How can i make the water last during this drought?

Use sparingly: Flush the toilet only for feces. Collect what rainwater you can. Take a shower with a bucket next to you to use the collected water to flush toilets and water plants. Use disposable plates and cups so you don't have to wash anything.

Buy at Walmart: Still good to have a purifying pitcher. Boiling water kills living organisms, but does not help otherwise (i.e, get rid of poison, may makke it worse). Body needs water, no doubt about it. It will affect kidneys and eventually everything. Plan a Quart a day, and travel if necessary to always have at least two weeks supply. PS, I have no stock in anything including Walmart.

Be mindfull: Use your reserve water wisely. Try to use disposable plates and utensils. Try to collect rain water to flush toilet, etc. Keep the drinking water only for consumption and food preparation. Hope this helps.

Utilize less water: for irrigation (conserve). Drinking water is not the problem it's washing your car and watering your plants