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	Waterbody Type
	Lakes - Natural and artificial lakes including enhanced (deepened by an added dam) Streams – streams and rivers Impoundments – Run of the river type impoundments
	Category
	Six categories distinguished principally by Acid Neutralizing Capacity (Alkalinity)
	In Watershed
	Major watershed systems in Massachusetts
	Depth Range
	Maximum lake depth, if known.  Depth is in feet.  Construct your own appropriate range by selecting a minimum and maximum depth.  This is not the depth of sampling (always about one foot).
	PalSite ID
	A unique code number for each named water body in the state.  Lake IDs are 5 digits long; stream IDs are 7 digits long.  In both cases, the first two digits are the watershed code.  Site is applicable for a limited number of streams that were sampled at more than one site.
	Sampling Time
	Select the inclusive dates to be included.
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