skip navigation
New Hampshire Department of Environmental Services

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.

green arrow Hot Topics

green arrow Publications

green arrow Technical Assistance

green arrow Related Programs

green arrow Contact Us

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

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

copyright 2017. State of New Hampshire