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. Youngtown'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 by ZIP Code in Youngtown

AQI varies across Youngtown's 1 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
85363	107	USG	59	18	View report →

Air Quality Overview

Youngtown, 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 Youngtown

AQI varies across Youngtown's 1 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

Wildfire Smoke Risk

Youngtown has an elevated wildfire smoke risk with an average smoke risk score of 59 (scale 0-100). There have been 90 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	59
Max smoke risk score	59
Fires within 100 km	90
High-risk ZIP codes	1

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

Youngtown has an average mold risk score of 18 out of 100.

Factor	Value
Mold risk score	18/100
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

Youngtown vs. Nearby Arizona Cities

How Youngtown's air quality compares to nearby cities:

ZIP Codes in Youngtown

Youngtown covers 1 ZIP code. 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.