City department of water and power was doing some unrelated sewer work but ran into a problem, and shut off water in my neighborhood. No alert to warn of the shutoff, or an alert when it came back on. I found out because I worked from home and noticed the tap wasn’t working and went out to ask the workers on the road if they shut the water off. Chances are virtually the entire neighborhood besides myself and another curious local pedestrian did not flush their taps after that loss of pressure no doubt induced contamination (most of the housing stock is 100 years old so runs into homes are probably in terrible shape).