Lake Monitoring Report
Wentworth-Crescent NH Lay Lakes Monitoring Program Report, July 7, 2018
The Wentworth Watershed Association and the Water Quality Committee would like to recognize the long hours and hard work of our Volunteers
Governor’s Deep; Mary Schillereff/Tisha Daniels
Fullers Deep; Dave and Deb Denby/Rich Masse and Andrea Dudley
Triggs; Marie Donohue/Gail Craven
Crescent; Lynn Johnson
Wentworth/Crescent LLMP volunteers monitor lake temperature and transparency at weekly intervals, and collect columns of water to assess thermal proﬁle from surface to thermocline. Once back on shore, samples are tested for chlorophyll, dissolved water color, and alkalinity. The Fullers’ team also tests for phosphorus. Water samples are taken for cyanobacteria monitoring, the testing of which occurs at UNH lab.
Volunteers’ data and samples are passed on to Bob Craycraft with University of New Hampshire Cooperative Extension for analysis. Bob and team also conduct a comprehensive sampling and assessment once a summer.
Trends to date:
Stable trends in color, phosphorus, and chlorophyll between 1986 and 2017. Water clarity measurements display a trend of decreasing water transparency between 1984 and 2017.
The dissolved oxygen proﬁle collected on August 8, 2017 by Bob Craycraft indicated a trend of decreasing dissolved oxygen concentrations near the lake bottom. Dissolved oxygen concentration is commonly considered the threshold for successful growth and reproduction of cold water ﬁsh such as trout and salmon.
Cyanobacteria did not reach bloom proportions.
Recommendation: Implement Best Management Practices within the Wentworth watershed to minimize the adverse impacts of polluted runoff, nutrients, and erosion into the lakes.
2017 Sampling Highlights in PDFs are available via WWA website, with hard copies at the WWA ofﬁce.
Longitudinal water quality Lake Reports are accessible through the Extension link of the
University of New Hampshire website.
THANK YOU MONITORING VOLUNTEERS!
The three reports can be accessed by clicking these links: