This declaration will allow state health officials to buy additional doses of the hepatitis A vaccine in order to combat the outbreak.
The hepatitis A outbreak began in San Diego's homeless community last year and has since spread outside the region.
581 people in California have been sickened, till now with the liver virus, out of which more than half of have ended up in the hospital.
Federal health officials last week said the California's outbreak could last years, even with so much of efforts being made.
"Vaccinating people at risk of exposure is the most effective tool we have to prevent the spread of hepatitis A," said California Department of Public Health Director Dr. Karen Smith.
Hepatitis A is commonly transmitted through contaminated food.
Hepatitis A is a little difficult to control because the disease can be spread through people before they have symptoms and even know that they have the virus. (ANI)