Wednesday 22 May 2019

Our Waterkeepers are experts on their local waterways. They monitor water quality in several different ways. Some are indirect by reviewing pollution reports required under Clean Water Act permits or analyzing government sponsored data collection. Waterkeepers also monitor water quality directly by conducting robust water sampling and then analyze and report their results in annual report card reports, interactive maps and mobile apps.

Our Waterkeepers that publish annual or biannual report cards include:


In addition to Report Cards, several of our Waterkeepers report water quality data on the Swim Guide app:

  • Assateague Coastkeeper
  • West-Rhode Riverkeeper
  • South Riverkeeper
  • James Riverkeeper
  • Anacostia Riverkeeper
  • ShoreRivers
  • Shenandoah Riverkeeper
  • Potomac Riverkeeper (coming soon!)


Blue Water Baltimore measures and maps water quality on the Patapsco and its tributaries and posts it on its interactive Baltimore Harber Water Alert map. The South River Federation rolled out an interactive data map in 2018. It takes a look at whether the river is fishable and swimmable and includes historical data. The data map also provides photos and information about where restoration projects are located. View the data map at James Riverkeeper also has an interactive map on current James River water quality at