Woodbury, MN has a couple sections around that and another section at over 5800%. And I believe that's over the proposed limits, not over minimum reporting levels.
This map shows water systems included in the EPA's records, as of Nov. 9. It’s based on boundaries developed by SimpleLab, a water-testing company. Click on a system to see the number of pollutants detected at or above the EPA's minimum reporting levels and by what percent they exceeded those limits.
Oh ok, I was going by the legend text and assumed incorrectly about what "limit" meant. Though I'm not sure there is a maximum or if anything over the minimum reporting limit is unsafe.
I believe "minimum reporting levels" is just the level at which everything must be reported by the state to the EPA (so below the minimum level would not need to be reported).