Nogales Median AQI 2021 Value | Official EPA Data & Context
AQI, PM2.5, and Live Environmental Data for Nogales, AZ
2021 search intent
Nogales air quality in 2021 — closest EPA context
People searching for Nogales's 2021 air quality want a fast EPA-backed answer. This page does not publish a single "median AQI" number, but it gives the closest available context: annual PM2.5 at 10.6 μg/m³, 7 unhealthy days per year, and the multi-year trend that shows whether 2021 reflected a cleaner or riskier pattern for Nogales.
🌍 Live Air Quality in Nogales
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Last 24 Hours: Nogales AQI Trend
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Regional Air Quality Context
Nogales is treated as a local community in AZ, so the most useful signal is the long-term pollution baseline rather than a single live AQI reading. Annual PM2.5 averages 10.6 ug/m3, with roughly 7 unhealthy-air days per year, and the multi-year trend is worsening. Its Clean Air Score is 45.1 (grade D), which helps compare Nogales with other AZ cities. This report uses direct city-level monitor coverage where available, so the trend is tied closely to conditions in Nogales.
Fine particulate matter (PM2.5) in Nogales is monitored for health safety. Long-term exposure to pollutants can lead to respiratory issues, making daily checks essential for active residents in AZ.
Indoor Air Quality in Nogales, AZ
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
Usually safe to open windows for fresh air.
Air purifier is optional for most households.
Normal indoor and outdoor activity is fine.
Ventilate selectively; sensitive groups should watch symptoms.
Run HEPA filtration on low if pollen, smoke smell, or traffic exhaust is noticeable.
Most people can continue normal activity; sensitive groups should keep an eye on AQI.
Keep windows closed so outdoor PM2.5 does not build indoors.
Run HEPA filtration in bedrooms and main living spaces.
Children, older adults, and people with asthma should reduce outdoor exertion.
Keep windows and doors sealed as much as practical.
Run filtration continuously; use the highest comfortable fan setting.
Stay indoors when possible and consider an N95 if you must go outside.
Health Recommendations
Most people can continue outdoor activities normally. Keep an eye on changing conditions.
Children and elderly should reduce prolonged or heavy outdoor exertion if AQI rises above 50.
Frequently Asked Questions about Nogales Air Quality
Is air quality in Nogales safe today?
Current air quality in Nogales is being monitored. Based on historical data, Nogales has a clean air score of 45.1. For real-time updates, check the live monitoring panel on this page.
What is a dangerous AQI level?
An AQI (Air Quality Index) above 100 is considered unhealthy for sensitive groups, while levels above 150 are unhealthy for everyone. Levels above 300 are hazardous.
Should I wear a mask today in Nogales?
If the AQI in Nogales is above 150, an N95 mask is recommended for outdoor activities to filter out fine particulate matter (PM2.5).