I never use water from a faucet for my film processing. I always have a few gallons of distilled or purified water sitting on my kitchen counter, along with my developer, stop bath, fixer and HCA. I keep the temperature in the room at around 68 degrees, and after I mix the D-76 1:1 with water, and it's at the right temp, I start the process. I use the distilled water for the wash, and everything should be close to 68 F.