Oregon DEQ: AQI

The Air Quality Index (AQI) is a color-coded tool which shows air pollution levels. Green is good, yellow is moderate, orange is unhealthy for sensitive groups, and red is unhealthy for all groups. DEQ issues Air Pollution Advisories when we forecast air pollution levels above the yellow, or moderate, AQI category and remain there for more than 72 hours.

The AQI for particulate matter (both PM_2.5 and PM₁₀) is based on the average of the previous 24 hours of pollution levels. Particle pollution is often highest during the coldest times of the day, typically in the evening and early morning.

Air Quality Index calculated for:

Wednesday, May 23, 2012

Data from:

11:00:00 AM to 12:00:00 PM Pacific Standard Time (PST)

Monitoring Area	Current Hourly AQI	Ozone		Carbon Monoxide		PM-2.5		PM-10
		8-Hour		8-Hour		24-Hour		24-Hour
		AQI	ppm	AQI	ppm	AQI	µg/m³	AQI	µg/m³

Albany	9 Good PM10	*	*	*	*	9	2.9	9	10.0
Applegate Valley	10 Good PM10	*	*	*	*	5	1.7	10	11.0
Baker City	11 Good PM10	*	*	*	*	9	2.9	11	12.0
Beaverton	8 Good PM10	*	*	*	*	8	2.5	8	9.0
Bend	33 Good O3	33	0.039	*	*	5	1.5	10	11.0
Burns	12 Good PM10	*	*	*	*	11	3.4	12	13.0
Cave Junction	11 Good PM10	*	*	*	*	8	2.5	11	12.0
Corvallis	11 Good PM2.5	*	*	*	*	11	3.4	9	10.0
Enterprise	10 Good PM10	*	*	*	*	5	1.6	10	11.0
Grants Pass	10 Good PM10	*	*	*	*	4	1.1	10	11.0
Hermiston	30 Good O3	30	0.036	*	*	*	*	*	*
Hillsboro	7 Good PM10	*	*	*	*	6	1.9	7	8.0
John Day	11 Good PM10	*	*	*	*	10	3.1	11	12.0
Klamath Falls	10 Good PM10	*	*	*	*	6	1.8	10	11.0
La Grande	14 Good PM10	*	*	*	*	9	2.8	14	15.0
Lakeview	10 Good PM10	*	*	*	*	10	3.0	10	11.0
Medford	33 Good O3	33	0.039	*	*	8	2.6	12	13.0
Pendleton	10 Good PM10	*	*	*	*	7	2.1	10	11.0
Portland	27 Good O3	27	0.032	*	*	11	3.3	9	10.0
Prineville	11 Good PM10	*	*	*	*	6	1.8	11	12.0
Roseburg	(Monitor Currently Offline)	*	*	*	*	*	*	*	*
Salem	24 Good O3	24	0.029	*	*	8	2.6	8	9.0
Shady Cove	11 Good PM10	*	*	*	*	9	2.8	11	12.0
Sisters	10 Good PM10	*	*	*	*	3	1.0	10	11.0
Sweet Home	10 Good PM2.5	*	*	*	*	10	3.2	9	10.0
The Dalles	11 Good PM10	*	*	*	*	7	2.2	11	12.0

To access monitoring Station AQI's for the Metropolitan Areas click the city name link under "Monitoring Area".

Additional Oregon AQI's:

Eugene - Lane Regional Air Protection Agency (LRAPA)
Ontario Area / Treasure Valley, Idaho (links to Idaho DEQ)
Vancouver, WA - SouthWest Clean Air Agency (SWCAA)

The DEQ Data System always runs on Pacific Standard Time (PST). This creates the appearance of a one hour time shift during the months of May through October. The data displayed is the most current data available.

All readings are preliminary (unvalidated). All values are subject to change following final review.

New readings will be available at approximately 10 minutes past the hour. "Refresh" or "Reload" the page to see the most current values.

PPM stands for parts per million, a measurement of the pollution concentration in the air.

ug/m3 stands for micro grams per cubic meter.

The U. S. Environmental Protection Agency's scale for rating air quality

Air Quality Rating	Air Quality Index (AQI)	PM2.5 24-hour Average (micrograms/m3)	8-hour Ozone Concentration (ppm)	Carbon Monoxide 8-hour average (ppm)
GOOD	0-50	0.0-15.4	0.000-0.059	0.0-4.4
MODERATE	51-100	15.5-35.4	0.060-0.075	4.5-9.4
UNHEALTHY for Sensitive Groups	101-150	35.5-55.4	0.076-0.095	9.5-12.4
UNHEALTHY	151-200	55.5-140.4	0.096-0.115	12.5-15.4
VERY UNHEALTHY	201-300	140.5-210.4	0.116-0.374	15.5-30.4
HAZARDOUS	>300	>210.5	>0.375	>30.4

National Ambient Air Quality Standard (NAAQS)