This may be a no-brainer question, but so far I haven't figured it out. Since I winterized myself (compressed air method), I'd like to test everything out before our first trip. Problem is, I'm not...
At our place, and I believe it is state regulated, any faucets connected to the house is potable water (either public supply or private well water). Our irrigation Faucets in the pastures are untreated canal water. We have had our well water tested several times and the results have shown it to be better than any locally available public water systems.