If properly stored and separated from potable water, graywater collected from sinks, showers, and clothes washers can be used to irrigate landscaping.
Graywater Collection & Reuse in Landscape — The Land Group, Inc.
Shades of Gray(water) - Activity - TeachEngineering
Save Water with Graywater Recycling
Water, Free Full-Text
Laundry-to-Garden: How to Irrigate with Graywater - Modern Farmer
Greywater reuse as a key enabler for improving urban wastewater management - ScienceDirect
Graywater Collection and Use
Allegheny County Eyes Code Update for Home Gray Water Systems - The Allegheny Front
Aqua2Use PRO Greywater Recycling System - Rainwater Collection and Stormwater Management
Greywater Systems & How You Can Use Them - Water Wise Group
The Reuse of Greywater: Insights