by Michael X., Survival Blog:

(Continued from Part 1. This concludes the article.)

Water List

This is an item for the first three days. This is super important and needs to be one of the first items confirmed.
Check locations and condition of water sources:
Bottled Water/Stored water containers
Well water (power dependent)
Lake water – are there containers to carry and larger containers to store lake water?
Is there a rainwater collection option available?
Is the Berkey/Filtered water system ready?
Can the tub be successfully filled with water from the system before the power goes out or the line pressure is gone?
Can I treat the lake water? Do I have the sanitizer in place?