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New Hampshire Department of Environmental Services
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Lake Trophic Survey Program
Lake trophic surveys were initiated in 1975 by NHDES with the intention of determining trophic state of lakes and ponds greater than 10 acres as required by the federal Clean Water Act. By collecting physical, chemical, and biological measurements, 780 lakes and ponds received trophic class ratings and tens of thousands of data points were gathered from 1975-2008. The program was discontinued in 2008. However, to ensure NHDES could continue to make informed decisions concerning changes in trophic status, provide recent water quality information to the public, monitor regional environmental influences, and facilitate water quality stewardship, the lake trophic survey program was modified and reinstated in 2013.

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  • Scott Ashley, Environmentalist
    NH Department of Environmental Services
    29 Hazen Dr.
    Concord, NH 03302
    (603) 271-2968
    Scott.Ashley@des.nh.gov



NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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