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Ground Level Ozone Seasons Starts Soon

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Prepare by signing up for air quality forecasts now

High concentrations of ground-level ozone (aka smog) can create breathing problems, especially for children, people with asthma or other respiratory problems, and adults who work or exercise outdoors.

In South Carolina, high ozone concentrations generally occur on hot, sunny days when the air is stagnant; for that reason, the ozone season runs from March 31 through September 30.

During that time, DHEC provides daily ozone forecasts to help the public make healthy decisions about outdoor activities. Here's how you can access the daily ozone forecast beginning March 31:

For more information about ground-level ozone pollution, visit