I've seen this asked in a few places but I haven't seen a good answer. I use local tap water for my beers, I've never treated it in any way. But I have noticed that my darker beers are much better than the paler brews. I simply have no inclination to bother my local water department for a detailed report and the details on-line are not helpful for brewing purposes. So... Are there any SIMPLE general guidelines/recipes that one can use to brew different styles when starting from a known point such as DI or RO water? C'mon water geeks, since I'm brewing all styles from a municipal source there must be a good bit of leeway! TBH, I surprised there aren't recipes that start with RO water and a list of salts/water additions along with the grain and hop bill. Now THAT would be useful.