A low-flow showerhead can save the average family around 2,700 gallons of water a year without making showers noticeably weaker.
Pick a model with a good spray pattern, since modern low-flow heads are designed to feel full despite using less water.
Install it with basic tools in minutes, since most simply thread onto the existing pipe.
Pair it with shorter showers and you compound the savings, cutting both the water bill and the energy used to heat it.
It is a one-time fix that keeps saving water for years to come.