AIR QUALITY WA

Air Quality in Lynnwood, WA: Moderate (55 AQI)

AQI 55 · Moderate · PM2.5 · Updated 2026-05-03

Lynnwood's air quality is moderate. Unusually sensitive people should consider reducing prolonged outdoor exertion.

Data: EPA AirNow, FEMA National Risk Index Last verified: 2026-05-03

Average AQI

Moderate

AQI Category

Unhealthy Days

Wildfire Risk

Mold Score

ZIP Codes

What is AQI?

The Air Quality Index (AQI) is a standardized scale from 0 to 500 that measures air pollution levels. 0-50 is "Good," 51-100 is "Moderate," 101-150 is "Unhealthy for Sensitive Groups," and above 150 is "Unhealthy" for everyone. AQI tracks five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Lynnwood's average AQI of 55 falls in the "Moderate" range.

Air Quality by ZIP Code in Lynnwood

AQI varies across Lynnwood's 4 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
98036	64	Moderate	16	52	View report →
98037	52	Moderate	16	46	View report →
98046	52	Moderate	16	42	View report →
98087	52	Moderate	16	40	View report →

Air Quality Overview

Lynnwood, Washington has moderate air quality with an average AQI of 55. Air quality is acceptable, though some pollutants may be a concern for a small number of people who are unusually sensitive to air pollution. The dominant pollutant is PM2.5.

The Air Quality Index (AQI) is an EPA-standardized scale from 0 to 500. Values below 50 are "Good," 51-100 "Moderate," 101-150 "Unhealthy for Sensitive Groups," 151-200 "Unhealthy," 201-300 "Very Unhealthy," and above 300 "Hazardous."

Dominant Pollutant: PM2.5

PM2.5 (fine particulate matter) consists of particles smaller than 2.5 micrometers — about 30 times thinner than a human hair. These particles can penetrate deep into the lungs and enter the bloodstream.

Health effects of PM2.5 exposure:

Short-term: coughing, shortness of breath, aggravated asthma
Long-term: reduced lung function, cardiovascular disease, premature death
Most vulnerable: children, elderly, people with heart or lung disease

Common sources in urban areas: vehicle exhaust, construction dust, industrial emissions, wildfire smoke, residential wood burning.

Air Quality by ZIP Code in Lynnwood

AQI varies across Lynnwood's 4 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Wildfire Risk	Mold Score
98036	64	Moderate	16	52
98037	52	Moderate	16	46
98046	52	Moderate	16	42
98087	52	Moderate	16	40

Wildfire Smoke Risk

Lynnwood has an elevated wildfire smoke risk with an average smoke risk score of 16 (scale 0-100). There have been 86 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	16
Max smoke risk score	16
Fires within 100 km	86
High-risk ZIP codes	0

Wildfire smoke contains PM2.5, carbon monoxide, and volatile organic compounds. Even short-term exposure can trigger asthma attacks and respiratory distress.

Indoor Mold Risk

Lynnwood has an average mold risk score of 45 out of 100.

Factor	Value
Mold risk score	45/100
Average humidity	71% RH
High-risk ZIPs	0
Peak season	winter high

Mold risk is influenced by humidity levels, housing age (older homes have more moisture issues), flood history, and water infrastructure quality. Indoor humidity above 60% creates favorable conditions for mold growth.

Signs of mold problems: musty odors, visible growth on walls or ceilings, worsening allergies indoors, condensation on windows. Professional mold testing ($300-$600) can identify hidden issues.

Health Recommendations

With moderate air quality (AQI 55), most people can be active outdoors. Sensitive groups should take precautions:

Sensitive groups (asthma, COPD, heart disease): consider reducing prolonged outdoor exertion
Keep windows closed on high-pollution days
Use a HEPA air purifier in main living areas
Check AirNow.gov before outdoor exercise

Lynnwood vs. Nearby Washington Cities

How Lynnwood's air quality compares to nearby cities:

City	AQI	Category	Population
Lynnwood	55	Moderate	268,204
Everett	49	Good	280,878
Bellevue	54	Moderate	317,330
Medina	54	Moderate	317,330

ZIP Codes in Lynnwood

Lynnwood covers 4 ZIP codes. Air quality can vary by neighborhood based on proximity to highways, industrial areas, and green spaces. Check your specific ZIP code for localized data.

Data Sources

Air quality: EPA AirNow — real-time and historical AQI data
Wildfire risk: FEMA National Risk Index
Mold risk: Derived from EPA, FEMA, Census ACS (humidity, housing age, flood history)
Monthly AQI: EPA Air Quality Statistics

Updated daily.

Frequently Asked Questions

Is the air safe to breathe in Lynnwood?

Lynnwood's average AQI is 55 (Moderate). Air quality is acceptable, but unusually sensitive individuals may experience respiratory symptoms during peak pollution times.

How many unhealthy air days does Lynnwood have?

Lynnwood experiences 1 unhealthy air quality day per year on average. During these days, everyone — not just sensitive groups — should reduce prolonged outdoor exertion.

What is the AQI in Lynnwood?

The average Air Quality Index (AQI) in Lynnwood is 55, categorized as Moderate. The primary pollutant is PM2.5. AQI ranges from 0-500, where 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and 151+ Unhealthy.

What is the wildfire risk in Lynnwood?

Lynnwood has a wildfire risk score of 16 out of 100. Low wildfire risk means smoke events are uncommon, but regional fires can still temporarily affect air quality.

Is mold a concern in Lynnwood?

Lynnwood has a mold risk score of 45 out of 100, based on humidity, precipitation, and temperature data. Maintain good ventilation and address any water intrusion promptly to prevent mold growth.

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