Two Harbors, Minnesota Air Quality
Two Harbors has a median AQI of 34, earning an air quality grade of A — excellent air quality that ranks better than 84% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, Two Harbors recorded 155 good air quality days (96% of monitored days) and 3 unhealthy days.
Population: 3,567 • County: Lake
Loading AQI…
Quick Facts
| Current AQI | 13 — Good |
| Air Quality Grade | A |
| Median AQI (2025) | 34 |
| vs. U.S. Cities | Better than 84% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 3 |
| 10-Year Trend | ↓ Worsening |
| Data Source | EPA AirNow |
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 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
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 Two Harbors Air Quality
What is the air quality in Two Harbors today?
The current AQI in Two Harbors is 13, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Two Harbors getting better or worse?
Air quality in Two Harbors has been worsening in recent years. The median AQI rose from 24 in 2016 to 34 in 2025.
What is the most common air pollutant in Two Harbors?
Ozone is the primary air pollutant in Two Harbors, responsible for the most air quality-impacted days in 2025. Ground-level ozone forms when sunlight reacts with vehicle and industrial emissions on warm days.
How many unhealthy air days does Two Harbors have per year?
In 2025, Two Harbors had 3 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 155 good days and 4 moderate days out of 162 days monitored.
What air quality grade does Two Harbors receive?
Two Harbors receives an air quality grade of A, placing it better than 84% of US cities. This grade is based on a median AQI of 34 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 84% of US cities
Nearby Cities
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National Rankings
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Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Two Harbors
Based on your area's air quality (median AQI: 34), we recommend these air purifiers to help protect your health indoors.
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