Putting something in my water?

My water has been really cloudy for months now. I've had the "water people" (whoever they are) out several times now to fix it. They keep saying they HAVE fixed it, but it remains cloudy.
I was very ill last week, my kid was sick and so was my fiancée. I thought it was a bug until my cat AND my dog also got sick! No bug passes from species to species does it? It must be the water because the cat and dog also drink it, so again I had them out to check it but they said the water is fine. It's like they refuse to accept something is wrong and it's driving me mad.
I'm starting to question my own sanity. I say something is wrong; they say its in my imagination!
Anyway I've started buying bottled water now and refuse to drink the water from my tap/faucet. I dunno why they don't fix it or accept that something is wrong...