Is it just me, or does the whole 'water contaminated with e-coli' thing seem a bit of a non-issue?

As in, it should not stop someone from visiting/hiking Whitney, since they should be filtering their water anyway - and a combination of something like the Sawyer Mini and Steripen easily counters the e-coli threat.

Does this also mean that the kitchen at Whitney Portal was using untreated stream water? Because if they were on mains supply, this should not effect them.