Sugar Grove, Illinois Air Quality
Sugar Grove has a median AQI of 46, earning an air quality grade of B+ — good air quality that ranks better than 24% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Sugar Grove recorded 166 good air quality days (61% of monitored days) and 9 unhealthy days.
Population: 9,240 • County: Kane
Current AQI
Quick Facts
| Current AQI | 21 — Good |
| Air Quality Grade | B+ |
| Median AQI (2025) | 46 |
| vs. U.S. Cities | Better than 24% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 9 |
| 10-Year Trend | ↓ Worsening |
| Data Source | EPA AQS (historical) · AirNow (live) |
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 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Sugar Grove is sourced from the Aurora monitoring area, located approximately 11 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Sugar Grove typically sees its worst air quality during summer afternoons when heat and sunlight drive ground-level ozone formation from vehicle and industrial emissions. Morning readings are generally 15–25 points lower than afternoon peaks. Outdoor activity is best planned for early morning on high-ozone days.
AQI Trend (10 Years)
Air Quality Days by Year
Sugar Grove Median AQI by Year
Annual EPA air quality data for Sugar Grove — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 46 | 166 | 9 | 165 | PM2.5 |
| 2024 | 42 | 237 | 1 | 105 | Ozone |
| 2023 | 46 | 178 | 21 | 174 | Ozone |
| 2022 | 42 | 189 | 3 | 129 | Ozone |
| 2021 | 44 | 188 | 1 | 112 | Ozone |
| 2020 | 42 | 204 | 7 | 161 | Ozone |
| 2019 | 42 | 210 | 4 | 112 | Ozone |
| 2018 | 39 | 275 | 5 | 122 | Ozone |
| 2017 | 40 | 275 | 1 | 143 | Ozone |
| 2016 | 36 | 286 | 8 | 140 | Ozone |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Sugar Grove Air Quality
What is the air quality in Sugar Grove today?
The current AQI in Sugar Grove is 21, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Sugar Grove getting better or worse?
Air quality in Sugar Grove has been worsening. The median AQI has risen 10 points (from 36 in 2016 to 46 in 2025), a concern for local health officials.
What is the most common air pollutant in Sugar Grove?
PM2.5 is the primary air pollutant in Sugar Grove, responsible for 142 days (52% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Sugar Grove have per year?
In 2025, Sugar Grove recorded 61% good air quality days (166 days) out of 273 monitored days. There were 8 Unhealthy for Sensitive Groups days and 1 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 165.
What air quality grade does Sugar Grove receive?
Sugar Grove receives an air quality grade of B+, placing it better than 24% of US cities. This is based on a median AQI of 46 in 2025, with 166 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 24% of US cities
Nearby Cities
Get AQI Alerts
Receive notifications when air quality changes in Sugar Grove
National Rankings
See how Sugar Grove compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Sugar Grove
PM2.5 is Sugar Grove's primary pollutant. Even at relatively low levels, long-term exposure to fine particulate matter has health effects — True HEPA filtration captures particles down to 0.3 microns.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
- ✓Good room size match
- ✓Recommended for your air quality
- ✓High performance
We may earn a commission from purchases
Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Honeywell HPA300
Powerful workhorse for large rooms. Built to last.
Coway Airmega AP-1512HH
Best overall value for medium rooms. Excellent performance at an affordable price.
Not sure which air purifier is right for you?
Learn more about different types of air purifiers and how to choose the best one for your needs.
Read our complete buying guide →