PurpleAir Blog

  • What are R2 values in Air Quality?

    Recognizing the benefits and challenges of having low-cost sensors widely available, South Coast AQMD is helping to assess the wide range of performance from these sensors through their AQ-SPEC program. Accurate sensors "significantly augment and improve current ambient air monitoring capabilities that now predominantly rely on more sophisticated and expensive fixed-site federal-reference monitoring devices and methods."
  • Wildfire Update – July 2022

    The NOAA reports that wildfires have burned over 3.9 million acres from January to June 2022, the second-highest amount on record. July continues the trend, from the blaze across Yosemite National Park in California to others hitting the USA. We review some of the headlines from July that have had the most significant impact on the environment and local air quality.
  • Community Spotlight: West Coast Calibration Factor Study

    Each time a PurpleAir sensor is installed, and air quality data is uploaded to the PurpleAir Map, the quality and reach of our community increases. In this post, we highlight the results from a scientific study and discuss what it means in the bigger picture. The network improves with each additional sensor, and studies like the one in this post are also part of the PurpleAir story.
  • Indoor vs Outdoor Air Quality – What’s the Difference?

    Since air is fluid, it can flow in and out of our homes, sometimes bringing pollutants with it. Thanks to the PurpleAir indoor and outdoor sensors, you can quickly compare air quality around you to make the best decision for your home or office. 
  • Fireworks Today – Can We Do Better?

    There's no doubt that large, night-sky-filled fireworks are dramatic and thrilling. From the immense splashes of colors streaking across the sky to the booms of massive explosions that send sparkles in all directions, fireworks have a unique place in people's hearts. For many, celebrations like 4th July just feel right if they're capped with dramatic fireworks that get the heart racing. But is that enough? Is the cost too high? Let's see if we can do better.
  • Why Does 'Particulate Matter' Matter?

    For nations in the Northern Hemisphere, we can expect July and August to be the hottest and driest months. Fire danger warnings increase and vast areas become vulnerable to wildfires. This can mean heavy smoke and smog, and here are three reports we should remember as we plan our activities.
  • Summer is Here – Be Prepared

    Summer’s the time for sun, time off, and playing outside. Summer is also the season when temperatures rise, drought conditions increase, and large wildfires make the news. Especially across Western US states, the warmer weather can open the landscape to wildfire risks. Make sure you know what’s happening with your air quality – at home and beyond. 


  • PurpleAir Study Showcase: PurpleAir Sensors Used in Environmental Disparity Study Across US

    This study references real-time PurpleAir sensors to examine how air quality impacts different communities differently. Specifically, the study compares regions characterized according to different ethnicities and races. 
  • Understanding Air Quality: PurpleAir Empowers Community Science

    In this article, we share our in-house rules to guide our editorial decisions. From academic research to work from local communities and governments, we aim to follow and share research projects and Community science initiatives. These studies use PurpleAir sensors to understand air quality impacts through local air quality data.
  • Wildfire Season: Emergency Action Plan Checklist

    Every year the world experiences wildfires, and it is always a good idea to have a clear action plan. Be prepared in case unexpected situations arise by following this checklist.
  • Urban Trees That Help Reduce Air Pollution

    Since the industrial revolution, cities worldwide have undergone an extensive and neverending transformation. Creating more residential areas, bus...
  • Cooking and Cleaning Generate More Indoor Pollution Than You Think

    The World Health Organization stated that 3.8 million people die from exposure to pollution generated in their homes every year. It is impressive that indoor air is not receiving the necessary attention, considering that people spend 90% of their time inside. The most common indoor air pollution source is cooking, especially when roasting and frying.