Residents will be limited to turning on the sprinklers twice a week unless it is a drip system.
Pools will need covers to keep the water from evaporating.
California Dreaming: Farmers, scientists sustainably getting by with less water
The board's vote Tuesday night was unanimous. These measures take effect immediately.
There already are restrictions on washing cars and power washing driveways and sidewalks.
Related stories and videos:
- 85% of CA is in severe, extreme, or exceptional drought, latest numbers show
- Here's how far Sonoma County is going to fight the drought
- Petaluma cattle ranchers brace for 'worst drought ever' as rainwater runs dry
- Millions of South Bay residents being asked to cutback, conserve water
- Sierra foothill wildflower super bloom of lupine brings ominous warning for low lake levels