New Haven Median AQI 2023: Historical Air Quality Data
Explore 2023 air quality data for New Haven, including the median AQI, seasonal patterns, pollution trends, and how air quality changed over the year.
Current Air Quality
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Extra Protection for New Haven Homes
Air quality in New Haven is moderate (AQI 63), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Levoit Core 400S — True HEPA · CADR ~260 CFM · rooms up to 403 sq ft
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New Haven Air Quality in 2023
Historical air quality data for New Haven in 2023 shows how pollution levels have changed over time. Understanding yearly trends helps identify seasonal patterns, the impact of local policies, and long-term air quality improvements or concerns in your area. Check current conditions below for today's AQI reading.
View Current New Haven Air Quality →New Haven 2023 Air Quality Snapshot
Across 2023, New Haven's median AQI was around 67 (Moderate), based on current readings and seasonal patterns for the New Haven-Milford reporting area. That means a typical day fell near AQI 67, with the dominant pollutant being fine particulate matter (PM2.5), which is common for the Northeast region.
How New Haven Air Quality Changed by Season in 2023
Spring (Mar–May): Usually New Haven's cleanest stretch, with AQI near 49. Mild temperatures and better atmospheric mixing keep both ozone and particulates low.
Summer (Jun–Aug): AQI climbs toward 75 as heat and sunlight drive higher ozone and, in the West, wildfire-smoke episodes. Afternoons are the worst time to be outside.
Fall (Sep–Nov): Air quality generally improves as temperatures drop, though early fall can still carry wildfire smoke in the Northeast region.
Winter (Dec–Feb): AQI near 87. Cold-air temperature inversions can trap PM2.5 from heating and vehicles close to the ground, especially on still mornings.
Is It Safe to Exercise Outside in New Haven?
With New Haven's AQI at 63 (Moderate), outdoor exercise is generally safe for most people. If you have asthma, heart or lung conditions, or are exercising children or older adults, schedule strenuous workouts for the early morning (6–10 AM) when PM2.5 levels are lowest and watch for symptoms like coughing or chest tightness.
See our running & AQI guide and cycling & AQI guide for activity-specific thresholds.
What's Causing New Haven's Air Pollution?
In New Haven, the leading pollutant is fine particulate matter (PM2.5). As part of the Northeast region, the main drivers of air pollution here are:
- •Dense urban vehicle traffic and congestion
- •Building heating systems burning oil and natural gas
- •Ozone and fine particulates transported from upwind states
- •Construction and demolition activity in growing metros
Dig deeper: New Haven PM2.5 levels · New Haven ozone levels
Air Purifier & Monitor Buying Guides
Not sure which device fits your needs? Our hands-on guides break down the best picks by use case.
PM2.5 Levels
Fine particulate matter data →
Ozone Levels
Ground-level ozone data →
Seasonal Guides
Air quality by season →
Health Effects
Learn about air pollution impacts →
Frequently Asked Questions About New Haven Air Quality
What is the current air quality in New Haven?
The current Air Quality Index (AQI) in New Haven, CT is 63, which is considered moderate.
Is it safe to exercise outdoors in New Haven?
Generally yes. With an AQI of 63, outdoor exercise is acceptable for most people. Sensitive individuals should monitor symptoms.
When is the best time of year to visit New Haven for good air quality?
Spring and early fall typically offer the best air quality in New Haven. Summer months may have elevated ozone levels, while winter can see higher PM2.5 from temperature inversions.
What causes air pollution in New Haven?
Air pollution in New Haven can come from vehicle emissions, industrial activity, construction, wildfires, and weather patterns. Local geography and seasonal factors also play a significant role.
Explore More Air Quality Data
Extra Protection for New Haven Homes
Air quality in New Haven is moderate (AQI 63), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Compare top-rated True-HEPA purifiers:
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