Can you use tank water to water your plants? Sure, in a pinch. Just don’t pour it on your salad greens. The trace amounts of cleaning chemicals or minerals won’t kill your fern, but they’re not exactly organic fertilizer.
How to Effectively Clean Your Toilet Tank | Harpic | Harpic
What about washing your hands? If you’re stuck without running water (like during a camping trip with a port-a-potty), tank water is better than nothing. But wash with soap afterward, because that water has been marinating in plastic and rubber parts.
The “Cleanest” Part of the Toilet
Believe it or not, the cleanest water in your toilet is actually in the bowl right after a flush. That water is fresh from the tank, but it hasn’t sat around yet. Of course, it’s still touching porcelain that sees a lot of action, so don’t get any ideas about using it for soup.
Here’s a fun comparison: the tank water is like the air in your attic. It’s not poisonous, but you wouldn’t bottle it and sell it as fresh. It’s just there, doing its job, and best left undisturbed.