N.C. Department of Environment and Natural Resources
 Welcome to the North Carolina Division of Air Quality
Monitoring Data >> Latest Available Air Quality Index Readings

This table shows the current maximum Air Quality Index (AQI) readings representing the indicated Metropolitan Statistical Areas over the past 24 hours and may include data from yesterday. The supporting data have not been fully validated (more information).

Note: In 2007 the Federal EPA revised the National Ambient Air Quality Standard for PARTICULATE MATTER(2.5) maximum 24-hour concentrations to a lower threshold. An equivalent revision is appropriate for the Air Quality Index, but EPA has not yet provided one. However, many air quality reporting organizations have modified their local reports and forecasts to reflect the new standard more accurately. In June 2008, we similarly revised the threshold between moderate and unhealthy for sensitive groups in the report displayed below. (more information)

This page was last updated on: Sun Sep 05 2010 10:00:00 PM EDT

Entries highlighted in boldface type represent the "critical pollutant" information.

Area AQI Responsible Pollutant Pollutant Concentration Color Code Air Quality Time of Maximum
ASHEVILLE 42 OZONE 49 ppb
GREEN
GOOD 9/5/10
7:00 PM
27 PARTICULATE MATTER(2.5) 8.4 µg/m3
GREEN
GOOD 9/5/10
3:00 PM
CHARLOTTE - GASTONIA - CONCORD - SALISBURY 43 OZONE 51 ppb
GREEN
GOOD 9/5/10
7:00 PM
39 PARTICULATE MATTER(2.5) 12.0 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
0 SULFUR DIOXIDE 0 ppb
GREEN
GOOD 9/4/10
10:00 PM
FAYETTEVILLE 42 OZONE 49 ppb
GREEN
GOOD 9/5/10
8:00 PM
31 PARTICULATE MATTER(2.5) 9.6 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
GREENVILLE 40 OZONE 47 ppb
GREEN
GOOD 9/4/10
10:00 PM
35 PARTICULATE MATTER(2.5) 10.8 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
0 SULFUR DIOXIDE 0 ppb
GREEN
GOOD 9/4/10
10:00 PM
HICKORY - MORGANTON - LENOIR 42 OZONE 50 ppb
GREEN
GOOD 9/5/10
8:00 PM
19 PARTICULATE MATTER(2.5) 5.7 µg/m3
GREEN
GOOD 9/5/10
8:00 PM
RALEIGH - DURHAM - CHAPEL HILL 44 OZONE 52 ppb
GREEN
GOOD 9/5/10
7:00 PM
25 PARTICULATE MATTER(2.5) 7.6 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
0 SULFUR DIOXIDE 0 ppb
GREEN
GOOD 9/4/10
10:00 PM
ROCKY MOUNT 40 OZONE 47 ppb
GREEN
GOOD 9/5/10
7:00 PM
WILMINGTON 100 SULFUR DIOXIDE 74 ppb
YELLOW
MODERATE 9/5/10
12:00 PM
50 PARTICULATE MATTER(2.5) 15.4 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
42 OZONE 49 ppb
GREEN
GOOD 9/5/10
8:00 PM
WINSTON-SALEM - GREENSBORO - HIGH POINT 47 OZONE 55 ppb
GREEN
GOOD 9/5/10
9:00 PM
24 PARTICULATE MATTER(2.5) 7.4 µg/m3
GREEN
GOOD 9/5/10
3:00 AM
14 PARTICULATE MATTER(10) 14.6 µg/m3
GREEN
GOOD 9/4/10
10:00 PM
0 SULFUR DIOXIDE 0 ppb
GREEN
GOOD 9/4/10
10:00 PM

General Information About AQI
Frequently Asked Questions
Current Data from Other Areas in NC
National AQI Overview (EPA AIRNOW)
National Ambient Air Quality Standards (NAAQS)
NC Air Awareness Program

Email us


 Visit the NCDENR web portal
Top of Page