Identify Your Service Line

The GCWW Lead Look-up Map provides information about both the public-side and private-side material of your water service line. Simply enter the address you want to look up, and the map will show you the material of your service line.

This information is based on the best-available data GCWW has at this time. GCWW continually updates its service line data based on current information and records it receives. You can help us improve the data by verifying your service line material on private property. If you have information related to your service line material that is not reflected correctly in our records, please contact us.

Instructions on how to do a scratch test to identify your service line material can be found below.

Self Identification of Lead Pipes

Your private water service line in your basement could be made of three different materials depending on the age of your plumbing fixtures: lead (left), copper (middle), galvanized steel (right).


Lead Pipe – If the scratched area is shiny and silver, your service line is lead. A magnet will not stick to a lead pipe.

Copper Pipe – If the scratched area is copper in color like a penny, your service line is copper. A magnet will not stick to a copper pipe.

Galvanized Steel Pipe – If the scratched area remains a dull gray, your service line is galvanized steel. A magnet will stick to this pipe.

Please complete the Self-Identification Form (form will open in a new window). Please select the material that the private portion of your service line is made of and upload a picture of your meter setting that we could use to help identify the pipe material. An example of a meter setting is shown below.