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Ozone Where We Live (OWWL)

California’s San Joaquin Valley, home to more than four million people, has some of the most polluted air in the United States. The Ozone Where We Live (OWWL) project partners with the Central California Asthma Collaborative (CCAC), the Civil Air Patrol, the Root Access Hackerspace of Fresno, and San Joaquin valley residents to measure this pollution. Participants deploy and use low-cost ground- and air-based sensors. The project shares data with residents via the CCAC SJVAir online map and helps scientists predict pollution events for the community. The OWWL team will compare their data to data from NASA’s Tropospheric Emissions: Monitoring of Pollution (TEMPO) satellite.

Are you a middle or high school teacher in the area? Sign up to host a ground station with your students! 

Are you a pilot? Sign up to deploy a hand-held sensor during your flights over the area.

Go to Project Website about Ozone Where We Live (OWWL)

ages

Age 18 and up; middle and high school classes

division

Earth Science

where

San Joaquin Valley, CA, Outside

launched

2025

A hand holds a grey control box with plugged in components with the words “Personal Ozone Monitor” on its front. In the background is a small fixed-wing aircraft.
Handheld airborne ozone sensor you’ll use as a pilot when you participate in OWWL.
Credit: Emma Yates

What you’ll do

  • Pilots: Sign up for a training, deploy one of our 1-lb hand-held sensors during your flight, and submit the data collected during your flights.
  • Ground station hosts: Sign up for a training; install a sensor on your property or, with permission, a nearby library or school. Stand by to deal with occasional maintenance.
  • Everyone: Join free educational events to learn more about ozone, data, and air quality.

Requirements

  • Time: <1 hour for initial training; 30-minutes to set up a ground station; pre-flight, 2 minutes to set up handheld device. Post flight, connect sensor battery to a charger (and leave to charge) and email the data (5 mins).
  • Equipment: Air: access to an aircraft (yours or one you use). Ground: secure open air location & power outlet.
  • Knowledge: None. Project trainings will provide all the information required.

Get started!

  1. Visit the project website.  
  2. Send an email with the subject line, “I want to volunteer with OWWL” to emma.l.yates@nasa.gov. You will receive a reply in 2-3 business days with additional information and next steps.
The Ozone Where We Live project logo, which shows a sunlit multi-story building with a small aircraft flying over it leaving a yellow contrail in a blue sky. In white letters on a blue field circling the image are the words “OWWL Ozone Where We Live.”
Ozone Where We Live (OWWL)
View from the top of a tall building of other buildings and rooftops under a blue sky. A plastic weather proof case with foil tape on its top is attached to a railing. This is the sensor deployed by the OWWL program. Next to it, a cylindrical sensor stands up from a base affixed to the same railing.
Small low-cost gas monitor from the OWWL program on a rooftop at San Jose State University
Credit: Emma Yates

Learn More

Visit the project website to learn about the formation of smog, the goals of the OWWL project, and how the project scientists will use data collected and contributed by volunteers.

All collected project data will be available to the public via the San Jose Valley Air (SJAir) website and mobile app. The website and app are run by one of the OWWL project’s partners, the Central California Asthma Collaborative.

Get to know the people of OWWL!

Portrait photo of Emma Yates

Emma Yates

Principal Investigator, Research Scientist (instrumentation and data)

Portrait photo of Laura Iraci

Laura Iraci

Co-Investigator, Research Scientist (instrumentation and data)

Portrait photo of Kristen Okorn

Kristin Okorn

Co-Investigator, Research Scientist (Instrumentation and data)

Portrait photo of Matthew Johnson

Matthew Johnson

Co-Investigator, Research Scientist (air quality monitoring and NASA TEMPO science team member)

Portrait photo of Claudia Bernier

Claudia Bernier

Co-Investigator, Research Scientist (air quality monitoring)