A slow drip can waste up to 15 to 20 gallons per year. Put a bit of food coloring in each toilet tank. Without flushing, watch for a few minutes to see if the color shows up in the bowl. It is not uncommon to lose up to 100 gallons per day from one of these otherwise invisible toilet leaks. That can add up to over 30,000 gallons per year.
Showers use less water than baths.
On average, a bath requires 23 gallons of water while a shower requires only 12 gallons. Save more water by turning off the shower to soap up. Also water conserving shower heads may be available at home and hardware stores. However, if you enjoy baths, only fill the tub with 5 inches of water. If you enjoy showers, try to limit your showers to five minutes.