Gray Water Defined: Safe Sources for Garden Irrigation

Gray water = used water from bathroom sinks, tubs, showers, and washing machines. Black water = toilet and kitchen sink waste (high organic load, pathogens).

Collection Methods

• Bucket in shower/tub (easiest).
• Plumbing diversion requires a permit.
• Use within 24 hours; don’t store long.

Safe Use

• Apply to ornamental beds, not edible crops.
• Avoid contact with foliage.
• Use plant-friendly soaps (no boron, salt, bleach).

Check local codes before installing systems.

Bucket collection of shower gray water for garden use.