I use distilled water. San Diego's water, I won't even drink it myself. If I don't have distilled, I use filtered from the water store here since I drink it myself. Pretty cheap, $2 for 5 gallons.
Actually Steve, many many things in every state are known to cause cancer, but in California, state health laws require businesses post a sign anywhere where people many be exposed. For example, in california you will always find one of those signs in parking garages because car exaust is known to cause cancer. It's not our state that is cancerous!!!!!!!!!! Don't you wish your state told you when you are exposed to cancer causing agents?