I see lots of Chloride-Sulfate imbalances in these reports.
Except for hopfenundmalz, they all seem pretty tame to me. FWIW I don't think there's anything magical about a SO4:Cl ratio. 20:10 won't taste anything like 100:50. For that matter, mine is about 20:1 but hoppy beers don't taste quite right without more gypsum.
Anyway, here's mine. Lawrence, Indiana - we're surrounded by, but separate from, metro Indianapolis water.