There's three gas stations in town where I live. All three of them have non-ethanol gas.
The only one that will read my card is the slowest gas station ever. IT took me 10 minutes to put 10 gallons in the Jeep's tank the other day. Super slow!
Could be a water filter needing replacement. It's not that there's an excessive amount of water in the fuel, but if it hasn't been changed in a while that's supposed to slow it down.
Gas is pulled from bottom of tank whether full or not. Unless there is a bypass on the pump, a filter that needs changing will not let any more dirt through it than a new one, probably less. Only real problem is the time it takes.