Lakes across the region are stepping up efforts to protect their water from the spread of golden mussels and that means new rules for boaters, but the rules vary by lake.

Since golden mussels were recently identified in the Sacramento-San Joaquin Delta, waterways in parts of Northern California and the Bay Area have introduced new rules for boaters.

The state cut in half the amount of water it is pulling from the Delta to send to cities and farms, citing environmental ...