The Mono County Health Department provides environmental and public health services that support the health and safety of Mono County residents and visitors.

Please click on one of our programs to the left for more information, and some highlights are listed below.

If you are interested in receiving important health information such as MonoGrams, flu clinic schedules and community events, please sign up for Public Health Updates on the left side of this page and find us on Facebook [1]!

                          Subscribe to Monogram [2] 

Mono County Reports Third Fatality Due to Hantavirus

MONO COUNTY, Calif. (April 3, 2025) – Mono County Public Health has confirmed a third death [3] due to Hantavirus in the Town of Mammoth Lakes. Hantavirus is a serious and often fatal illness which people can get through contact with infected deer mouse droppings, urine, or saliva. Deer mice are widespread in the Eastern Sierra region. 

Hantavirus is endemic to Mono County and the surrounding region, commonly found in local deer mice. Human infection occurs through exposure to contaminated rodent droppings, urine, or saliva, typically when these materials become airborne and are inhaled. Person-to-person transmission does not occur.

For information on Hantavirus prevention, see here: Hantavirus [4]

Community Health Assessment & Improvement Plan 2024

• Mono County Public Health is pleased to present the findings of the 2024 Community Health Assessment (CHA).
• This CHA was completed in December 2024 and includes detailed information about Mono County’s current health status, needs, and priorities.
• If you'd like to participate in the Community Health Improvement Plan, please fill out this form here [5]
• View the completed 2024 CHA Report here [6]

For more information, visit the main webpage here: Community Health Assessment & Improvement Plan [7]