I'm not worried about the gradual accumulation of water. It's getting a load of bad fuel that is the worry. I think Steve got a load of junk fuel some time ago and it was a big hassle.
Sometimes I wonder about this CARB fuel formulation. I have seen zero water in my fuel. There should have been some sometime or other. So far, none. I checked it after a long time of not checking. Still no water even after letting the fuel sample sit over night in a glass jar. Does the CARB fuel disperse water so that it stays in suspension and goes thru the system? I should have seen some water after all that time. Hard to believe that the fuel I've been getting is that clean. When I was running the boat there was water in the fuel quite often. Of course, in a marine environment there is condensation everywhere all the time.
I get my fuel from a CFN station. Most of the time here in Eureka. The rest in Roseville. Sometimes (rarely)in Williams. It's priced kind of high in Roseville, but it's convenient and I like the billing thru a local dealer that I know. Lowest price in the area here in Eureka.