Water is an essential resource for life and civilization. However, water resources are limited so conservation is important for current and future generations. Some ways to conserve water include taking shorter showers, running full dishwasher and washing machine loads, and fixing leaks. Installing water efficient plumbing fixtures and appliances can significantly reduce water usage. New York City gets its water from three watersheds and transports it through aqueducts, tunnels, and pipes before treating wastewater and returning it to waterways. Combined sewer overflows negatively impact the environment during heavy rain or snow.