Wasn't that the lake that caught fire in 2008? High arsenic (element, chemical symbol As) levels and lots of farm runoff that killed most of the fish population if I remember right. This water source might indeed present problems for tank water.
As OM47 mentions, all water authorities must make their inspection results publicly available. Since you probably get a water bill, that's the easiest starting place for phone numbers or web sites. Make it a project and track down the lab info on ammonia, nitrite, nitrate and arsenic and other heavy metals etc. in your tap water. It may be that you'll need to go to some sort of RO water system to supply your hobby.
~~waterdrop~~