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

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. Phoenix's average AQI of 107 falls in the "USG" range.

How do wildfires affect air quality?

Wildfire smoke contains fine particulate matter (PM2.5) that can travel hundreds of miles and dramatically spike AQI readings. During fire season, even cities far from active fires can experience unhealthy air. HEPA air purifiers (rated for PM2.5) are the most effective indoor protection. Check AirNow.gov for real-time conditions during fire season.

Air Quality Map: Phoenix, AZ

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 Phoenix

AQI varies across Phoenix's 78 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
85001	107	USG	59	18	View report →
85002	107	USG	59	14	View report →
85003	107	USG	59	38	View report →
85004	107	USG	59	17	View report →
85005	107	USG	59	18	View report →
85006	107	USG	59	38	View report →
85007	107	USG	59	41	View report →
85008	107	USG	59	40	View report →
85009	107	USG	59	41	View report →
85010	107	USG	59	14	View report →
85011	107	USG	59	14	View report →
85012	107	USG	54	37	View report →
85013	107	USG	54	47	View report →
85014	107	USG	54	40	View report →
85015	107	USG	59	40	View report →

Showing 15 of 20 ZIP codes. View all.

Air Quality Overview

Phoenix, Arizona has air quality rated Unhealthy for Sensitive Groups with an average AQI of 107. People with respiratory conditions, children, and older adults may experience health effects. The dominant pollutant is PM10.

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: PM10

PM10 is one of six criteria pollutants monitored by the EPA under the Clean Air Act. Elevated levels can cause respiratory irritation and may aggravate existing health conditions.

Air Quality by ZIP Code in Phoenix

AQI varies across Phoenix's 78 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

Showing 15 of 78 ZIP codes. Check your specific ZIP for detailed data.

Wildfire Smoke Risk

Phoenix has an elevated wildfire smoke risk with an average smoke risk score of 58 (scale 0-100). There have been 7,681 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	58
Max smoke risk score	59
Fires within 100 km	7,681
High-risk ZIP codes	78

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

Phoenix has an average mold risk score of 24 out of 100.

Factor	Value
Mold risk score	24/100
Average humidity	34% RH
High-risk ZIPs	0
Peak season	balanced

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 USG-level air quality (AQI 107), sensitive groups should limit outdoor exposure:

• Sensitive groups: avoid prolonged outdoor exertion
• General public: reduce prolonged or heavy outdoor exertion
• Keep windows and doors closed
• Run HEPA air purifiers continuously
• Wear N95 masks outdoors if prolonged exposure is unavoidable

Phoenix vs. Nearby Arizona Cities

How Phoenix's air quality compares to nearby cities:

ZIP Codes in Phoenix

Phoenix covers 78 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.