Trenton Air Quality in August
Across 2019–2025, Trenton's August air quality had a median AQI of 50 (Good) over 217 monitored days in the Trenton, NJ area. 1.8% of August days (4 of 217) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 52.5% of days. The cleanest August on record here was 2022 (median AQI 48, 0 days above 100) and the worst was 2021 (median 54, 2 days above 100, peak AQI 129).
- Good: 50.7%
- Moderate: 47.5%
- Unhealthy for Sensitive Groups: 1.8%
- Unhealthy or worse: 0.0%
Extra Protection for Trenton Homes
Air quality in Trenton is moderate (AQI 52), 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: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Trenton in August?
Good on a typical day: median AQI 50 across 2019–2025, with 1.8% of August days above AQI 100. Ground-level ozone is the main driver.
- ✓50.7% of August days were Good (AQI 0–50), 47.5% Moderate (51–100).
- ✓4 days of 217 reached AQI 101+; the August peak was 129.
- ✓Best August: 2022; worst August: 2021.
Frequently asked questions
What is the air quality like in Trenton in August?▾
Across 2019–2025, the median daily AQI in Trenton in August was 50 (Good). 50.7% of days were Good, 47.5% Moderate, and 1.8% reached Unhealthy for Sensitive Groups or worse, based on 217 monitored days in EPA's Air Quality System.
Is August a good time for outdoor exercise in Trenton?▾
A typical August day in Trenton sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 56 of August days (1.8%) reached AQI 101+ in 2019–2025.
Which pollutant causes Trenton's August air quality problems?▾
Ground-level ozone set the daily AQI on 52.5% of August days in Trenton. The highest August AQI recorded in 2019–2025 was 129 (Unhealthy for Sensitive Groups), in 2021.
Trenton August air quality, year by year
Trenton August air quality by year (Trenton, NJ, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 31 | 52 | 0 | 80 | O3 |
| 2020 | 31 | 47 | 1 | 101 | O3 |
| 2021worst | 31 | 54 | 2 | 129 | PM2.5 |
| 2022cleanest | 31 | 48 | 0 | 93 | O3 |
| 2023 | 31 | 52 | 0 | 71 | PM2.5 |
| 2024 | 31 | 55 | 0 | 97 | O3 |
| 2025 | 31 | 46 | 1 | 101 | O3 |
What August air means in Trenton
A typical August day in Trenton sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 56 of August days (1.8%) reached AQI 101+ in 2019–2025.
August's median AQI of 50 is above Trenton's whole-year median of 45, making it one of the area's dirtier periods. Nationally, the median August AQI across every EPA metro area (104,152 metro-days, 2019–2025) is 45, so Trenton runs above the national August norm; 1.8% of its August days topped AQI 100 versus 3.5% nationally (below average).
August is part of Trenton's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Trenton
The latest EPA AirNow observation puts Trenton's AQI at 52 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Trenton air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Trenton, NJ), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.