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:

Thursday, July 29, 2010

Data from:

9:00:00 PM to 10:00:00 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	11 Good PM2.5	*	*	*	*	11	3.5	10	11.0
Applegate Valley	22 Good PM2.5	*	*	*	*	22	6.8	15	16.0
Baker City	25 Good PM2.5	*	*	*	*	25	7.8	17	18.0
Beaverton	13 Good PM2.5	*	*	*	*	13	4.1	9	10.0
Bend	45 Good O3	45	0.054	*	*	28	8.6	21	23.0
Big Lake	31 Good PM2.5	*	*	*	*	31	9.7	17	18.0
Burns	25 Good PM2.5	*	*	*	*	25	7.7	16	17.0
Cave Junction	17 Good PM2.5	*	*	*	*	17	5.3	14	15.0
Corvallis	9 Good PM10	*	*	*	*	9	2.8	9	10.0
Cove	20 Good PM2.5	*	*	*	*	20	6.2	17	18.0
Crater Lake	25 Good PM2.5	*	*	*	*	25	7.8	14	15.0
Grants Pass	21 Good PM2.5	*	*	*	*	21	6.5	16	17.0
Hermiston	45 Good O3	45	0.054	*	*	*	*	*	*
Hillsboro	12 Good PM2.5	*	*	*	*	12	3.7	9	10.0
John Day	21 Good PM2.5	*	*	*	*	21	6.5	15	16.0
Klamath Falls	24 Good PM2.5	*	*	*	*	24	7.5	16	17.0
La Grande	21 Good PM2.5	*	*	*	*	21	6.6	18	19.0
Lakeview	11 Good PM10	*	*	*	*	11	3.5	11	12.0
Lyons	20 Good PM2.5	*	*	*	*	20	6.1	11	12.0
Madras	35 Good PM2.5	*	*	*	*	35	10.9	24	26.0
McMinnville	11 Good PM2.5	*	*	*	*	11	3.4	9	10.0
Medford	40 Good O3	40	0.048	*	*	25	7.9	16	17.0
Mount Fanny	21 Good PM2.5	*	*	*	*	21	6.5	12	13.0
Pendleton	25 Good PM2.5	*	*	*	*	25	7.7	14	15.0
Portland	25 Good O3	25	0.030	2	0.2	19	5.9	12	13.0
Prineville	25 Good PM2.5	*	*	*	*	25	7.9	21	23.0
Roseburg	18 Good PM2.5	*	*	*	*	18	5.5	13	14.0
Salem	29 Good O3	29	0.035	*	*	14	4.3	10	11.0
Shady Cove	26 Good PM2.5	*	*	*	*	26	8.0	17	18.0
Silverton	18 Good PM2.5	*	*	*	*	18	5.5	12	13.0
Sweet Home	14 Good PM2.5	*	*	*	*	14	4.4	9	10.0
The Dalles	23 Good PM2.5	*	*	*	*	23	7.1	16	17.0

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)