How Coke and Pepsi make millions from bottling tap water
consumerreports.org
consumerreports.org
There's bits on equality in billing, criticism of profits, criticism of undercharging for groundwater, undercharging for surface water, something about perceived quality of tap water, and a plug for their review on home water filters. It also lacks specifics around how widespread most of its criticisms are--it just has an example of a particular criticism.
I'm not sure what to take away from this.
At all times people should have emergency water. fema recommends two weeks.
https://www.fema.gov/pdf/library/f&web.pdf
If you don't understand why this is especially important in a pandemic, just trust fema as a minimum.
That's about two weeks (drinking) for most families (30-80 gallons).