Chester County Water Resources Authority

Due to Governor Wolf's "Stay at Home" order to help slow the spread of coronavirus throughout the region, our office is currently closed. Many of our staff are working from home to continue to provide some services and to answer questions emailed to us. If you are not able to complete your business online or find answers to your questions, please send us an email at, and someone will respond.

We appreciate your patience and understanding at this time. Please stay healthy, stay safe and stay home to help slow the spread of coronavirus.

What We Do


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

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