New Munster, Wisconsin Air Quality
New Munster has a median AQI of 40, earning an air quality grade of A — excellent air quality that ranks better than 60% of US cities. Air quality has remained relatively stable over the past decade. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, New Munster recorded 142 good air quality days (78% of monitored days) and 5 unhealthy days.
Population: 234 • County: Kenosha
Current AQI
Quick Facts
| Current AQI | 15 — Good |
| Air Quality Grade | A |
| Median AQI (2025) | 40 |
| vs. U.S. Cities | Better than 60% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 5 |
| 10-Year Trend | → Stable |
| 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 New Munster is sourced from the Chiwaukee monitoring area, located approximately 22 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
New Munster has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
New Munster Median AQI by Year
Annual EPA air quality data for New Munster — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 40 | 142 | 5 | 128 | Ozone |
| 2024 | 41 | 267 | 11 | 143 | Ozone |
| 2023 | 48 | 201 | 25 | 206 | PM2.5 |
| 2022 | 44 | 236 | 5 | 164 | Ozone |
| 2021 | 47 | 197 | 11 | 136 | PM2.5 |
| 2020 | 43 | 238 | 11 | 197 | Ozone |
| 2019 | 44 | 248 | 2 | 119 | Ozone |
| 2018 | 44 | 230 | 14 | 166 | Ozone |
| 2017 | 43 | 247 | 10 | 147 | Ozone |
| 2016 | 43 | 253 | 15 | 161 | 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 New Munster Air Quality
What is the air quality in New Munster today?
The current AQI in New Munster is 15, 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 New Munster getting better or worse?
Air quality in New Munster has been stable. The median AQI has dropped 3 points (from 43 in 2016 to 40 in 2025).
What is the most common air pollutant in New Munster?
Ozone is the primary air pollutant in New Munster, responsible for 103 days (57% of monitored days) in 2025. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does New Munster have per year?
In 2025, New Munster recorded 78% good air quality days (142 days) out of 181 monitored days. There were 5 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 128.
What air quality grade does New Munster receive?
New Munster receives an air quality grade of A, placing it better than 60% of US cities. This is based on a median AQI of 40 in 2025, with 142 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 60% of US cities
Nearby Cities
Get AQI Alerts
Receive notifications when air quality changes in New Munster
National Rankings
See how New Munster compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for New Munster
Ozone is New Munster's primary pollutant. Standard HEPA filters don't capture ozone molecules — you need activated carbon or PECO technology to chemically break them down. We highlight those units here.
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.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
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 →