Indoor air and radon monitors available for residents to check out

Published on July 27, 2026

Air quality monitor on a wall near a desk.

Curious about the air quality inside your home? Commerce City residents now have a free, easy way to learn more. As of Monday, July 27, residents can borrow indoor air quality monitors and radon sensors from the Anythink Commerce City Library (7185 Monaco St.) through the city's new Indoor Air Sensor Loan Program. The program helps residents better understand their indoor environment and provides practical information on improving air quality at home. 

Residents can check out one of two handheld devices, there is a handful of each available. The Temptop M10+ Air Quality Monitor is an easy-to-use monitor that provides real-time readings for PM2.5 (fine particulate matter), Total Volatile Organic Compounds (TVOCs), Carbon Dioxide (CO₂), and overall Air Quality Index (AQI). Separately, the SAF Aranet Radon Detector continuously measures radon levels (every 10 minutes), temperature, relative humidity and atmospheric pressure. Each device uses simple color indicators to help interpret readings. Green means good, yellow means moderate, and red means poor. Once residents receive their results, they are encouraged to visit Energy, Equity, and the Environment Division page and click “Indoor Air Sensor Loan Program” under “Programs” to understand what each measurement means and learn simple actions you can take if elevated levels are detected.   

Many people spend most of their time indoors, where pollutants can build up from everyday activities like cooking, cleaning, burning candles, or using certain household products. Monitoring indoor air quality can help identify opportunities to improve ventilation, reduce exposure to pollutants, and create a healthier living environment. 

Stop by the Anythink Commerce City Library to borrow a monitor and start learning more about the air inside your home. Visit c3gov.com/E3 to interpret your readings, recommendations for improving indoor air quality, and additional resources, including information on free radon test kits and mitigation assistance programs.