I wonder how long this will last? a boiled water requirement in response to a short term pressure loss seems more like a "lets be safe" rule than a "things are

I wonder how long this will last? a boiled water requirement in response to a short term pressure loss seems more like a "lets be safe" rule than a "things are contaminated". When I was a kid we had a 3 week boiled water restriction due to a seagull getting trapped and dying inside a water tank.