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Is is possible to dump waste water from showers and sinks directly into the ground using pierced pipes with siphons somewhere near the property as long as we only use washing products which are biodegradable (e.g. pure Castile with peppermint and such) - in Quebec or Ontario?

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    Not sure about your local codes but here "graywater" systems still need permitting approval. Check with your local authorities to see if it is permissible where you are.
    – Kyle
    Sep 12, 2022 at 6:05
  • It would not be allowed where I live, so it depends on location. How long will the soap take to degrade
    – Traveler
    Sep 12, 2022 at 6:44
  • Check out reed beds natural water treatment is possible BUT choice of soap etc is crucial and you also need sufficient space.
    – Solar Mike
    Sep 12, 2022 at 7:08
  • One book is "Lifting the lid" by Halestrap and Harper.
    – Solar Mike
    Sep 12, 2022 at 7:12
  • Very dependent on local rules, possibly more local than the province, unless the province as a whole prohibits it. Most places with a sewer system won't permit this type of use. Some places that do permit it limit it to the kitchen sink, due to small amounts of unpleasant material potentially showing up in bathroom sinks, clothes washers, and showers. Permaculture resources have typical examples of reed bed filtration, etc. if it is allowed where you are.
    – Ecnerwal
    Sep 12, 2022 at 12:41

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