N.C. Department of Environment and Natural Resources
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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: Sat Feb 11 2012 08:00:00 PM EST

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

Area AQI Responsible Pollutant Pollutant Concentration Color Code Air Quality Time of Maximum
ASHEVILLE 53 PARTICULATE MATTER(2.5) 16.5 µg/m3
YELLOW
MODERATE 2/11/12
1:00 AM
37 OZONE 44 ppb
GREEN
GOOD 2/10/12
8:00 PM
CHARLOTTE - GASTONIA - CONCORD - SALISBURY 67 PARTICULATE MATTER(2.5) 22.0 µg/m3
YELLOW
MODERATE 2/11/12
9:00 AM
26 OZONE 31 ppb
GREEN
GOOD 2/11/12
7:00 PM
FAYETTEVILLE 63 PARTICULATE MATTER(2.5) 20.3 µg/m3
YELLOW
MODERATE 2/11/12
11:00 AM
GREENVILLE 42 PARTICULATE MATTER(2.5) 12.8 µg/m3
GREEN
GOOD 2/11/12
1:00 PM
HICKORY - MORGANTON - LENOIR 86 PARTICULATE MATTER(2.5) 29.8 µg/m3
YELLOW
MODERATE 2/11/12
7:00 AM
RALEIGH - DURHAM - CHAPEL HILL 60 PARTICULATE MATTER(2.5) 19.1 µg/m3
YELLOW
MODERATE 2/11/12
10:00 AM
24 OZONE 28 ppb
GREEN
GOOD 2/11/12
7:00 PM
4 SULFUR DIOXIDE 3 ppb
GREEN
GOOD 2/11/12
10:00 AM
ROCKY MOUNT 54 PARTICULATE MATTER(2.5) 16.7 µg/m3
YELLOW
MODERATE 2/11/12
2:00 AM
WILMINGTON 56 PARTICULATE MATTER(2.5) 17.7 µg/m3
YELLOW
MODERATE 2/11/12
2:00 PM
15 SULFUR DIOXIDE 10 ppb
GREEN
GOOD 2/11/12
11:00 AM
WINSTON-SALEM - GREENSBORO - HIGH POINT 76 PARTICULATE MATTER(2.5) 25.5 µg/m3
YELLOW
MODERATE 2/11/12
8:00 AM
1 SULFUR DIOXIDE 1 ppb
GREEN
GOOD 2/11/12
11:00 AM

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

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