Name:   Osms - Subject:   Algae in Lake - See Article Date:   9/12/2015 6:54:32 PM

This recent article will explain the problem, or make suitable excuses.

http://www.alexcityoutlook.com/2015/09/11/195296/

And don't forget, it's about this time every year that the water in some areas has a bad odor because of water sitting stagnant in delivery pipes because weekenders are no longer using water.  This is caused by dying organisms in the water.  If you have either problem, call your water company.  They can drain the delivery lines.