Household water usage increases significantly over the summer months with an estimated 30-70% of water being used outdoors according to the EPA. Consider purchasing a rainwater catchment barrel to curb your outdoor water usage and save money on your water bill.
It's also estimated that 50% of water is wasted through evaporation due to poor watering practices. In order to reduce evaporation, avoid watering your garden during the heat of the day. Generally, early morning or late afternoon are the best times.
Lastly, consider upgrading your toilets and fixtures to newer low flow options to save money on your water bill and reduce your overall usage.