Graywater vs. Caught Water: What's the Difference for Garden Irrigation?

Definitions Matter

Graywater has passed through a drain—bathtub, shower, washing machine, bathroom sink. Plumbing codes strictly regulate its collection and reuse.

Caught water is intercepted before it enters the drain—e.g., a bucket in the shower, vegetable rinse water, or rain barrel catchment. It is not governed by plumbing codes.

Your Situation

Water used to rinse vegetables is caught water. Using it on containers and garden plants is perfectly acceptable, even with a bit of detergent. It does not fall under outdoor watering restrictions. Apply it only to your own property and only to plants (not edible roots if soap is present). Common sense prevails.

Regulatory Note

Graywater reuse is permitted under Georgia rules only if it complies with local ordinances. Caught water, in this author's view, should be regulated solely by the principle: "Apply to plants on your own land."