The University of California San Francisco Pediatric Environmental Health Specialty Unit (UCSF PEHSU) is one of several regional federally funded clinical and educational centers. We provide expert clinical and public health evaluations of children and communities with suspected environmental health problems. In addition, PEHSUs are a source of medical information and advice on environmental conditions that influence children’s health. PEHSUs are academically based, typically at university medical centers, and are located across the United States, Canada, and Mexico. These PEHSUs form a network that is capable of responding to requests for information throughout North America and offering advice on prevention, diagnosis, management, and treatment of environmentally-related health effects in children.

We have two clinical sites, the University of California, San Francisco and the University of California, Irvine, and serve the geographic area that encompasses Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations.

PEHSUs are administered by The Association of Occupational and Environmental Clinics (AOEC). More information on the PEHSU national program can be found here: http://aoec.org/pehsu.

Read our 2013 Pediatric Environmental Health Speciality Units (PEHSU) Factsheet (pdf).

The Western States Pediatric Environmental Health Specialty Unit is supported by the American College of Medical Toxicology (ACMT) and funded (in part) by the cooperative agreement FAIN: U61TS000238 from the Agency for Toxic Substances and Disease Registry (ATSDR).

Acknowledgement: The U.S. Environmental Protection Agency (EPA) supports the PEHSU by providing partial funding to ATSDR under Inter-Agency Agreement number DW-75-92301301. Neither EPA nor ATSDR endorse the purchase of any commercial products or services mentioned in PEHSU publications.

The contents of this site are for informational purposes only. No content is intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health care professional with any questions you may have regarding any medical condition. Never disregard or delay in seeking medical advice based upon something that you have read on this site. If you think you may have a medical emergency, call 911 or a qualified health care professional. Reliance on any information provided on this site is solely at your own risk.

Our Team

Our team includes Pediatricians, Pediatric Clinical Toxicologists, Occupational & Environmental Medicine Physicians, Nurses and Industrial Hygienists and Public Health experts.

Mark Miller MD, MPH
Director of UCSF PEHSU Program,
Assistant Clinical Professor, Pediatrics

John Balmes, MD
Chief of the UCSF Division of Occupational & Environmental Medicine

Mary Burke, MD
Community Champion
Pediatric Mental Health and the Environment

Timur S. Durrani, MD, MPH, MBA
Associate Director, UCSF PEHSU Clinical Services Program
Assistant Clinical Professor, UCSF

Vickie Leonard, RN, FNP, PhD
PEHSU Program Coordinator

Kent Olson, MD, FACEP, FACMT
Medical Director of the California Poison Control System, San Francisco Division
Clinical Professor, Medicine & Pharmacy

Patricia Quilan, CIH, MPH
Occupational and Environmental Health Specialist
UCSF Division of Occupational & Environmental Medicine

Marya Zlatnik, MD
Associate Director, Maternal Fetal Health and the Environment Program
Clinical Professor of Obstetrics, Gynecology, & Reproductive Sciences

Our Partners

UC PEHSU is funded by the US Agency for Toxic Substances Disease Registry and the US Environmental Protection Agency. Funds are administered through the Association of Occupational and Environmental Clinics.

*The PEHSU work with CIRCLE is supported by NIEHS grant 1P01ES018172 and US EPA grant RD83451101 for the Center for Integrative Research on Childhood Leukemia and the Environment at the University of California, Berkeley, Catherine Metayer PI.

National Pediatric Environmental Health Specialty Unit Network - Mission, Vision, and Values Statement

Mission: Improve the environmental health of children by

  • Enhancing educational and consultative services to clinicians, health professionals, and the community.
  • Providing evidence-based information from a network of experts in environmental health.

Vision: The PEHSU network is the globally recognized go to resource for pediatric environmental health expertise for clinicians, health professionals, and communities.


  • High quality
  • Reliable
  • Professional
  • Integrity
  • Ethical
  • Respect
  • Objectivity
  • Beneficence