Los Angeles, CA

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Live conditions

Is the air safe in Los Angeles today?

Start with the live AQI and forecast modules for Los Angeles, then use the indoor action guidance below to decide whether to open windows, run a HEPA purifier, or stay inside during smoke and traffic-driven pollution.

Today-focused guide

Check AQI before opening windows

Use the live modules below for same-day conditions

Start with the live AQI and forecast for Los Angeles, then use the indoor action guidance below to decide whether to open windows, run a HEPA purifier, or stay inside during smoke and traffic-driven pollution.

Jump to live AQI tools Read the formula

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

Los Angeles, CA air quality summary: Los Angeles, CA has a Clean Air Score of 39.6 and a grade of F, signaling persistent long-term air quality pressure. Los Angeles records an annual mean PM2.5 concentration of 13 µg/m³, a level that sits above stricter clean-air targets. The long-term trend in Los Angeles is currently worsening, with recent historical data pointing to higher particulate exposure over time.

Clean Air Score

Grade F

An F grade indicates that fine particulate pollution remains a recurring issue in the city's long-term record.

🏡 What This Means for Buying

For people considering Los Angeles, this F grade should be treated as an important environmental factor when evaluating where and how to live in the region.

Best time for outdoor visits: Check seasonal chart

Indoor Air Quality in Los Angeles, CA

Los Angeles air can change quickly, so the indoor guidance below is useful for wildfire smoke, traffic pollution, and everyday protection.

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 Los Angeles.

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 Los Angeles:

Wildfire smoke infiltration (PM2.5)
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 Los Angeles Homes:

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

People also search: "indoor air quality in Los Angeles, CA"

🩺 My Health Risk Assessment

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

Current Risk Level

High Risk

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Health Advice

Reduce prolonged outdoor exertion.

Est. Annual "Risky Days" for you: ~6 days/year

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🏡 Property Value Impact Analysis

Estimated Impact (5-Year)

Concern Signal

-9.2% theoretical value retention

Between 2019 and 2024, Los Angeles's air quality worsened by 2.3 μg/m³. Based on NBER studies, this change correlates with a estimated 9.2% decrease in relative property value retention.

Cleaner Alternatives in CA

* 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.

🏆 Best Neighborhoods in Los Angeles

We analyzed air quality across multiple zip codes to find the healthiest spots to live. See which neighborhoods ranked #1.

View Rankings →

Annual PM2.5

13 μg/m³

WHO Target: <5.0

Good Days

98.4 %

% days AQI < 100

5-Year Trend

Worsening

↓ Worsening

Long-term direction

Extreme Days

1 days/yr

Days AQI > 150 (Est.)

Why Los Angeles earned a 39.6

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

See full formula

Annual Air Quality

13 μg/m³

Component score 0 × 40% = 0.0 points

Unhealthy Days

6 days/yr est.

1.6% of days above AQI 100. Component score 67.2 × 25% = 16.8 points

5-Year Trend

Worsening

Component score 38.5 × 20% = 7.7 points

Seasonal Variability

80.8

Higher means steadier month-to-month air. Weighted contribution: 8.1 points

Extreme Events

Captures severe pollution spikes. Weighted contribution: 4.8 points

Coverage & Monitoring

100%

Direct EPA city monitor

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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%	0
Unhealthy Days	25%	67.2
5-Year Trend	20%	38.5
Seasonal Variability	10%	80.8
Extreme Events	5%	95

Deep Dive: Los Angeles & Related Data

Local ZIP Codes

Nearby Regions

National Rankings

Understanding the Data

Read our Scoring Methodology

Explore More Air Quality Data

View more cities in CA See how Los Angeles 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.