Chester County Water Resources Authority


Chester County is currently in the Commonwealth of Pennsylvania's "green phase" as a result of the COVID-19 pandemic. Chester County Water Resources Authority is providing services and programs while most of our staff continue to work from home. We encourage you to look for answers to your questions and concerns online, or send us an email at Visitors will be seen by appointment only. To schedule an appointment, please contact us by email or call 610-344-5400 to leave a message, and we will respond as soon as possible.

We appreciate your patience and understanding during this time.  Please continue to follow all CDC and PA Department of Health guidelines to help control the spread of COVID-19 during the green phase.  A reminder of the guidelines to be followed during the green phase are found at  

What We Do


  • flood protection
  • reservoir water supplies
  • water science, information and planning 
  • stormwater management planning
Today's Water Levels

Hibernia Dam Rehabilitation Project

Chester County Water Resources Authority and
USDA Natural Resources Conservation Service
are undertaking improvements to the Hibernia
Regional Flood Control Dam located at Hibernia
County Park. The work will involve construction
activities beginning June 8 and anticipated to be completed by October 6.

For more information, please visit the project web page.
Hibernia Dam and Chambers Lake, 
Hibernia County Park

Beaver Creek Dam Rehabilitation Project

Chester County Water Resources Authority and
USDA Natural Resources Conservation Service
are also undertaking improvements to the Beaver
Creek Flood Control Dam located in
East Brandywine Township. Additional information
is posted on the project page.

CCWRA will be holding a public informational
open house
on Wednesday 7/22/20
from 6:00 pm – 8:00 pm at the
East Brandywine Township building.
This will include a series of informational 
displays that attendees can view. 
CCWRA staff be available to answer questions.
Beaver Creek Dam

New Publications

  2018 Annual Report_Web Chester County Water Conditions
January 2018 - June 2019

Water resources throughout Chester County rebounded from
drought levels in January 2018 to near record highs in the fall
of 2018. This 24-page report summarizes water conditions
from January 2018 through June 2019, including rainfall,
groundwater levels, stream flows, biotic diversity, nitrogen,
phosphorus, chloride and public water use.

  Impaired Waters of Chester County 2018 Assessed Waters Map Series 
(based on the PADEP 2018 Water Quality Report)

Map Series, Overview Memo and Materials Specific
to Chester County and Its Watersheds

CCWRA has prepared resources specific to Chester County,
including interactive maps where you can search and print
custom maps, a series of published maps that illustrate
different causes, an overview memo, GIS files, and links
to background information and the PADEP report.

Updating Chester County’s Water Plans

To ensure that all county residents are equipped with the information they need to respond to evolving water resources needs, the Chester County Water Resources Authority (CCWRA)
is preparing to review and update the Watersheds integrated water resources plan and the
County-wide Act 167 Stormwater Management Plan to ensure that these documents continue
to provide timely and relevant guidance on current and future water resources issues

Learn about the planning process for updating Watersheds and the County-wide Act 167 Stormwater Management Plan here.

The Model Ordinance Amendment for Act 15 "High Tunnels" exemption is here.

Water Conditions and Water Quality Reports
From the water we drink to the streams, lakes, and rivers in which we play, the conditions of Chester County’s water resources impact the lives of every resident. Monitoring of water quality allows us to evaluate progress and whether or not we are maintaining or improving water resources.

These reports include
  • Chester County Water Conditions January 2018 - June 2019;
  • 2018 Assessed Waters Map Series and Overview Memo;
  • Chloride Fact Sheet;
  • Water Quality Data Report: 1998 - 2017; and
  • Water Quality Data Summaries for the 18 Monitoring Stations: 1998 - 2017.

2019 Municipal Stormwater Summit

Links to the information and presentations given at the recent Stormwater Summit highlighting changing trends in growth, rainfall patterns, and stormwater in Chester County.

Things to Know


What is a Watershed - and How Does it Work?

Understanding what a watershed is and how it works is the first step to clean water for our communities and our environment. Find out more. 

Current Water Conditions

A set of color graphs and maps presents a visual snapshot of current rainfall amounts, groundwater levels and streamflow conditions for Chester County.

Streams and Lakes of Chester County

You can find out  information about the streams and lakes in Chester County through interactive maps, an overview summary, and more

Chester County Municipalities

Stormwater management and water resources information available to assist local municipalities

Things to Do


Upcoming Events

Check back in the new year for upcoming events.

Join a Watershed Conservation Organization

There are many local Water Conservation groups. Get involved with one that protects your local watershed.

Help at Various Clean-up Events throughout our Watersheds

Find an event via Keep Pennsylvania Beautiful website. Also check with your local watershed association or municipality. 

Participate in the Volunteer Rainfall Observer Network

Volunteer to keep a daily log of rain gauge readings and submit the log on a monthly basis. 

Right-To-Know Information

Chester County Water Resources Authority's Right-To-Know information