Originally Posted by deniseO30
Not a significant threat when using a municipal system to fill tanks, there is a greater risk of giardia contact when swimming n the marina pool.
There are several bugs that are not killed by chlorination, but again, I don't consider them a viable threat if filling from a municipal source. Streams, cisterns, ponds, long stagnated sources, are a different story.
No wrong answer here though. Everyone should do what they are comfortable with.