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: Mon May 21 2012 10:00:00 AM 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	76	OZONE	68 ppb	YELLOW	MODERATE	5/21/12 7:00 AM
ASHEVILLE	42	PARTICULATE MATTER(2.5)	12.8 µg/m3	GREEN	GOOD	5/20/12 10:00 AM
CHARLOTTE - GASTONIA - CONCORD - SALISBURY	93	OZONE	73 ppb	YELLOW	MODERATE	5/20/12 7:00 PM
	30	PARTICULATE MATTER(2.5)	9.2 µg/m3	GREEN	GOOD	5/20/12 11:00 AM
	1	SULFUR DIOXIDE	1 ppb	GREEN	GOOD	5/20/12 10:00 AM
FAYETTEVILLE	45	OZONE	53 ppb	GREEN	GOOD	5/20/12 5:00 PM
FAYETTEVILLE	26	PARTICULATE MATTER(2.5)	8.1 µg/m3	GREEN	GOOD	5/20/12 8:00 PM
GREENVILLE	21	PARTICULATE MATTER(2.5)	6.6 µg/m3	GREEN	GOOD	5/20/12 8:00 PM
HICKORY - MORGANTON - LENOIR	62	OZONE	64 ppb	YELLOW	MODERATE	5/20/12 6:00 PM
HICKORY - MORGANTON - LENOIR	32	PARTICULATE MATTER(2.5)	9.8 µg/m3	GREEN	GOOD	5/20/12 11:00 AM
RALEIGH - DURHAM - CHAPEL HILL	49	OZONE	58 ppb	GREEN	GOOD	5/20/12 5:00 PM
	23	PARTICULATE MATTER(2.5)	7.1 µg/m3	GREEN	GOOD	5/20/12 5:00 PM
	1	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	5/20/12 10:00 AM
ROCKY MOUNT	24	PARTICULATE MATTER(2.5)	7.4 µg/m3	GREEN	GOOD	5/20/12 5:00 PM
WILMINGTON	32	OZONE	38 ppb	GREEN	GOOD	5/20/12 4:00 PM
	22	PARTICULATE MATTER(2.5)	6.8 µg/m3	GREEN	GOOD	5/20/12 12:00 PM
	2	SULFUR DIOXIDE	2 ppb	GREEN	GOOD	5/20/12 10:00 AM
WINSTON-SALEM - GREENSBORO - HIGH POINT	59	OZONE	63 ppb	YELLOW	MODERATE	5/20/12 7:00 PM
	29	PARTICULATE MATTER(2.5)	8.8 µg/m3	GREEN	GOOD	5/20/12 7:00 PM
	6	SULFUR DIOXIDE	4 ppb	GREEN	GOOD	5/20/12 9:00 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