Moldy Water?

For the past week or so, our tap water has had a very moldy aftertaste which has made it difficult for me to drink.  I finally started asking around, and someone at book club last night told me that it has to do with an algae that is blooming and that it wasn't hazardous.  So, when I got home, I googled it and found this article.  I think it's time to finally get that water filter that I always keep meaning to buy to see if that helps with the taste.