Is Dishwashing Liquid safe for grey water and septic systems?Updated 4 hours ago
TL;DR: Yes. Dishwashing Liquid can be used in homes that reuse grey water when used as directed and well diluted in a normal wash. Great for rural homes, regional properties, camper vans, caravans, and boats.
Last reviewed: April 2026
Is Dishwashing Liquid safe for grey water and septic?
✓ Why it's safe
Dishwashing Liquid doesn't contain chemicals known to be harmful for grey water or septic systems and is independently audited to meet the GECA Cleaning Products Standard. With a balanced pH (around 6.5) and readily rinsing surfactants, the used water is suitable for most garden irrigation setups.
✓ Great for rural & mobile setups
If your home relies on a septic tank, grey water system, or portable water setup, Dishwashing Liquid is a reliable choice. Always follow your system's manual and don't pour concentrated product directly into the system. Scrape plates to keep fats and solids out. Patch-test if watering very sensitive plants.
Soak, don't scrub
Dishwashing Liquid is enzyme-powered. Fill the sink, soak your dishes, and let the formula lift grease and food soils for you.
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