Agents say there may be enough heroin for the entire city of San Jose to get "loaded"
Herrera, 27, is a native of Mexico and a known associate of the Sac Street Gang, a violent East Palo Alto street gang with ties to Mexican drug-trafficking organizations.
Special Agent in Charge of the Bureau of Narcotic Enforcement's San Jose office, Bob Cooke, tells NBC Bay Area this is more proof the Mexican drug cartels are very active in the Bay Area.
But his office is in danger of closing shop due to the state's fiscal crisis.
San Benito County Sheriff, Curtis Hill, recently told NBC BayArea, the move "would be a devastating loss to public safety in California. It will enhance and embolden the criminal enterprise, the greed and the profits ...coming up out of the Mexican drug cartels."
Authorities say Herrera has prior arrests for domestic abuse, kidnapping and providing false information to a police officer.
The amount of narcotics has a street value of $7 million, making it the largest seizure of heroin ever made in San Mateo County.
Herrera was arrested and booked into the Santa Clara County Jail for possession of heroin for sale and for possession of a hidden compartment.
His bail has been set at $5 million.