In the beautifully rugged and wild State of Maine, just east of N.H., the Maine ponds can be huge in size if they are shallow.
Lake or Pond??? .....
www.maine.gov/dep/water/lakes/lkepond.html
In Maine what differentiates a pond from a lake is the ability for sunlight to penetrate through the water to the bottom. If sunlight travels all the way to the bottom, it is a pond. If sunlight will not travel all the way to the bottom, it is a lake.
New Hampshire and Maine are different in many ways. Here's the New Hampshire difference.....
http://www.des.nh.gov/sites/g/files/...0-01/bb-49.pdf ..... between a pond and a lake.