Finally, we have a big 55 gallon drum full of water
that is chemically treated to last 5 years. We bought a siphon with it so
that the water is easily removed.
As far as household water, we have some
plastic containers full of water that we have stacked up in the garage.
Unless it is summer, you can count on rain in the Seattle area, so we also have
plans on catching water on tarps that comes off the roof and down the gutters.
A water filter is a must to be sure your water is safe. You can purchase
them at many different price points.
You can also store water purification tablets.