Pinhole Leak Questionnaire

Thank you for contacting us about pinhole leaks in copper pipes. While no definitive cause has been determined, the WSSC is working with the Copper Development Association and the Washington Suburban Master Plumbers Association to try and isolate the factors that may be causing the leaks. We are confident our water is not causing the pinhole leaks. Our water quality consistently exceeds strict federal standards for quality -- including corrosion potential -- which is monitored by the Environmental Protection Agency. We regularly monitor and test our water for corrosion potential. If our water were corrosive, it would be dissolving the entire pipe -- which is not happening -- not just creating a pinhole leak.

If you have experienced pinhole leaks in your copper pipes, please take a moment at your convenience and fill out the attached questionnaire.

If you have submitted a complete or partial questionnaire already,






You will need the following information in order to complete your questionnaire:

  • WSSC Customer Account Number
  • Affected Property Address
  • Contact Information (name, telephone, email address)
  • Pinhole Leak Information (leak dates, frequency, location)
  • Copper Pipe Information (installation date, water temperature, pipe size and type)
  • Pipe Repair and Sample Information
WSSC Privacy Policy
Thank you for sharing your information with us. As an agency of the State of Maryland, WSSC is subject to disclosure of public records under the Maryland Public Information Act (State Gov't Art. Section 10-611 et seq.). Please note that the information you provide in this questionnaire is considered public information.
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