Air Quality Index

​​​​​​​​​​​​​​​​​​​​​​​​​What is the Air Quality Index (AQI)?​​​

The Air Quality Index (AQI) is an index developed by the Environmental Protection Agency (EPA), for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur dioxide, and nitrogen dioxide. For each of these pollutants, EPA has established national air quality standards to protect public health. Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.

Understanding the AQI 

The AQI is divided into 6 levels. Each level corresponds to a different level of health concern based on the local air quality. The higher the AQI value, the greater the level of air pollution. The higher the air pollution, the greater the health concern.


Air Quality
Air Quality Index ​Values
Health impacts
Corresponding Color​
​Good
​0-50
No health impacts are expected when air quality is in this range. 
Green
Moderate
51-100
Unusually sensitive people should consider limiting prolonged outdoor exertion.
Yellow
​Unhealthy for Sensitive Groups
101-150
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
​Orange
Unhealthy
​151-200
​Active children and adults and people with respiratory disease such as asthma, should avoid prolonged outdoor exertion: everyone else, especially children, should limit prolonged outdoor exertion.
​Red
Very Unhealthy
​201-300
​Active children and adults and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
​Purple
Hazardous
​301+ and higher.
Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion, everyone else, especially children, should limit outdoor exertion.​​
​Maroon

Broward County Air Quality Index (AQI) Summaries

​2025 AQI Summary​​


​Month
​Number of Good Days 
​Number of Moderate Days
​Number of Unhealthy for Sensitive Group Days
​Number of Unhealthy Days
​January
24
7
0
0
​February
​25
​3
0
0
​March
6
25
0
0
​April
​14
16
0
0
​May
28
3
0
0
​June
​18
12
0
0
​July
16
15
0
0
​August​
​

​September 


​October 
​

​November​
​

​December


​TOTALS
131
81
0
0
​Percent
61.8%
38.2%
0%
0%



​2024 AQI Summary​

​Month
​Number of Good Days 
​Number of Moderate Days
​Number of Unhealthy for Sensitive Group Days
​Number of Unhealthy Days
​January
​28
​2
​0

​1
​February
​23
6
0
0
​March
​26
5
0
0
​April
​9
21
0
0
​May
​12
19
0
0
​June
​15
15
0
0
​July
6
25
0
0
​August​
15
16
0
0
​September 
28
2
0
0
​October 
28
3
0
0
​November​
24
6
0
0
​December
26
5
0
0
​TOTALS
240
125
0
1
​Percent
65.57%
34.15%
​0%​
0.27​%​

​

2023 AQI Summary

​Month
​Number of Good Days 
​Number of Moderate Days
​Number of Unhealthy for Sensitive Group Days
​Number of Unhealthy Days
​January
​14
​16
​1
​0
​February
​12
​16
​0
​0
​March
​11
​20
​0
​0
​April
​21
9
0
​​0
​May
​16
​15
​0
​0
​June
​29
​1
​0
​0
​July
​14
​17
​0
0
​August​
​16
​15
​0
​0
​September 
27
3
​0
​0
​October 
​26
​4
​1
​0
​November​
​30
​0
​0
​0
​December
​28
​2
​1
​0
​TOTALS
244
118
3
​0
​Percent
66.85%
32.33%
​0.82%​
​0%​

​

2022 AQI Summary

​Month
​Number of Good Days 
​Number of Moderate Days
​Number of Unhealthy for Sensitive Group Days
​Number of Unhealthy Days
​January
​25
​6
​0
​0
​February
​25
​3
​0
​0
​March
​20
​11
​0
​0
​April
​22
8
0
​​0
​May
​24
​7
​0
​0
​June
​25
​5
​0
​0
​July
​25
​6
​0
0​
​August​
​26
​5
​0
​0
​September 
28
2
​0
​0
​October 
​29
​2
​0
​0
​November​
​29
​1
​0
​0
​December
​22
​9
​0
​0
​TOTALS
300
65
​0
​0
​Percent

82.19%
17.81%
​0%​
​0%​


2021 AQI Summary

​Month
​Number of Good Days 
​Number of Moderate Days
​Number of Unhealthy for Sensitive Group Days
​Number of Unhealthy Days
​January
​18
​13
​0
​0
​February
​17
​11
​0
​0
​March
​23
​8
​0
​0
​April
​17
13​
0​0​
​May
​25
​5
​1
​0
​June
​24
​6
​0
​0
​July
​23
​8
​0
​0
​August
​26
​5
​0
​0
​September 
21​9​​0
​0
​October 
​29
​2
​0
​0
​November​
​29
​1
​0
​0
​December
​28
​3
​0
​0
​TOTALS
280
84
​1
​0
​Percent
76.71%
23.0​1%
​0.27%​
​0%​

Access our Air Quality Index Summary Archive: 2007-2020. ​​

About the Data - The air quality data used in the AirNow maps and to generate forecasts are collected using either federal reference or equivalent monitoring methods. Since the information needed to make maps must be as "real-time" as possible, the data are displayed as soon as practical after the end of each hour. Although some preliminary data quality assessments may be performed, the data as such are not fully verified and validated through the quality assurance procedures that monitoring organizations use to officially submit and certify data to the EPA AQS (Air Quality System). Therefore, the data is used on the AirNow website only for the purpose of reporting the AQI. Information on the Air​Now website is not used to formulate or support regulation, guidance, or any other Agency decision or position.​

Source: AirNow​​​​​​

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