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Pressure Zone Improvement Program (PZIP) 4th High

Project Update

DC Water has completed its Pressure Zone Improvement Program (PZIP) for the 4th High West Service Area, and the planned increase in water pressure for some Ward 3 and Ward 4 homes and businesses is set for early November. In recent years, there has been great community concern regarding low water pressure in sections of Wards 3 and 4.  To address these concerns, DC Water made improvements to its Fort Reno Pumping Station, located in Northwest DC.  The upgrades are now complete, and there will be an 11 pound per square inch (psi) increase in water pressure to area homes and businesses.  This program will ensure improved water pressure and provide increased fire protection for all customers across the service area.

The increase in water pressure will begin on Monday, November 6, 2017 and be done slowly until the total 11 pounds per square inch (psi) increase is reached the week of November 13.  

Following implementation of the pressure increase, some homes may experience pressure exceeding 80 psi, which is regarded as high water pressure. Per the District of Columbia Plumbing Code, all homes with high water pressure are required to have a pressure reducing valve (PRV) installed. If your home was identified as one that will experience pressure higher than 80 psi as a result of the 11 psi increase and you have not had a PRV installed, a PRV must be installed now at your residence and at your own cost to be in compliance with the District of Columbia Plumbing Code.  We recommend you consult a licensed plumber to install your PRV. 

For all customers whose homes will experience an increase in water pressure, DC Water recommends that you take steps to prepare your home for the upcoming pressure increase. Please ensure that your household plumbing is in proper working order. One way to do this is by checking all plumbing fixtures to ensure they are tightened. This general information is being provided as a cautionary measure, as the possible introduction of increased water pressure to any home plumbing system could result in some leakage from pipes and faucets that are not in good condition or tightened securely. Should you have additional questions or require assistance in checking your plumbing system, DC Water suggests that you consult a licensed plumber.

Should you experience discolored water or any other water quality issue, please call our Drinking Water Division at 202-612-3440.

If you have any questions about the project, call DC Water at (202) 787‑7659 (weekdays, from 8:00 AM to 4:00 PM) or send an email to

Project Facts

  • The Fort Reno Pumping Station Rehabilitation Project will result in an 11 psi water pressure increase for identified properties across the 4th High Water Service Area.
  • All customers within the heavy dotted area in the above ANC Boundary Map will experience the pressure increase.
  • Some of the properties will experience water pressure greater than 80 psi.
  • When water pressures are equal to or greater than 80 psi, more commonly referred to as high water pressure, the DC Plumbing Code requires the installation of a Pressure Reducing Valve (PRV).
  • DC Water notified all impacted customers who will need to have a PRV.
  • DC Water also provided general information to all customers who will be impacted by the water pressure increase.

Is my property within the PZIP Area?

Click the map to see if you fall
in the PZIP 4th High area