Typically, if the water is good for drinking it's good for brewing. Boiling definitely doesn't hurt, but it's not completely necessary.
As for the siphon, before I got an autosiphon I would swish a shot of vodka around my mouth, then just suck start the siphon.
Welcome to the forum.
Knucklehead Brewery, Est. 2007
Always do sober what you do drunk. That will teach you to keep your mouth shut. -Ernest Hemingway