Water & Wastewater
Greywater Reuse at Home: A Practical Guide
Updated 2026-07-04 · 5 min read
Greywater is gently used water from showers, basins and washing machines (not toilets). In a water-scarce country, reusing it for the garden is one of the easiest wins for any household.
Safe to reuse — with care
- Shower, bath and basin water
- Rinse water from laundry (use garden-safe soap)
- Use it within 24 hours — don't store it
- Apply to soil, not directly onto edible leaves
Avoid reusing
- Toilet water (that's blackwater)
- Water with bleach, harsh chemicals or nappy waste
- Kitchen water heavy with grease (unless well filtered)
Simple setups
Start with a bucket in the shower, then progress to a diverter on the washing-machine outlet or a simple gravity-fed system to the garden. For larger or indoor reuse, use a professional treatment provider from the Water & Wastewater stream.
Frequently asked questions
Is greywater safe for vegetables?
Apply greywater to the soil around plants, not onto the edible parts, and avoid it on root vegetables you eat raw. Use plant- and soil-friendly, low-sodium soaps.
Can I store greywater?
No — use it within about 24 hours. Stored greywater quickly grows bacteria and starts to smell.