Erin Brockovich in Drunk Boating Bust

Erin Brockovich says a day of sun led to her weekend arrest for boating while intoxicated. The environmental activist—whose legal battle over pollution in a California town became a movie starring Julia Roberts—was arrested and breath-tested after a game warden at Lake Mead, Nevada, saw that she was having a hard time mooring her boat on Friday night, the AP reports.

Brockovich, who was released on $1,000 bail, says she's sorry for her actions, but stresses that she was moving the boat at the dock, not operating it in open waters. "At no time was the boat away from the dock and there was no public safety risk," she said in a statement. "That being said, I take drunk driving very seriously, this was clearly a big mistake, I know better, and I am very sorry. After a day in the sun and with nothing to eat it appears that a couple of drinks had a greater impact than I had realized." See her mugshot here. (More Erin Brockovich stories.)