Chester County Water Resources Authority


Chester County Water Resources Authority is open to the public and will continue to provide all services and programs, though there will be times when our staff will be working remotely. Therefore, we encourage you to look for answers to your questions and concerns online, or send us an email at [email protected]. Should an in-person meeting be required, we urge you to contact us by phone (610-344-5400) or email to schedule an appointment. We will respond as soon as possible.

Chester County Commissioners' Adopt 2022 County-wide Stormwater Management Model Ordinance

On August 17, 2022, the Chester County Board of Commissioners adopted a resolution to amend the County-wide Act 167 Stormwater Management Plan for Chester County, PA to replace the 2013 model ordinance with the recently completed 2022 County-wide Act 167 Stormwater Management Model Ordinance. The updated Model Ordinance, summary of changes table, Matrix of Minimum Mandatory Standards, and other resources are available at Any questions about the updated Model Ordinance  can be submitted to [email protected]

Municipalities with MS4 permits should plan to update their ordinance to be consistent with the updated County-wide Model Ordinance by September 30, 2022. The adopted Model Ordinance has been submitted to PA DEP for their final review and approval in accordance with PA Act 167. A letter will be sent to municipalities once PA DEP's final review has been completed. 

To assist municipalities with updating their stormwater ordinances, CCWRA hosted two implementation workshops in May. 

  • The first workshop was held on May 6. Presentations and a recording of the event can be found at this link.
  • The second workshop was held for May 24 from 1:00 to 3:00 PM. You can register to attend this workshop in-person here and to attend virtually via Zoom here. 

Our Programs

Water Resources Plans and Updates Underway

To ensure that our residents and businesses are equipped to respond to evolving water resources needs, Chester County is leading updates to the Watersheds Plan and the County-wide Stormwater Management Plan.

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Water Quality in Chester County

Clean water in our groundwater aquifers, streams and lakes is critical to long-term healthy communities.  Learn about PADEP's assessment program, resources from MS4 municipalities, and information about TMDL pollution reduction programs.

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Flooding and Stormwater Reduction

CCWRA provides information on FEMA floodplains as well as real time stream flood monitoring through a partnership with USGS. The Authority also provides flood protection in the Brandywine Creek watershed through the operation of four flood control dams, and has information on preparing for flooding emergencies.

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Maps, Reports and Data

Find both interactive and print-ready maps on water quality conditions, floodplains, and other key water resources components, as well as reports on water conditions in the County, and various factsheets.

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Get Involved Local Watershed Groups

Chester County is fortunate to have watershed and conservation organizations that are active with on-the-ground improvement projects, outreach and community education.

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Sustainable Water Supply Management

CCWRA assists with sustainable water management by providing reservoir water supplies, through planned and managed water releases from Chambers Lake Reservoir. Learn about our reservoir management as well as water conservation tips.

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