Idaho local data guide

Air Quality Index in Boise, ID (September 15, 2026)

As of September 15, 2026, the air quality in Boise is categorized as "Good," with an Air Quality Index (AQI) of 44. Conditions are favorable, and there are currently no restrictions on outdoor burning or residential wood heating in the area.

Updated with grounded research as of 2026-09-15.

The short answer

On September 15, 2026, the Idaho Department of Environmental Quality reports that the air quality in Boise remains in the 'Good' category with an Air Quality Index (AQI) of 44. This level indicates that air quality is satisfactory and poses little or no risk for outdoor activities for the general population.

Key facts

Current Air Quality Index (AQI)
44 (Good)
Date of Data
September 15, 2026
Regulatory Restrictions
None currently in effect

Understanding the 'Good' Category

An AQI reading of 44 falls squarely within the 'Good' range (0-50). In this category, air pollution poses little or no risk to public health. Residents can comfortably pursue outdoor activities without taking special precautions.

Current Regulatory Status

The Idaho Department of Environmental Quality (DEQ) monitors air quality to determine if voluntary or mandatory restrictions are necessary for burning or wood stove usage. As of today, conditions are stable, and there are no active restrictions on outdoor burning or residential wood heating within the Boise area.

Factors Influencing Boise's Air Quality

While today's air quality is favorable, Boise's air shed is susceptible to change. Several factors can influence readings throughout the day:

  • Wildfire smoke: Seasonal wildfire activity, even from distant fires, can cause rapid fluctuations in AQI levels.
  • Traffic patterns: High-density transit times can lead to localized increases in pollutants.
  • Temperature inversions: During certain times of the year, atmospheric conditions can trap pollutants near the valley floor.

Common questions

What are the Idaho DEQ air quality categories?

The AQI is divided into six color-coded categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), and Hazardous (301+).

How does wildfire smoke affect Boise's air quality?

Wildfire smoke can significantly degrade air quality, often causing sudden spikes in particulate matter (PM2.5) that may reach 'Unhealthy' levels, regardless of typical seasonal conditions.

Where can I find real-time updates for Boise air quality?

You can monitor live data, forecasts, and health advisories directly through the official Idaho Department of Environmental Quality website.

Related Idaho questions

  • What are the Idaho DEQ air quality categories?
  • How does wildfire smoke affect Boise's air quality?
  • Where can I find real-time updates for Boise air quality?

Sources and verification