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Region 9: Children's Environmental Health in the Pacific Southwest

EPA Region 9 (Pacific Southwest) serves Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal Nations.


Western States Pediatric Environmental Health Specialty Unit

EPA and the Agency for Toxic Substances and Disease Registry (ATSDR) jointly support the Pediatric Environmental Health Specialty Units (PEHSUs), which is a network of experts in pediatric environmental health located throughout North America. PEHSUs were created to ensure that health professionals and communities have access to specialized medical knowledge and resources for children faced with a health risk due to a natural or human-made environmental hazard. 

The Western States Pediatric Environmental Health Specialty Unit is available to answer questions from healthcare professionals, parents, care givers, and others about children's symptoms that may be related to environmental exposures. 

  • Service Area: Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations
  • Email: pehsu@ucsf.edu
  • Phone: (415) 206-4083, or toll-free at 1 (866) 827-3478 

Recorded Events

  • October 2022: The Community Development Institute (CDI) (EPA Region 9 grantee) provided a virtual training session about the importance of environmental and facility health in early care and education. In the training, CDI shares useful assessment tools that help to identify potential facility concerns, increase awareness of environmental exposures, and address identified concerns. 
    Learn more about CDI.
  • October 2022: EPA Region 9 presented at a Tribal Conference in Lake Tahoe, NV on Practical Indoor Air Quality Monitoring, Filtration, and Ventilation.
  • October 2021: EPA Region 9 presented at Tribal Conference Sessions on topics including Wildfires and Smoke-Ready Communities, EPA Tribal Lead Curriculum, and School Air Quality for COVID-19 and Beyond.
  • October 2020: EPA Region 9 hosted a webinar, Ask the Experts: Wildfire Smoke, Mental Health and Green Cleaning-Sanitizing-Disinfecting, in English and Spanish.
  • October 2020: EPA Region 9 presented at a Tribal Conference on the topic, Children's Environmental Health and Environmental Education Session.

Resource Highlights

  • New Western States PEHSU resources are available on Indoor Air Quality and cooking (in English and Spanish) and green cleaning, sanitizing, and disinfecting for early care and education (in English, Spanish, Tagalog, and Samoan).
  • View the Children's Environmental Health Whiteboard video, developed in 2022.
  • View EPA Region 9 Wildfire Videos on AirNow, developed in 2020 and 2021. These four videos are available in English and Spanish.

Social Media

You can also keep up with children's health highlights by following us on social media.

  • X: @EPARegion9
  • Facebook: U.S. EPA Pacific Southwest
  • Instagram: @EPA_PacificSouthwest

Children's Health

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Contact Us about Children's Health
Contact Us about Children's Health to ask a question, provide feedback, or report a problem.
Last updated on July 14, 2026
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