Your Air Quality

  • Jun 29, 2010
  • Greg Blanchard
Image Your Air Quality

State and federal air quality forecasts combine observations made by Manatee County's own monitoring stations with those from monitoring stations in the region to form sophisticated, but easy to interpret, depictions of Manatee County's air quality. We recommend those interested in our local air quality to look at the U.S. Environmental Protection Agency's AirNow forecast, one of the best of these forecasts. Many air pollutants may affect our air quality. Ozone is by far the most significant in Florida.

Local Ambient Air Quality Monitoring Stations

Air quality monitoring station locations
Air quality monitoring station locations

The Natural Resources Department operates three ambient air quality monitoring stations within Manatee County. These stations are located where our air quality may be most affected by urban development.


US EPA AirNow National and Regional Daily Air Quality Forecasts

Air quality monitoring station at GT Bray park
Air quality monitoring station at GT Bray park

Today's Air Quality Forecast (*Opens in New Tab)



The Air Quality Index


The Air Quality Index (AQI) (*Opens in New Tab) is an index for reporting daily air quality. It tells how clean or polluted your outdoor 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.


The AirNow Website


The U.S. EPA, NOAA, NPS, tribal, state, and local agencies developed the AirNow website to provide the public with easy access to national air quality information. The website offers daily AQI forecasts as well as real-time AQI conditions for over 300 cities across the US, and provides links to more detailed state and local air quality websites.


Air Quality Forecasts (*Opens in New Tab) - Nationwide daily air quality forecasts provided
by state and local air agencies for over 300 major U.S. cities.


Air Quality Conditions (*Opens in New Tab) - Nationwide and regional real-time ozone air
quality maps covering 46 US states and parts of Canada. These maps are updated daily every hour.


About the Data


The air quality data used in these maps and to generate forecasts are collected using either federal reference or equivalent monitoring techniques or techniques approved by the state, local or tribal monitoring agencies. 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 are performed, the data as such are not fully verified and validated through the quality assurance procedures monitoring organizations use to officially submit and certify data on the EPA Air Quality System (AQS). Therefore, data are used on the AirNow website only for the purpose of reporting the AQI. Information on the AirNow website is not used to formulate or support regulation, guidance or any other agency decision or position.


(Source:, accessed on 6-30-2010)

About Ground-level Ozone

Ozone monitoring instrument
Ozone monitoring instrument


Ozone (O3) is a gas composed of three oxygen atoms. It is not usually emitted directly into the air, but at ground level is created by a chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight. Ozone has the same chemical structure whether it occurs miles above the earth or at ground level and can be "good" or "bad," depending on its location in the atmosphere.
In the earth's lower atmosphere, ground level ozone is considered "bad." Motor vehicle exhaust and industrial emissions, gasoline vapors, and chemical solvents, as well as natural sources, emit NOx and VOC that help form ozone. Ground level ozone is the primary constituent of smog. Sunlight and hot weather cause ground level ozone to form in harmful concentrations in the air. As a result, it is known as a summertime air pollutant. Many urban areas tend to have high levels of "bad" ozone, but even rural areas are also subject to increased ozone levels because wind carries ozone and pollutants that form it hundreds of miles away from their original sources.
"Good" ozone occurs naturally in the stratosphere approximately 10 to 30 miles above the earth's surface and forms a layer that protects life on earth from the sun's harmful rays.
(Source: accessed on 7/1/2010)