One option is to conserve water within your home. This can be as simple as not running the water constantly when washing the dishes or brushing your teeth. Another option would be to water your plants/lawn less often. You can often save water by checking for and dealing with leaks by using a licensed plumber.
One simple leak checking option is to use die strips or tablets in your toilet tank (do not flush) and wait to see (maybe 10 minutes) if the color migrates into your bowl on its own. Die strips are available for free at the Village Hall, or you standard food coloring can be used instead. You can also find helpful tips in the Village's Water Leak Flyer here.