35% of US cities. This grade is based on a median AQI of 44 for 2022, derived from EPA monitoring data.
Air Quality Grade
Better than 35% of US cities
Nearby Cities
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National Rankings
See how Caldwell compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Caldwell
Based on your area's air quality (median AQI: 44), we recommend these air purifiers to help protect your health indoors.
RabbitAir MinusA2
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Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
Premium all-in-one air purifier and fan with advanced features.
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