The City of Boulder welcomes your feedback. Use our Inquire Boulder customer service tool to tell us what’s on your mind.

  • Boulder Water
  • Your Utility Bill
  • Flood Safety
  • Utilities Projects
  • Wastewater
  • Utilities Division Boards
  • Construction and Travel Impacts

Finding & Fixing Leaks


Did you know easy-to-fix water leaks account for nearly one trillion gallons of water wasted each year in U.S. homes? In fact, the average household leaks almost 10,000 gallons of water per year, or the amount of water it takes to wash 300 loads of laundry. In just 10 minutes, you can search your home for leaks and crack down on water waste. Many common household leaks are quick to find and easy to fix.

How to Find a Leak In the Home

  • Toilets: Listen for running water and conduct the food coloring test. Put a few drops of food coloring into the tank at the back of your toilet and let it sit for 10 minutes. If color shows up in the bowl, you have a leak.
  • Sinks: Look and listen for drips from the faucets or in the pipes under the sink.
  • Showerheads: Look for a dripping showerhead and replace with a new one, if needed.
  • Bathtub: Turn on the tub, then divert the water to the shower and see if there’s still a lot of water coming from the tub; that could mean the tub spout diverter needs replacing.
  • Sinks: Check for pooling water under pipes and rust around joints and edges.
  • Clothes washer or dishwasher: Look for pooling of water under pipe connections, rust or other signs of leakage.

How to Find a Leak Outside the Home

  • Spigot: Ensure tight connections with the hose and see if the hose washer need replacing.
  • Irrigation system: Check for broken sprinklers or nozzles spraying in the wrong direction.

The City of Boulder provides free irrigation consultations through Resource Central that can help you identify obvious leaks in your irrigation system. 

How to Fix a Leak

WaterSense Fix a Leak website has many helpful video links that show how to fix these simple leaks. If you cannot find a leak, or are having troubles fixing one, contact a certified plumber.