20 December 2024

Phoenix Air Quality Alerts: HIGH POLLUTION ADVISORY

Forecast Discussion:

Yesterday, PM10 did end up reaching the Unhealthy for Sensitive Groups AQI category while PM2.5 barely managed to stay in the Moderate category. We will continue to see quite weather conditions the next several days, which will allow for elevated particulate levels during the mornings and evenings. As for ozone, we expect it to easily stay in the Good AQI range.

Taking a closer look at particulates, we expect PM10 to improve a little. We anticipate less dust-generating work activities over the weekend and around the holiday next week. As a result, we are forecasting PM10 to be in the mid-to-upper Moderate range through the forecast period. As for PM2.5, we expect concentrations to increase over the weekend with a likely increase in fireplace usage. Looking out to Christmas Eve, there is still some uncertainty.

AirNow.gov

21 hours ago

National Maps | AirNow.gov

Air Quality Forecast

24°C

16°C

23°C

16°C

23°C

15°C

23°C

16°C

23°C

16°C

PM_2.5
O₃
	Friday 20th								Saturday 21st								Sunday 22nd								Monday 23rd								Tuesday 24
hour	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15
Wind Speed (m/s)

Temp.
	UVI: 3 7:29 ~ 17:25								UVI: 4 7:29 ~ 17:26								UVI: 3 7:30 ~ 17:26								UVI: 4 7:30 ~ 17:27								UVI: 4 7:31 ~ 17:27

Forecast plotted using timezone -07:00

Updated On: 12/20/2024 - 8:44 AM

Click on each day to view forecast.

Friday Forecast:

Alert: PM_2.5 High Pollution Advisory in effect for Friday | Health Impacts >

Ozone

43 AQI
Max 8-hr Avg: 46 ppb

PM₁₀

89 AQI
24-hr Avg: 132 µg/m3

PM_2.5

101 AQI
24-hr Avg: 35.6 µg/m3

Air Quality By Pollutant:

Pollutant

Friday
12/20/2024

Saturday
12/21/2024

Sunday
12/22/2024

Monday
12/23/2024

Tuesday
12/24/2024

O₃

PM₁₀

PM_2.5

101

113

101

O₃ = Ozone, PM₁₀ = Particles ≤ 10 microns, PM_2.5 = Particles ≤ 2.5 micronsAbout the Air Quality Levels

AQI	Air Pollution Level	Health Implications	Cautionary Statement (for PM2.5)
0 - 50	Good	Air quality is considered satisfactory, and air pollution poses little or no risk	None
51 -100	Moderate	Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150	Unhealthy for Sensitive Groups	Members of sensitive groups may experience health effects. The general public is not likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200	Unhealthy	Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects	Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300	Very Unhealthy	Health warnings of emergency conditions. The entire population is more likely to be affected.	Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+	Hazardous	Health alert: everyone may experience more serious health effects	Everyone should avoid all outdoor exertion