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 Research Associate, Mike Doan, with any questions.

Mike can be reached at 207-799-8574 or mdoan [at] cascobay [dot] org

If you need assistance on a sampling weekend, please call our Water Quality Weekend “Hotline”: (207) 807-0785.

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


 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