My apartment produces approx 1800 litre of grey water per day.

So I'm thinking may be I could build my own ( DIY ) water treatment facility which will remove the dirt and remove the smell so that I can use this water for toilet flushing atleast.

Any cool ideas on how I can do this.

My idea is

I will build a Concrete water storage pit in ground and I will have overhead plastic overtank at terrace and water pump to push to water overhead.

I will have two stage water purifying filters which will remove all the dirt particles and I will drop some bad smell remove( I don't know if anything exists).

I'm not sure if this is right one and will work quite effectively. Please advise

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    So you say "in house" but then say "sump in ground". So you have an earth floor in the basement? Or you have a garden where there is space for more equipment?
    – Solar Mike
    Commented Oct 17, 2021 at 15:53
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    "cost effective" depends a lot on the relative costs. Typical municipal water is not terribly expensive, but in some places (including country or region may help) it is more expensive than others. Alternatively, well water is not expensive until you run out of capacity and have to build a new/bigger/deeper well. In some cases, cutting usage (1800 liters/day sounds like a lot, but depends on the number of people) may be a more cost-effective way to cut down total input water requirements (e.g., low-flow showers, high-efficiency washing machine, etc.) Commented Oct 17, 2021 at 15:57
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    Will also need a completely separate water lines just to toilets,etc, apart from any drinking water lines. American lawyers would like you.
    – crip659
    Commented Oct 17, 2021 at 16:42
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    Look up the term "reclaimed water" if you want an idea of what's involved here Commented Oct 17, 2021 at 17:00
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    Step one is to figure out if the Local Authority Having Jurisdiction permits greywater reclamation at all. Some do not. Many that do have specific requirements and regulations you need to meet. Many Permaculture resources have ideas about processing greywater through a biofilter/reed bed type of setup, which is one approach to make it suitable for irrigation uses - if and only if your LAHJ approves, or you are so far out in the boonies that you don't have an LAHJ for this stuff (which is fairly unusual.) Depending on method you may only be able to do it part of the year.
    – Ecnerwal
    Commented Oct 18, 2021 at 0:40


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