to be honest, unless your water is so bad that people cannot drink it without getting harmed, it will work for plants. You don't need to worry about ph or chlorine or ammonia. With a soil grow, as long as the ph isn't way off no need to worry. Chlorine and ammonia in the amounts that are in the water are actually beneficial to plants. Don't sweat it. If you want to, buy distilled water or reverse osmosis water from your local grocery store, but it isn't "requireed" to grow this plant. If you were growing hydro, then I would worry a bit more about the water.
I agree completely. Just to be clear, my viewpoint is:
If you use tap water, I'd check the pH at least once just to make sure it's not at a crazy pH. My tap water is over 8.5 and I still use it (it just has a lot of calcium in it) - I just pH adjust it before mixing my nutrients (which means I have to test pH routinely). And if chlorine scares you, let the water sit out for a number of hours and no worries - it will be gone soon enough. If your water has chloramine in it instead of chlorine - still, don't sweat it. Just like with chlorine, it would take more than what is found in drinking water to harm a person or plant but don't bother trying to leave the water sitting out with it. Chloramine won't dissipate like chlorine. STILL, plants will either use the trace chlorine (it's an essential trace element for them) or the ammonia aspect of chloramine will eventually end up as nitrite or nitrate... which again, plants use.
If you use RO water, it is going to be near neutral pH (around 7) because it will not contain things like calcium to throw the pH off. But be prepared to additionally add Ca/Mg if needed for your plants... as most nutrient companies assume people are using tap water that already contains elements like Ca/Mg in sufficient amounts.
It's all just about practicing due diligence: Tap water = ensuring pH is sane. RO water = ensuring plants are receiving enough Ca/Mg.