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Saint Paul, MN

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Looking for air quality outside the US? We currently only cover US cities. For international data, please check your local environmental agency website.

Long-term air quality

What this page tells you

This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.

Jump to indoor air guidance Read the formula
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Note: No, data for Saint Paul is estimated using the nearest monitor in Minneapolis, located approximately 8.7 miles away.
📍 Homebuyer Guide 📊 Data Coverage: 100% 📅 2021-2025 Trends

Saint Paul, MN air quality summary: With a clean air score of 72.6, Saint Paul, MN is assigned a B grade for its overall air performance. The 7.6 µg/m³ annual mean suggests Saint Paul experiences some particulate buildup. Air quality levels in Saint Paul have been consistent with historical averages recently.

Clean Air Score

73
Grade B

This grade indicates that while air quality is generally high, it falls just short of the top tier.

🏡 What This Means for Buying

For those sensitive to air pollution, Saint Paul's air quality profile is a critical data point.

Best time for outdoor visits: Check seasonal chart

Indoor Air Quality in Saint Paul, MN

Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.

How to react when today's AQI changes

Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in Saint Paul.

AQI 0-50

Good

Open windows: Open windows if you want fresh air.

Air purifier: No purifier needed for most homes.

Indoor activity: Normal indoor activity is fine.

AQI 51-100

Moderate

Open windows: Sensitive groups should limit open-window time.

Air purifier: Use fans or filtration if dust or pollen is bothering you.

Indoor activity: Most people can stay active indoors.

AQI 101-150

Unhealthy for Sensitive Groups

Open windows: Keep windows closed.

Air purifier: Run a HEPA purifier in the main room and bedroom.

Indoor activity: Sensitive groups should reduce outdoor exposure.

AQI 151+

Unhealthy

Open windows: Keep windows and doors closed.

Air purifier: Run HEPA continuously and seal obvious drafts.

Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.

Common indoor air concerns in Saint Paul:

  • Seasonal pollen and dust mite allergens
  • VOCs from household products

Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.

Top Products for Saint Paul Homes:

Best HEPA Air Purifier for Saint Paul Wildfire Smoke PM2.5 Indoor Air Quality Monitor Formaldehyde & VOC Detector
People also search: "indoor air quality in Saint Paul, MN"

🩺 My Health Risk Assessment

See how Saint Paul's air quality affects you and your family specifically.

Current Risk Level
Moderate Risk
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Health Advice

Good for most outdoor activities.

Est. Annual "Risky Days" for you: ~1 days/year

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🏡 Property Value Impact Analysis

Estimated Impact (5-Year)
Positive Signal
+1.6% theoretical value retention

Between 2019 and 2024, Saint Paul's air quality improved by 0.4 μg/m³. Based on NBER studies, this change correlates with a estimated 1.6% increase in relative property value retention.

* Methodology: Comparison based on National Bureau of Economic Research (NBER) Working Paper 15655 correlation between PM2.5 reduction and housing prices. This is a theoretical estimate for informational purposes only.
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Annual PM2.5
7.6 μg/m³
WHO Target: <5.0
Good Days
99.7 %
% days AQI < 100
5-Year Trend
Improving
↑ Improving
Long-term direction
Extreme Days
0 days/yr
Days AQI > 150 (Est.)

Why Saint Paul earned a 72.6

Raw inputs, scoring weights, and data coverage for this city.

See full formula
Annual Air Quality
7.6 μg/m³
Component score 62.6 × 40% = 25.0 points
Unhealthy Days
1 days/yr est.
0.3% of days above AQI 100. Component score 94.5 × 25% = 23.6 points
5-Year Trend
Mixed
Component score 50 × 20% = 10.0 points
Seasonal Variability
89.5
Higher means steadier month-to-month air. Weighted contribution: 9.0 points
Extreme Events
100
Captures severe pollution spikes. Weighted contribution: 5.0 points
Coverage & Monitoring
100%
Proxy monitor: Minneapolis (8.7 miles away)
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Best Time to Run

Find the cleanest hours for your run today.
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Cycling Forecast

Avoid pollution spikes on your next ride.

📅 Past 30 Days Trend

Real-time daily PM2.5 AQI

Live Data

Score Breakdown

Component Weight Score Contribution
Annual Air Quality 40% 62.6
Unhealthy Days 25% 94.5
5-Year Trend 20% 50
Seasonal Variability 10% 89.5
Extreme Events 5% 100

Explore More Air Quality Data

View more cities in MN See how Saint Paul compares nationally

Frequently Asked Questions

How often is this air quality data updated? Our historical trend models and annual rankings are updated regularly based on official EPA data to ensure reports reflect the latest available long-term trends.
What sources does CleanAirData use? We rely strictly on official U.S. Environmental Protection Agency (EPA) monitoring station data for all historical air quality scoring and reports.
Data sourced from U.S. Environmental Protection Agency (EPA) — See our methodology

About This Data

Data Sources

Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.

Methodology

Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:

  • Annual PM2.5 averages (40%)
  • Frequency of unhealthy days (25%)
  • 5-year pollution trends (20%)
  • Seasonal variability and extreme events (15%)

Updates & Accuracy

Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.

Practical Advice

When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.

Data provided for informational purposes only. Always consult local health officials during extreme smoke or pollution events.

More Cities in MN

Duluth Grade B
Score: 81.3/100
Lakeville Grade B
Score: 78.5/100
Faribault Grade B
Score: 78.5/100
Farmington Grade B
Score: 78.5/100
Northfield Grade B
Score: 78.5/100
Red Wing Grade B
Score: 78.5/100

Similar Rankings Nationwide

#1819 Minneapolis, MN
Score: 72.6/100
#1820 Winston-Salem, NC
Score: 72.6/100
#1821 Bellevue, NE
Score: 72.6/100
#1822 Lincoln, NE
Score: 72.6/100
#1823 Plymouth, MN
Score: 72.6/100
#1824 Maple Grove, MN
Score: 72.6/100

Saint Paul Air Quality FAQs

How is Saint Paul's air quality rated?

Saint Paul is currently graded as B with a clean air score of 72.6.

Which pollutants are most concerning in Saint Paul?

The main metric for Saint Paul is PM2.5, with an annual mean concentration of 7.6 µg/m³.

Is the air quality in Saint Paul getting better?

The air quality trend in Saint Paul has been stable without significant change.

Where does the air quality data for Saint Paul come from?

No, data for Saint Paul is estimated using the nearest monitor in Minneapolis, located approximately 8.7 miles away.