Division of Air Quality - Latest Available Air Quality Index Readings



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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: Tue Jul 08 2008 08:00:00 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
RALEIGH - DURHAM - CHAPEL HILL	56	PARTICULATE MATTER(2.5)	17.5 µg/m3	YELLOW	MODERATE	7/8/08 7:00 PM
	41	OZONE	0.048 ppm	GREEN	GOOD	7/7/08 8:00 PM
	12	PARTICULATE MATTER(10)	13.0 µg/m3	GREEN	GOOD	7/7/08 8:00 PM
WINSTON-SALEM - GREENSBORO - HIGH POINT	59	PARTICULATE MATTER(2.5)	18.9 µg/m3	YELLOW	MODERATE	7/7/08 8:00 PM
	49	OZONE	0.058 ppm	GREEN	GOOD	7/7/08 9:00 PM
	25	PARTICULATE MATTER(10)	26.6 µg/m3	GREEN	GOOD	7/8/08 10:00 AM
HICKORY - MORGANTON - LENOIR	66	PARTICULATE MATTER(2.5)	21.6 µg/m3	YELLOW	MODERATE	7/8/08 5:00 PM
HICKORY - MORGANTON - LENOIR	44	OZONE	0.052 ppm	GREEN	GOOD	7/8/08 5:00 PM
FAYETTEVILLE	34	OZONE	0.040 ppm	GREEN	GOOD	7/8/08 7:00 PM
FAYETTEVILLE	32	PARTICULATE MATTER(2.5)	9.8 µg/m3	GREEN	GOOD	7/8/08 5:00 PM
WILMINGTON	40	PARTICULATE MATTER(2.5)	12.2 µg/m3	GREEN	GOOD	7/7/08 8:00 PM
WILMINGTON	28	OZONE	0.033 ppm	GREEN	GOOD	7/7/08 8:00 PM
ASHEVILLE	55	PARTICULATE MATTER(2.5)	17.1 µg/m3	YELLOW	MODERATE	7/8/08 3:00 PM
ASHEVILLE	50	OZONE	0.059 ppm	GREEN	GOOD	7/8/08 10:00 AM
GREENVILLE	39	OZONE	0.046 ppm	GREEN	GOOD	7/7/08 8:00 PM
GREENVILLE	31	PARTICULATE MATTER(2.5)	9.7 µg/m3	GREEN	GOOD	7/8/08 6:00 PM
CHARLOTTE - GASTONIA - ROCK HILL	Air Quality Index courtesy of Mecklenburg County Department of Environmental Protection

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