Available Ambient Data by Pollutant

To get the latest available ambient data for a particular pollutant or meteorological measurement, select that monitor from the drop-down list. The data will be displayed below once you have made your selection. To display data from a past date, click "Change date."

All current values and statistics are averages for one-hour durations, unless the name of the monitor indicates otherwise.
     
Date: 10/07/2024 (Change date) (or select by County..Site)

*In 2016, the EPA rule for calculating the Ozone 8-Hour Average was changed to exclude 8-hour averages with start hours between 12 AM and 6 AM. Therefore, the 8-hour average for the current date is not available until after the 2 PM Standard Time ozone value has been collected.

CountySiteCurrent ReadingMinMaxAverage/ TotalUnitStatusHour (EST)
Alexander Taylorsville Liledoun 45 35 48 -- PPB normal 7:00 - 7:59 PM
Buncombe Bent Creek 42 27 44 -- PPB normal 7:00 - 7:59 PM
Caldwell Lenoir 45 45 45 -- PPB normal 7:00 - 7:59 PM
Caswell Cherry Grove 36 32 39 -- PPB normal 7:00 - 7:59 PM
Cumberland Honeycutt 46 41 47 -- PPB normal 7:00 - 7:59 PM
Cumberland Wade School 41 41 47 -- PPB normal 7:00 - 7:59 PM
Durham Durham Armory 33 32 40 -- PPB normal 7:00 - 7:59 PM
Edgecombe Leggett 34 34 42 -- PPB normal 7:00 - 7:59 PM
Graham Joanna Bald -- -- -- -- PPB off line --
Granville Butner 39 34 44 -- PPB normal 7:00 - 7:59 PM
Guilford Mendenhall 40 35 44 -- PPB normal 7:00 - 7:59 PM
Haywood Purchase Knob 49 47 49 -- PPB normal 7:00 - 7:59 PM
Haywood Waynesville Elementary School 44 30 49 -- PPB normal 7:00 - 7:59 PM
Johnston West Johnston 39 36 44 -- PPB normal 7:00 - 7:59 PM
Lenoir Lenoir Community College 38 38 47 -- PPB normal 7:00 - 7:59 PM
Lincoln Crouse 29 29 38 -- PPB normal 7:00 - 7:59 PM
Martin Jamesville 29 29 37 -- PPB normal 7:00 - 7:59 PM
New Hanover Castle Hayne 41 41 52 -- PPB normal 7:00 - 7:59 PM
Person Bushy Fork 37 34 41 -- PPB normal 7:00 - 7:59 PM
Pitt Pitt County Ag Center 42 40 46 -- PPB normal 7:00 - 7:59 PM
Rockingham Bethany 41 36 44 -- PPB normal 7:00 - 7:59 PM
Rowan Rockwell 41 35 47 -- PPB normal 7:00 - 7:59 PM
Swain Bryson City 38 22 39 -- PPB normal 7:00 - 7:59 PM
Union Monroe Middle School 56 42 59 -- PPB normal 7:00 - 7:59 PM
Wake Millbrook 42 37 46 -- PPB normal 7:00 - 7:59 PM

Note that these data are in raw form and have not been validated. These data should not be used in any medical or scientific studies. Validated data is available upon request.

Historically there have been three definitions of Air Quality Index ranges (the breakpoints that define color codes). For all dates before 12 March 2008, we use the "1997 breakpoints" for displaying colors. For dates between 12 March 2008 and 27 December 2015, we use the "2008 breakpoints." View the color code breakpoints.

The data reported from Buncombe County are collected by the Asheville-Buncombe Air Quality Agency.
The data reported from Station 160 are collected by ERM.
View pollutant and meteorological descriptions.