AIR QUALITY WA

Air Quality in Olympia, WA: Good (34 AQI)

AQI 34 · Good · Ozone · Updated 2026-07-18

Olympia's air quality is good. Air pollution poses little or no risk.

Data: EPA AirNow, FEMA National Risk Index Last verified: 2026-07-18

Average AQI

Good

AQI Category

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. Olympia's average AQI of 34 falls in the "Good" range.

Air Quality Map: Olympia, WA

Each dot represents a ZIP code. Color indicates AQI level. Tap a dot for details.

Good (0-50) Moderate (51-100) USG (101-150) Unhealthy (151+)

Air Quality by ZIP Code in Olympia

AQI varies across Olympia's 11 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
98501	35	Good	18	50	View report →
98504	35	Good	18	54	View report →
98505	35	Good	23	54	View report →
98506	35	Good	23	48	View report →
98507	35	Good	18	43	View report →
98508	35	Good	18	54	View report →
98512	35	Good	17	50	View report →
98513	35	Good	17	48	View report →
98516	35	Good	18	35	View report →
98599	35	Good	18	54	View report →
98502	23	Good	23	50	View report →

Air Quality Overview

Olympia, Washington has good air quality with an average AQI of 34. This means air pollution poses little or no risk. The dominant pollutant measured is Ozone.

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: Ozone

Ground-level ozone forms when pollutants from cars, power plants, and industrial facilities react with sunlight. Unlike stratospheric ozone, ground-level ozone is harmful to breathe.

Health effects of ozone exposure:

Irritation of the respiratory system
Reduced lung function
Aggravation of asthma and chronic lung diseases
Increased susceptibility to respiratory infections

Peak times: Ozone levels are typically highest on hot, sunny afternoons. Exercise outdoors in the morning when levels are lower.

Air Quality by ZIP Code in Olympia

AQI varies across Olympia's 11 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Wildfire Risk	Mold Score
98501	35	Good	18	50
98504	35	Good	18	54
98505	35	Good	23	54
98506	35	Good	23	48
98507	35	Good	18	43
98508	35	Good	18	54
98512	35	Good	17	50
98513	35	Good	17	48
98516	35	Good	18	35
98599	35	Good	18	54
98502	23	Good	23	50

Wildfire Smoke Risk

Olympia has an elevated wildfire smoke risk with an average smoke risk score of 19 (scale 0-100). There have been 109 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	19
Max smoke risk score	23
Fires within 100 km	109
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

Olympia has an average mold risk score of 49 out of 100.

Factor	Value
Mold risk score	49/100
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 good air quality (AQI 34), Olympia residents can enjoy outdoor activities without significant restrictions. General tips:

Monitor AQI during wildfire season for temporary spikes
Use HEPA air purifiers indoors if you have respiratory conditions
Maintain indoor humidity between 30-50% to prevent mold

Olympia vs. Nearby Washington Cities

How Olympia's air quality compares to nearby cities:

City	AQI	Category	Population
Olympia	34	Good	198,909
Everett	37	Good	172,103
Kent	37	Good	168,134
Puyallup	37	Good	159,553

ZIP Codes in Olympia

Olympia covers 11 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 Olympia?

Yes - Olympia's average AQI is 34 (Good). Air pollution poses little or no risk for the general population.

How many unhealthy air days does Olympia have?

Olympia has zero recorded unhealthy air quality days, which is excellent. Air quality can still vary seasonally due to wildfire smoke, pollen, or industrial activity.

What is the AQI in Olympia?

The average Air Quality Index (AQI) in Olympia is 34, categorized as Good. The primary pollutant is Ozone. 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 Olympia?

Olympia has a wildfire risk score of 19 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 Olympia?

Olympia has a mold risk score of 49 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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