Weekly Air Quality Outlook – July 7–10, 2025
Welcome back from the 4th of July holiday! Here’s what to expect this week for air quality across lower Michigan.
Quick Summary
Ozone: Ranging from Good (Green AQI) to Moderate (Yellow AQI)
Fine Particulate Matter (PM2.5): Expected to remain between upper Good and Moderate levels
After the Fireworks
Fireworks over the weekend caused short-term spikes in fine particulate levels, with some areas exceeding 150 µg/m³. Thankfully, by July 5th, conditions had already improved, and daily averages returned to Moderate or better.
Weather & Air Quality Breakdown
Monday (July 7):
Clouds will clear from northwest to southeast
Some wildfire smoke aloft, but no major ground-level impacts expected
Cooler northerly flow will help suppress ozone formation
Tuesday-Thursday:
These are the most likely days to see Moderate ozone levels, especially in southern Michigan
A midweek disturbance could bring brief showers
Friday:
As high pressure moves out, southerly winds return
May lead to a slight uptick in ozone levels — stay tuned for Thursday's update
Extended Forecast
Looking into the weekend, models show rain possible Saturday, which could help keep pollution levels down. Overall, no air quality category is expected to exceed Moderate during this forecast period.
Next Update
We’ll post our next air quality update on Thursday, July 10, 2025. Be sure to check back or follow us on social media for the latest information.