Alexandria, VA

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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: Since Alexandria lacks a local monitor, we use data from the closest station in Springfield, 7.6 miles away.

📍 Homebuyer Guide 📊 Data Coverage: 100% 📅 2021-2025 Trends

Alexandria, VA air quality summary: Alexandria, VA receives a clean air score of 79.4, which corresponds to a grade of B. Annual PM2.5 levels of 6.8 µg/m³ are moderate, reflecting typical urban background levels. Over the available history, long-term air quality in Alexandria has improved.

Clean Air Score

Grade B

A B grade suggests good air quality, though occasional fluctuations in pollutant levels may occur.

🏡 What This Means for Buying

When considering properties in Alexandria, air quality data should be an important factor in your decision-making process.

Best time for outdoor visits: Check seasonal chart

Indoor Air Quality in Alexandria, VA

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 Alexandria.

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 Alexandria:

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 Alexandria Homes:

Best HEPA Air Purifier for Alexandria Wildfire Smoke PM2.5 Indoor Air Quality Monitor Formaldehyde & VOC Detector

People also search: "indoor air quality in Alexandria, VA"

🩺 My Health Risk Assessment

See how Alexandria'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

+9.6% theoretical value retention

Between 2019 and 2024, Alexandria's air quality improved by 2.4 μg/m³. Based on NBER studies, this change correlates with a estimated 9.6% increase in relative property value retention.

Cleaner Alternatives in VA

* 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.

Annual PM2.5

6.8 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 Alexandria earned a 79.4

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

See full formula

Annual Air Quality

6.8 μg/m³

Component score 74.8 × 40% = 29.9 points

Unhealthy Days

0 days/yr est.

0% of days above AQI 100. Component score 100 × 25% = 25.0 points

5-Year Trend

Improving

Component score 62 × 20% = 12.4 points

Seasonal Variability

94.5

Higher means steadier month-to-month air. Weighted contribution: 9.5 points

Extreme Events

100

Captures severe pollution spikes. Weighted contribution: 5.0 points

Coverage & Monitoring

100%

Proxy monitor: Springfield (7.6 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%	74.8
Unhealthy Days	25%	100
5-Year Trend	20%	62
Seasonal Variability	10%	94.5
Extreme Events	5%	100

Explore More Air Quality Data

View more cities in VA See how Alexandria 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.