Pinhole Leaks in Copper Pipes

EXPLANATION OF COPPER PIPE PINHOLE LEAK DATA

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Most of this data is based on 4,850 reports from customers (out of 400,000 accounts) who have experienced copper pipe pinhole leaks. Although we continue to receive more reports, the data continues to show the same patterns and trends.

Orientation of Copper Pipe in House where Pinhole Leaks were Found

Frequency of Copper Pipe Pinhole Leaks by Pipe Diameter

Copper Pipe Service (Hot or Cold Water)
where Pinhole Leaks were Found

Copper Pipe Pinhole Leaks Reported by Community

Copper Pipe Pinhole Leaks Reported by Local Zip Code

Leaks per 1000 Customers

     Prince George's County          Montgomery County

As part of our copper pipe pinhole leak investigation, we are researching our clean & line water main maintenance activity to see if there are possible connections to reported pinhole leaks. Thus far, we have found that nearly 70 percent of the pinhole leaks reported to us are from areas that have not had mains cleaned & lined, or, just over 30 percent are from areas that have had this maintenance activity. Click on either County to view map, broken down by year, of clean & line activities and copper pipe pinhole leak reports.