New Berlin, Wisconsin Air Quality
New Berlin air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
New Berlin, WI · Air quality right now
The air quality index in New Berlin, WI is 29 (Good) right now — safe for outdoor activity.
Is it safe to be outside in New Berlin today?
AQI 29 Yes — air quality is Good
Air is clean — great for outdoor activity.Main pollutant: OzoneObserved 9:00 AM CDT
Pollutants right now
- PM2.57.1 µg/m³fine particles — smoke, exhaust, soot
- PM107.2 µg/m³coarse particles — dust, pollen, ash
- Ozone57 µg/m³Main pollutantsmog — builds on hot, sunny days
- NO₂2.7 µg/m³nitrogen dioxide — traffic, combustion
ExerciseOK to run — no air-quality limits on outdoor exercise.
How to read New Berlin’s air quality
Guides: The AQI Scale, Explained · Air Quality Alerts, Decoded · How to Read a Wildfire Smoke Map · Why Wildfire Smoke Travels 1,000 Miles.
Air quality over time in New Berlin
Across the EPA’s county records from 2020 to 2025, New Berlin’s cleanest year was 2025 (median AQI 41) and its most polluted was 2023 (median AQI 52); the typical (median) day has trended cleaner since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 44 | 0 | PM2.5 | 2 | 143 | 214 |
| 2021 | 51 | 0 | PM2.5 | 4 | 184 | 177 |
| 2022 | 47 | 0 | PM2.5 | 4 | 144 | 215 |
| 2023 | 52 | 3 | PM2.5 | 19 | 167 | 171 |
| 2024 | 43 | 0 | PM2.5 | 1 | 105 | 260 |
| 2025 | 41 | 3 | PM2.5 | 7 | 113 | 242 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- What was the worst year for air quality in New Berlin?
- In the EPA's 2020–2025 county records, 2023 had the most days above AQI 100: 22 days (19 Unhealthy for Sensitive Groups, 3 Unhealthy or worse). It also had the highest median AQI, 52.
- How many unhealthy air days does New Berlin have?
- Across 2020–2025, 2% of the days reported for New Berlin's county had an AQI above 100 (43 of 2178), about 7 days a year. 2025 had 10 days.
- What's the main air pollutant in New Berlin?
- PM2.5: it drove New Berlin's county AQI on the most days in every year of the EPA's 2020–2025 records.