South Carolina Ground-level Ozone Forecast

For 6/25/2019

[ The forecast is updated daily by 3:30 pm EDT. ]

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Ozone concentrations are being held down in the Green category in this hot and humid air mass as of 3 pm on Monday afternoon. A cold front will work its way through the state from west-to-east beginning late tonight, pushing offshore by Tuesday morning. The result will be a tug-of-war between clean sourcing from the NW and a much drier air mass that will be more efficient for ozone production. We expect many zones to reach near the green-yellow threshold, but falling just short of attaining yellow conditions. However, NW'rly wind direction historically favors code YELLOW for the Pee Dee and Trient zones, pushing these zones over the threshold, while all other zones are forecast to remain at high Code GREEN.
County * Color Code AQI
Abbeville Good (Green) 50
Aiken Good (Green) 48
Anderson Good (Green) 50
Barnwell Good (Green) 48
Berkeley Moderate (Yellow) 54
Calhoun Good (Green) 49
Charleston Moderate (Yellow) 54
Cherokee Good (Green) 50
Chester Good (Green) 49
Chesterfield Moderate (Yellow) 71
Darlington Moderate (Yellow) 71
Dillon Moderate (Yellow) 71
Dorchester Moderate (Yellow) 54
Edgefield Good (Green) 48
Fairfield Good (Green) 49
Florence Moderate (Yellow) 71
Greenville Good (Green) 50
Greenwood Good (Green) 50
Kershaw Good (Green) 49
Lancaster Good (Green) 49
Laurens Good (Green) 50
Lee Moderate (Yellow) 71
Lexington Good (Green) 49
Marlboro Moderate (Yellow) 71
McCormick Good (Green) 48
Newberry Good (Green) 49
Oconee Good (Green) 50
Pickens Good (Green) 50
Richland Good (Green) 49
Saluda Good (Green) 49
Spartanburg Good (Green) 50
Sumter Good (Green) 49
Union Good (Green) 50
York Good (Green) 49
GA-Columbia Good (Green) 48
GA-Richmond Good (Green) 48
* Ozone forecasts are not issued for counties not listed in this table.
AQI Color Code (Value) Cautionary Statement

Good
(0-50)

No health effects are expected.

Moderate
(51-100)

Unusually sensitive people should consider limiting prolonged outdoor exertion.

Unhealthy for Sensitive Groups
(101-150)

The following groups should limit prolonged outdoor exertion:

  • People with lung disease, such as asthma
  • Children and older adults
  • People who are active outdoors

Unhealthy
(151-200)

The following groups should avoid prolonged outdoor exertion:

  • People with lung disease, such as asthma
  • Children and older adults
  • People who are active outdoors

Everyone else should limit prolonged outdoor exertion.

Very Unhealthy
(200+)

The following groups should avoid all outdoor exertion:

  • People with lung disease, such as asthma
  • Children and older adults
  • People who are active outdoors

Everyone else should limit outdoor exertion.