For 4/20/2024
[ The forecast is updated daily by 3:30 pm EDT. ]
As of the mid-afternoon hours on Friday, ground level ozone concentrations were trending toward peaks in the Yellow category for the Upstate and Charleston Tri-County zones. All other zones were trending toward peaks in the Green category. On Saturday, a cold front will stall across coastal South Carolina by late in the day. A few showers or thunderstorms are possible along the front, though most inland areas should be dry and see plenty of sun. With low pollutant concentrations and low weekend emission profiles, all zones are predicted to finish in the Green category.
| County * |
Color Code |
AQI |
| Abbeville |
Good (Green) |
48 |
| Aiken |
Good (Green) |
44 |
| Anderson |
Good (Green) |
48 |
| Barnwell |
Good (Green) |
44 |
| Berkeley |
Good (Green) |
45 |
| Calhoun |
Good (Green) |
45 |
| Charleston |
Good (Green) |
45 |
| Cherokee |
Good (Green) |
48 |
| Chester |
Good (Green) |
48 |
| Chesterfield |
Good (Green) |
48 |
| Darlington |
Good (Green) |
48 |
| Dillon |
Good (Green) |
48 |
| Dorchester |
Good (Green) |
45 |
| Edgefield |
Good (Green) |
44 |
| Fairfield |
Good (Green) |
45 |
| Florence |
Good (Green) |
48 |
| Greenville |
Good (Green) |
48 |
| Greenwood |
Good (Green) |
48 |
| Kershaw |
Good (Green) |
45 |
| Lancaster |
Good (Green) |
48 |
| Laurens |
Good (Green) |
48 |
| Lee |
Good (Green) |
48 |
| Lexington |
Good (Green) |
45 |
| Marlboro |
Good (Green) |
48 |
| McCormick |
Good (Green) |
44 |
| Newberry |
Good (Green) |
45 |
| Oconee |
Good (Green) |
48 |
| Pickens |
Good (Green) |
48 |
| Richland |
Good (Green) |
45 |
| Saluda |
Good (Green) |
45 |
| Spartanburg |
Good (Green) |
48 |
| Sumter |
Good (Green) |
45 |
| Union |
Good (Green) |
48 |
| York |
Good (Green) |
48 |
| GA-Columbia |
Good (Green) |
44 |
| GA-Richmond |
Good (Green) |
44 |
| * 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.
|
