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).

The accompanying map highlights counties in which AQI pollutant monitors are located. The populations represented by these monitors may include other whole or partial surrounding counties.

Note: Air Quality standards for each pollutant are subject to revision by the Federal EPA about once every five years. Current data ranges and health advisory information are shown here.

This page was last updated on: Wed May 22 2013 08:00:00 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	42	PARTICULATE MATTER(2.5)	10.3 µg/m3	GREEN	GOOD	5/22/13 3:00 AM
ASHEVILLE	18	OZONE	21 ppb	GREEN	GOOD	5/22/13 1:00 AM
CHARLOTTE - GASTONIA - CONCORD - SALISBURY	52	PARTICULATE MATTER(2.5)	12.9 µg/m3	YELLOW	MODERATE	5/22/13 1:00 AM
	15	OZONE	18 ppb	GREEN	GOOD	5/22/13 7:00 AM
	0	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	5/21/13 9:00 AM
FAYETTEVILLE	29	PARTICULATE MATTER(2.5)	7.2 µg/m3	GREEN	GOOD	5/22/13 1:00 AM
GREENVILLE	20	OZONE	24 ppb	GREEN	GOOD	5/22/13 1:00 AM
	15	PARTICULATE MATTER(2.5)	3.7 µg/m3	GREEN	GOOD	5/22/13 3:00 AM
	0	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	5/21/13 11:00 AM
HICKORY - MORGANTON - LENOIR	54	PARTICULATE MATTER(2.5)	13.7 µg/m3	YELLOW	MODERATE	5/22/13 1:00 AM
RALEIGH - DURHAM - CHAPEL HILL	37	PARTICULATE MATTER(2.5)	9.2 µg/m3	GREEN	GOOD	5/22/13 2:00 AM
RALEIGH - DURHAM - CHAPEL HILL	25	OZONE	29 ppb	GREEN	GOOD	5/22/13 1:00 AM
ROCKY MOUNT	35	PARTICULATE MATTER(2.5)	8.6 µg/m3	GREEN	GOOD	5/22/13 1:00 AM
ROCKY MOUNT	21	OZONE	25 ppb	GREEN	GOOD	5/22/13 1:00 AM
WILMINGTON	24	PARTICULATE MATTER(2.5)	5.8 µg/m3	GREEN	GOOD	5/21/13 11:00 AM
	21	OZONE	25 ppb	GREEN	GOOD	5/22/13 1:00 AM
	0	SULFUR DIOXIDE	0 ppb	GREEN	GOOD	5/22/13 1:00 AM
WINSTON-SALEM - GREENSBORO - HIGH POINT	68	PARTICULATE MATTER(2.5)	18.4 µg/m3	YELLOW	MODERATE	5/21/13 10:00 AM
WINSTON-SALEM - GREENSBORO - HIGH POINT	28	OZONE	33 ppb	GREEN	GOOD	5/22/13 1:00 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