AIR QUALITY AZ USG

Air Quality Alert: Surprise, AZ — 107 AQI

AQI 107 · USG · PM10 · Updated 2026-05-03

Surprise's air quality is unhealthy for sensitive groups. People with respiratory conditions should limit outdoor activity.

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

107

Average AQI

USG

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. Surprise'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: Surprise, 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 Surprise

AQI varies across Surprise's 5 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
85374	107	USG	54	14	View report →
85378	107	USG	54	19	View report →
85379	107	USG	59	14	View report →
85387	107	USG	54	17	View report →
85388	107	USG	54	14	View report →

Air Quality Overview

Surprise, 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 Surprise

AQI varies across Surprise's 5 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Wildfire Risk	Mold Score
85374	107	USG	54	14
85378	107	USG	54	19
85379	107	USG	59	14
85387	107	USG	54	17
85388	107	USG	54	14

Wildfire Smoke Risk

Surprise has an elevated wildfire smoke risk with an average smoke risk score of 55 (scale 0-100). There have been 439 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	55
Max smoke risk score	59
Fires within 100 km	439
High-risk ZIP codes	5

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

Surprise has an average mold risk score of 16 out of 100.

Factor	Value
Mold risk score	16/100
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

Surprise vs. Nearby Arizona Cities

How Surprise's air quality compares to nearby cities:

City	AQI	Category	Population
Surprise	107	USG	201,210
Peoria	148	USG	200,289
Glendale Luke Afb	148	USG	234,766
Tempe	72	Moderate	166,887

ZIP Codes in Surprise

Surprise covers 5 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 Surprise?

Surprise's average AQI is 107 (USG). This level poses health risks, especially for people with respiratory conditions, children, and the elderly. Air purifiers and limiting outdoor activity on high-AQI days are recommended.

How many unhealthy air days does Surprise have?

Surprise experiences 70 unhealthy air quality days per year on average. During these days, everyone — not just sensitive groups — should reduce prolonged outdoor exertion.

What is the AQI in Surprise?

The average Air Quality Index (AQI) in Surprise is 107, categorized as USG. The primary pollutant is PM10. 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 Surprise?

Surprise has a wildfire risk score of 55 out of 100. Moderate wildfire risk means smoke events are possible. Having a HEPA air purifier available is recommended.

Is mold a concern in Surprise?

Surprise has a mold risk score of 16 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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