9. Can I use chlorinated water with my starter?

No. If you have chlorinated water, dechlorinate it first.  The quick
way is with a carbon filter.  You can also boil it or just let it sit
out uncovered 24 hrs, provided that your water treatment plant
chlorinates with free chlorine (as ~85% do), and not with the stable
form of chlorine, chloroamine.  This cannot be boiled or evaporated
out.

Dechlorinated water is not just some yogurt and granola health food
nut idea, it is very important for the health of your culture and the
success of your sourdough baking.  A microbiologist friend of mine
confirmed this observation with laboratory techniques.

-Jeff