Arizona Air Quality Archives

Will The Valley See Its First Major Dust Storm of The Season This Week?

A persistently active monsoon pattern this week will has resulted in multiple chances at our first major dust storm. The Forecast Team has thus issued several PM10 (dust) High Pollution Watches for Phoenix this week.Read full article >

2021 Phoenix Air Quality Year In Review

A look back at the air quality and weather in 2021Read full article >

The "Big Four" Weren't So "Big" This Winter

Christmas Eve/Day and New Year's Eve/Day often see the highest PM-2.5 levels of the year in Phoenix. However, winds and rain ended up playing an important role in the outcome of these holidays in 2021-2022.Read full article >

Forecasting Air Quality on the Big Holidays: Not as Simple as You Might Think

When are HPA's issued?Read full article >

Significant Fall Storm System Coming Soon

A strong low pressure wave is forecast to move through Arizona on Monday-Tuesday, October 11-12. This will result in the first real temperature drop of the season, with highs plummeting to the low 70s on Tuesday.Read full article >

Easterly Monsoonal Winds Bring Smoke To Valley

As winds over Arizona shift to easterly (from the east), Phoenix sees smoke and potential changes to its air quality.Read full article >

2020 Arizona Air Quality Year In Review

A look back at the air quality across Arizona in 2020Read full article >

First Significant Dust Storm Of Monsoon 2020 Hits Phoenix

Two dust storms moved through the Valley causing Unhealthy air qualityRead full article >

Introducing The New High Pollution Watch

The ADEQ Forecast Team is introducing its new "High Pollution Watch," which will replace the previous "High Pollution Advisory Possible." The team is also retiring the "Health Watch." These changes will apply to all the Air Quality Index (AQI) forecast products and to every pollutant: Ozone, PM10, and PM2.5.Read full article >

Smoke Invades Arizona from Apple Fire

The Apple Fire, an active wildfire in California, sent smoke over Arizona yesterday (Sunday, August 2). Smoke from the fire remained over central Arizona all day, giving the sun an orange glow.Read full article >

Phoenix's First Possible Shot at Regional Haze since February

A strong low pressure system will result in windy conditions across the region, providing Phoenix with its next chance of regional dust transportRead full article >

Why less traffic doesn't necessarily mean less ozone

Traffic is only one part of the equationRead full article >

Unusually Low Ozone for March

Phoenix has benefitted from good ozone levels this March so far, thanks to active weatherRead full article >

2019: Phoenix Air Quality Year in Review

Here's a quick summary of Phoenix's air quality during 2019.Read full article >

Christmas 2019: Best Air Quality in Phoenix

Lowest PM-2.5 value in the past 10 years Read full article >

Hazy skies in Phoenix

New Mexico and Texas dust reach PhoenixRead full article >

As morning temperatures go down, air quality concerns go up

Strong inversions in the winter trap air pollution near the ground. What can you do to help? Read full article >

Monsoon 2019: Air Quality Recap

Here's a quick summary of Phoenix's air quality during the 2019 monsoon season.Read full article >

Phoenix AQ History: Dust Storm Causes Hazardous Air Quality

On August 2, 2018, a powerful dust storm rolled through the Phoenix area, causing the Valley to see its highest PM10 levels of the year.Read full article >

Hotter temperatures don't mean higher ozone

We typically associate Arizona's summers with hot temperatures. But ozone levels don't always follow temperature trends. Some of the year's highest ozone levels can occur when temperatures Read full article >

Phoenix: July 4th Impacts on Air Quality

Do fireworks have an impact on air quality in the Valley?Read full article >

The monsoon season is officially here on Saturday

The beginning of the monsoon season means that some of Arizona's most powerful weather phenomena are just around the corner.Read full article >

Yuma streak of no ozone exceedances coming to an end?

Yuma: First ozone exceedance in 356 days possibleRead full article >

May 22nd in Phoenix: Coolest in 100 years; best ozone on record?

Rare May weather pattern continues Read full article >

First Ozone Exceedance for Phoenix in 237 Days

Ozone exceeds the health standard for the first time in 2019, just shy of the record for latest first ozone exceedanceRead full article >

First time PM10 (dust) exceeds health standard in 2019

Pacific storm system causes first PM10 exceedance of 2019 and Valley-wide dustRead full article >