The charges, filed by the U.S. Attorney's Office, state that PG&E knowingly and willfully broke the Pipeline Safety Act from 2003 to 2010.
PG&E said in a statement that its employees did not intentionally break the law. The utility company is attempting to reach a settlement with the U.S. Attorney's Office.
The California Public Utilities Commission proposed fine of about $2.25 billion, according to Reuters. The company has also settled claims amounting to nearly $500 million with the affected victims and families.