Don't count on the information being accurate. Fish species in particular.
In my area it names a small Conservation Area pond (2 acres) but has the nearby (1/4 mile away) Conservation Area lake which is 600 times larger un-named.

Also lists this lake as having walleye which it never has had, but fails to mention it has pike which it is full of.
The Conservation Authority website accurately lists species present so it's obviously they didn't reference the Conservation Authority.