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. Miami's average AQI of 50 falls in the "Good" 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: Miami, FL

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 Miami

AQI varies across Miami's 96 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
33101	50	Good	63	79	View report →
33102	50	Good	32	66	View report →
33106	50	Good	63	62	View report →
33110	50	Good	63	62	View report →
33111	50	Good	63	62	View report →
33112	50	Good	68	62	View report →
33116	50	Good	63	66	View report →
33122	50	Good	63	60	View report →
33124	50	Good	63	62	View report →
33125	50	Good	63	83	View report →
33126	50	Good	63	78	View report →
33127	50	Good	63	75	View report →
33128	50	Good	63	70	View report →
33129	50	Good	63	73	View report →
33130	50	Good	63	63	View report →

Showing 15 of 20 ZIP codes. View all.

Air Quality Overview

Miami, Florida has good air quality with an average AQI of 50. This means air pollution poses little or no risk. The dominant pollutant measured 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 Miami

AQI varies across Miami's 96 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

Showing 15 of 96 ZIP codes. Check your specific ZIP for detailed data.

Wildfire Smoke Risk

Miami has an elevated wildfire smoke risk with an average smoke risk score of 64 (scale 0-100). There have been 6,821 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	64
Max smoke risk score	68
Fires within 100 km	6,821
High-risk ZIP codes	95

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

Miami has an average mold risk score of 70 out of 100, with 95 ZIP codes in the high-risk category.

Factor	Value
Mold risk score	70/100
Average humidity	78% RH
High-risk ZIPs	95
Peak season	summer 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 50), Miami 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

Miami vs. Nearby Florida Cities

How Miami's air quality compares to nearby cities:

ZIP Codes in Miami

Miami covers 96 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.