Greywater harvesting collects water from places after it’s been used by humans. So, a ton of it comes from the lavatory and laundry. With the proper treatment, it can contribute to a residential water supply system. If you’re using one of them in your building, make sure it has an NSF/ANSI 350 certification. That means it’s not going to let any contaminants get into the water supply while using it.
What Is Greywater Harvesting?
Generally speaking, greywater has been gently used. So, it doesn’t have a ton of stuff in it that needs to be removed. You can get a bunch by capturing it from the showers, but there are more places where it’s found. Before using collected greywater, it has to go through treatment. It’s full of contaminants immediately after it has been collected, given its source.
You can check out a machine’s certifications to see how well it’ll treat greywater. Typically, you want them to have a IAPMO 321. Plus, it never hurts if they have a NSF/ANSI 350.
During treatment, most of what’s in the water is taken out. So, it’s no longer in the water supply by the time it’s left. If it has a micron filter, it can remove anything down to 0.2 microns. So, even small particles won’t make it through a well-designed system.
Some of them also have UV treatment toward the end as a way to neutralize organic material. If there’s anything alive in there, the UV rays will kill them. wahaso.com creates water treatment systems for customers in the United States.