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.

Important Notice: In January 2008 the PM_2.5 AQI health levels were revised to correspond with the new (2006) PM_2.5 Standard. The PM_2.5 ranges were lowered for all health ranges except Good. Revisions to PM_2.5 AQI Ranges.

Air Quality Index calculated for:

Monday, December 01, 2008

Data from:

5:00:00 PM to 6:00:00 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	20 Good PM2.5	*	*	*	*	20	6.1	13	14.0
Applegate Valley	21 Good PM2.5	*	*	*	*	21	6.6	15	16.0
Baker City	32 Good PM2.5	*	*	*	*	32	9.9	19	20.0
Beaverton	21 Good PM2.5	*	*	*	*	21	6.4	12	13.0
Bend	34 Good PM2.5	*	*	*	*	34	10.4	24	26.0
Burns	60 Moderate PM2.5	*	*	*	*	60	19.1	29	31.0
Cave Junction	17 Good PM2.5	*	*	*	*	17	5.2	14	15.0
Corvallis	24 Good PM2.5	*	*	*	*	24	7.3	14	15.0
Cove	34 Good PM2.5	*	*	*	*	34	10.4	20	22.0
Enterprise	33 Good PM2.5	*	*	*	*	33	10.2	19	20.0
Grants Pass	29 Good PM2.5	*	*	*	*	29	9.0	17	18.0
Hillsboro	50 Good PM2.5	*	*	*	*	50	15.4	20	22.0
John Day	42 Good PM2.5	*	*	*	*	42	13.0	21	23.0
Klamath Falls	115 UFSG PM2.5	*	*	*	*	115	41.4	53	60.0
La Grande	47 Good PM2.5	*	*	*	*	47	14.5	23	25.0
Lakeview	111 UFSG PM2.5	*	*	*	*	111	39.6	64	81.0
Madras	72 Moderate PM2.5	*	*	*	*	72	24.1	44	48.0
McMinnville	26 Good PM2.5	*	*	*	*	26	8.0	13	14.0
Medford	46 Good PM2.5	*	*	14	1.3	46	14.3	22	24.0
Pendleton	27 Good PM2.5	*	*	*	*	27	8.5	15	16.0
Portland	35 Good PM2.5	13	0.016	10	0.9	35	10.8	19	20.0
Prineville	119 UFSG PM2.5	*	*	*	*	119	43.0	62	78.0
Roseburg	23 Good PM2.5	*	*	*	*	23	7.1	15	16.0
Salem	20 Good PM2.5	*	*	*	*	20	6.1	12	13.0
Shady Cove	20 Good PM2.5	*	*	*	*	20	6.1	15	16.0
Sweet Home	53 Moderate PM2.5	*	*	*	*	53	16.5	22	24.0
The Dalles	33 Good PM2.5	*	*	*	*	33	10.3	19	21.0

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)