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: Thu Sep 02 2010 09:00:00 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	73	OZONE	67 ppb	YELLOW	MODERATE	9/2/10 9:00 AM
ASHEVILLE	50	PARTICULATE MATTER(2.5)	15.4 µg/m3	GREEN	GOOD	9/2/10 5:00 PM
CHARLOTTE - GASTONIA - CONCORD - SALISBURY	86	OZONE	71 ppb	YELLOW	MODERATE	9/2/10 7:00 PM
	71	PARTICULATE MATTER(2.5)	23.5 µg/m3	YELLOW	MODERATE	9/2/10 7:00 PM
	1	SULFUR DIOXIDE	1 ppb	GREEN	GOOD	9/2/10 9:00 AM
FAYETTEVILLE	47	OZONE	56 ppb	GREEN	GOOD	9/1/10 9:00 PM
GREENVILLE	60	PARTICULATE MATTER(2.5)	19.2 µg/m3	YELLOW	MODERATE	9/1/10 9:00 PM
	47	OZONE	56 ppb	GREEN	GOOD	9/1/10 9:00 PM
	0	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	9/1/10 9:00 PM
HICKORY - MORGANTON - LENOIR	69	OZONE	66 ppb	YELLOW	MODERATE	9/2/10 7:00 PM
HICKORY - MORGANTON - LENOIR	51	PARTICULATE MATTER(2.5)	15.5 µg/m3	YELLOW	MODERATE	9/2/10 7:00 PM
RALEIGH - DURHAM - CHAPEL HILL	86	OZONE	71 ppb	YELLOW	MODERATE	9/1/10 9:00 PM
	57	PARTICULATE MATTER(2.5)	18.1 µg/m3	YELLOW	MODERATE	9/2/10 9:00 AM
	1	SULFUR DIOXIDE	1 ppb	GREEN	GOOD	9/2/10 1:00 AM
ROCKY MOUNT	46	OZONE	54 ppb	GREEN	GOOD	9/1/10 9:00 PM
WILMINGTON	105	SULFUR DIOXIDE	83 ppb	ORANGE	UNHEALTHY FOR SENSITIVE GROUPS	9/2/10 11:00 AM
	48	OZONE	57 ppb	GREEN	GOOD	9/1/10 9:00 PM
	42	PARTICULATE MATTER(2.5)	13.0 µg/m3	GREEN	GOOD	9/1/10 9:00 PM
WINSTON-SALEM - GREENSBORO - HIGH POINT	115	OZONE	82 ppb	ORANGE	UNHEALTHY FOR SENSITIVE GROUPS	9/1/10 9:00 PM
	65	PARTICULATE MATTER(2.5)	21.2 µg/m3	YELLOW	MODERATE	9/1/10 10:00 PM
	28	PARTICULATE MATTER(10)	30.4 µg/m3	GREEN	GOOD	9/2/10 8:00 PM
	0	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	9/1/10 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