PG&E will have to pay nearly one and a half billion dollars for the deadly gas pipeline explosion in San Bruno. California regulators slapped PG&E with the fine after the fiery disaster left eight people dead back in 2010.
The explosion and fire also destroyed 38 homes.
Investigators say PG&E was deficient in the managing its pipelines.
PG&E reps called the penalty "appropriate."
But the company could still face even more penalties if convicted of pending federal charges.