Water Quality Monitoring Resources

Athena assisting her grandfather Don Gower with his water quality monitoring.

Thank you for volunteering with Friends of Casco Bay! Your efforts are critical to the success of our work to protect and enhance the environmental health of Casco Bay.

We hope the resources below are helpful, but please do not hesitate to call or email our Citizen Steward Coordinator, Peter Milholland, with any questions.

Peter can be reached at 207-799-8574 ex. 207 or pmilholland [at] cascobay [dot] org


New Volunteer Training Class

Sign up with Peter at 207-799-8574 ex. 207 or pmilholland [at] cascobay [dot] org

  • Saturday, April 8th
  • Saturday, May 13th

The training will take place at Southern Maine Community College (Sustainability Center). For directions see Directions to Friends of Casco Bay Water Quality Monitoring Training.


2017 Sampling Dates

The detailed 2017 Water Quality Monitoring Sampling Schedule

  • April 15
  • May 20
  • June 17
  • July 8
  • July 22
  • August 12
  • August 26
  • September 9
  • September 23
  • October 14

2017 Sites Needing Coverage

You can see a list of sites needing coverage this year here.


Water Quality Monitoring Resource Videos

Click on the title of the video you would like to view.

Calibrating pH Meter

Establishing Sampling Site

Dissolved Oxygen


Secchi and Water Depth

Dissolved Oxygen Titration

Hanna pH meter Instructions

You can view and print the Hanna pH meter instructions by click here.


Additional Resources

Citizens’ Water Quality Monitoring Manual


Volunteer Application