In Riverside, I used to leave the single-handle faucet lever centered for a quick rinse. If the stream never felt warm, I figured I had used only cold water. As of mid-September 2026, that still feels like the easy way to use the sink in my house. The trouble is that the temperature at the spout is not a reliable test of whether heated water is on its way.
That distinction matters here in California when a rinse is over almost as soon as it starts. Here in Riverside, the public utility recommends turning the faucet on only when rinsing during toothbrushing, handwashing or shaving. Riverside Public Utilities says doing so can save up to 2.5 gallons a minute. I can follow that water-saving advice and still pay attention to where I leave the lever: brief use is exactly when I might never feel warm water arrive.
Next stepIf you have no hot water, ask a plumber to find and fix the problem.Describe no hot water→Free · Your number stays private
What the California Energy Commission says
The California Energy Commission puts the timing plainly: “Since most hot water events are of very short duration, the water temperature rarely reaches steady-state.” A faucet can be shut off before the water coming out tells the whole story about what is moving through the pipes…