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Kirkwood, MO

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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: Kirkwood does not have its own EPA monitor and relies on the nearest monitor in Arnold, 10.5 miles away.
📍 Homebuyer Guide 📊 Data Coverage: 94.5% 📅 2021-2025 Trends

Kirkwood, MO air quality summary: Kirkwood, MO, has a clean air score of 80.7 and an overall grade of B. The city's average annual PM2.5 level is 6.5 µg/m³. Kirkwood has an annual mean PM2.5 level of 6.5 µg/m³, which is described as moderate or acceptable but still relevant for long-term exposure. Long-term air quality changes in Kirkwood have been limited or modest in recent years.

Clean Air Score

81
Grade B

The clean air score of 80.7 and grade of B indicate a high standard of air quality for long-term residents. These metrics reflect consistently low particulate levels in the area.

🏡 What This Means for Buying

Kirkwood's air quality is a favorable environmental factor for those considering long-term residency. This data should be combined with other local research to inform housing choices.

Best time for outdoor visits: Check seasonal chart

Indoor Air Quality in Kirkwood, MO

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 Kirkwood.

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 Kirkwood:

  • 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 Kirkwood Homes:

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

🩺 My Health Risk Assessment

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

Current Risk Level
Low Risk
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💡

Health Advice

Enjoy the outdoors! Air quality is great.

Est. Annual "Risky Days" for you: ~0 days/year

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🏡 Property Value Impact Analysis

Estimated Impact (5-Year)
Positive Signal
+1.2% theoretical value retention

Between 2019 and 2024, Kirkwood's air quality improved by 0.3 μg/m³. Based on NBER studies, this change correlates with a estimated 1.2% increase in relative property value retention.

Cleaner Alternatives in MO

No cleaner cities found in this state. Kirkwood is already a top performer!

* 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
6.5 μg/m³
WHO Target: <5.0
Good Days
100.0 %
% days AQI < 100
5-Year Trend
Improving
↑ Improving
Long-term direction
Extreme Days
0 days/yr
Days AQI > 150 (Est.)

Why Kirkwood earned a 80.7

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

See full formula
Annual Air Quality
6.5 μg/m³
Component score 78.5 × 40% = 31.4 points
Unhealthy Days
0 days/yr est.
0% of days above AQI 100. Component score 100 × 25% = 25.0 points
5-Year Trend
Mixed
Component score 50 × 20% = 10.0 points
Seasonal Variability
93.6
Higher means steadier month-to-month air. Weighted contribution: 9.4 points
Extreme Events
100
Captures severe pollution spikes. Weighted contribution: 5.0 points
Coverage & Monitoring
94.5%
Proxy monitor: Arnold (10.5 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% 78.5
Unhealthy Days 25% 100
5-Year Trend 20% 50
Seasonal Variability 10% 93.6
Extreme Events 5% 100

Explore More Air Quality Data

View more cities in MO See how Kirkwood 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 MO

Arnold Grade B
Score: 80.7/100
Chesterfield Grade B
Score: 80.7/100
Oakville Grade B
Score: 80.7/100
Wildwood Grade B
Score: 80.7/100
Wentzville Grade B
Score: 80.7/100
Ballwin Grade B
Score: 80.7/100

Similar Rankings Nationwide

#642 Ballwin, MO
Score: 80.7/100
#643 Princeton, NJ
Score: 80.7/100
#644 Mehlville, MO
Score: 80.7/100
#645 Mercerville-Hamilton Square, NJ
Score: 80.7/100
#646 Vincentown, NJ
Score: 80.7/100
#647 Affton, MO
Score: 80.7/100

Kirkwood Air Quality FAQs

Is Kirkwood a good fit for people who care about long-term air quality?

Kirkwood is a strong candidate for those focused on air quality, with a clean air score of 80.7 and a grade of B. The annual PM2.5 mean of 6.5 µg/m³ indicates a healthy long-term environment.

How frequent is unhealthy air in Kirkwood?

Kirkwood records 0% unhealthy air days, which means acute pollution spikes are very rare. This consistency helps maintain the city's grade of B.

Is air quality in Kirkwood improving or getting worse over time?

Air quality trends in Kirkwood are currently stable, with no significant long-term shifts reported.

Does air quality vary across different parts of Kirkwood?

Air quality can vary within Kirkwood due to local traffic, industry, and location patterns, even without a city-specific monitor.