Air Quality Alert: Phoenix, AZ Records Unhealthy PM10 Levels on March 17
Areazine synthesizes this EPA air-quality advisory directly from EPA's official public data feed. See our methodology for full source attribution and refresh cadence.
Air quality in Phoenix, AZ reached 'Unhealthy' levels on March 17, 2026, with PM10 recorded at an AQI of 153.
What this EPA air-quality advisory tells you, and what most readers miss
This notice was issued by EPA on April 3, 2026 and geographically references Phoenix, AZ. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Air Quality - determines the informational context it sits in, and which agency or body is the authoritative source for updates.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are air-quality, epa, aqi, Phoenix.
Current Air Quality
On March 17, 2026, the reporting area of Phoenix, AZ, recorded air quality levels reaching the "Unhealthy" category. The primary pollutant of concern is PM10, which reached an Air Quality Index (AQI) of 153. Other measured pollutants include PM2.5 at an AQI of 73 (Moderate) and Ozone (O3) at an AQI of 35 (Good).
What This Means
An AQI of 153 falls into the "Unhealthy" category. According to standard EPA guidance, at this level, everyone may begin to experience health effects, and members of sensitive groups may experience more serious health effects.
Who Should Take Precautions
While the general public may be affected, specific groups are at higher risk. These include children, older adults, and people with heart or lung disease, such as asthma.
What You Should Do
To reduce exposure, it is recommended that everyone reduce prolonged or heavy exertion outdoors. Members of sensitive groups should avoid prolonged or heavy exertion and consider moving activities indoors or rescheduling them to a time when air quality is better.
Source
Data provided by EPA AirNow.
Original source: EPA Official Notice ↗
Related Air Quality
All Air Quality →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this EPA air-quality advisory: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,118 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to April 3, 2026.
Frequently Asked Questions
Common questions about this EPA air-quality advisory.