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Lafayette, CO

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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: Lafayette does not have its own EPA monitor and relies on the nearest monitor in Boulder, 9.7 miles away.
📍 Homebuyer Guide 📊 Data Coverage: 99.2% 📅 2021-2025 Trends

Lafayette, CO air quality summary: Lafayette, CO, carries an exceptional clean air score of 89.1 and a grade of A. The city's annual average PM2.5 concentration is 4.8 µg/m³. Lafayette has an annual mean PM2.5 level of 4.8 µg/m³, which is considered relatively low long-term particulate exposure. Long-term air quality in Lafayette has been improving over recent years.

Clean Air Score

89
Grade A

A clean air score of 89.1 and grade of A reflect very low levels of long-term particulate pollution. This indicates a high standard of environmental quality for residents living in the area.

🏡 What This Means for Buying

Lafayette's air quality data serves as a strong positive indicator for those prioritizing environmental health in their home search. This should be viewed as one component of the area's overall residential appeal.

Best time for outdoor visits: Check seasonal chart

Indoor Air Quality in Lafayette, CO

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 Lafayette.

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 Lafayette:

  • 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 Lafayette Homes:

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

🩺 My Health Risk Assessment

See how Lafayette'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
+4.0% theoretical value retention

Between 2019 and 2024, Lafayette's air quality improved by 1 μg/m³. Based on NBER studies, this change correlates with a estimated 4% 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
4.8 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 Lafayette earned a 89.1

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

See full formula
Annual Air Quality
4.8 μg/m³
Component score 100 × 40% = 40.0 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 55 × 20% = 11.0 points
Seasonal Variability
91.2
Higher means steadier month-to-month air. Weighted contribution: 9.1 points
Extreme Events
100
Captures severe pollution spikes. Weighted contribution: 5.0 points
Coverage & Monitoring
99.2%
Proxy monitor: Boulder (9.7 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% 100
Unhealthy Days 25% 100
5-Year Trend 20% 55
Seasonal Variability 10% 91.2
Extreme Events 5% 100

Explore More Air Quality Data

View more cities in CO See how Lafayette 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 CO

Pueblo Grade A
Score: 89.4/100
Pueblo West Grade A
Score: 89.4/100
Boulder Grade A
Score: 89.1/100
Louisville Grade A
Score: 89.1/100
Grand Junction Grade A
Score: 88.8/100
Clifton Grade A
Score: 88.8/100

Similar Rankings Nationwide

#86 Lubbock, TX
Score: 89.1/100
#87 Cheyenne, WY
Score: 89.1/100
#88 Aloha, OR
Score: 89.1/100
#89 Forest Grove, OR
Score: 89.1/100
#90 Plainview, TX
Score: 89.1/100
#91 Bethany, OR
Score: 89.1/100

Lafayette Air Quality FAQs

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

Lafayette is an excellent choice for air quality, with a clean air score of 89.1 and a grade of A. Its annual PM2.5 mean of 4.8 µg/m³ reflects a very clean environment.

How frequent is unhealthy air in Lafayette?

In Lafayette, the frequency of unhealthy air days is 0%, indicating very few acute pollution events. This stability is consistent with the city's grade of A.

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

Long-term data shows that air quality in Lafayette has been improving over recent years.

Does air quality vary across different parts of Lafayette?

Air quality can vary within Lafayette due to local traffic, industry, and location patterns, even in the absence of a local monitor.