Greywater Constructed Wetlands
Waste Water Treatment, Constructed Wetland Designs, Gray water wetland,
Greywater is wastewater collected from domestic activities such as, sinks, laundry, showers, and bathtubs, not from toilets. Greywater can be recycled and used to water non-consumables and to develop constructed wetlands.
Constructed Wetland Designs
The photo depicts a greywater wetland. The homeowner had a failing septic field but intended to build a new house. The septic field would have been temporary as the new house was going to be built some distance away. By reducing hydraulic flows to the old, failing septic field, it recovered independently making a replacement no longer necessary.
Questions and answers about greywater
What is “Greywater”?
Water (and wastes) from sinks, laundry, showers, and bathtubs but not from toilets.
What is “Blackwater”?
Water (and wastes) from toilets.
Does the public health regulation differentiate between the two?
Under the B.C. Sewerage System Regulation (SSR) of British Columbia, both greywater and blackwater are domestic sewage, period.
What are the B.C. Regulations concerning Greywater?
The Sewerage System Regulation (SSR) does not differentiate between greywater & blackwater.
Do I need a health permit for greywater system?
Definitely yes. As the current Standard Practice Manual (SPM) does not mention greywater systems, the safest way to proceed is with the assistance of a wastewater professional. WetlandsPacific employs and works with professionals.
Are composting toilets legal in BC?
Yes and maybe. Many B.C. highway rest stops are served by composting toilets and the SSR does not come into effect until outside the dwelling so it is up to the local plumbing code.
What are the options for treating greywater?
At a minimum you will need to have tankage that will function as a septic tank to liquefy solids, a way to further treat the effluent to remove the possibly many remaining contaminants, and a place to disperse the effluent subsurface in a manner that does not constitute a public health hazard.
Does WetlandsPacific design and build greywater wetlands?
Yes, we built the first one in 2003.
Are constructed wetlands for greywater legal in B.C.?
While not specifically mentioned in the code, a wetland pond that is constructed and operated so as to not cause a health hazard scenario as described in Section 2.1 of the SSR, would not be in conflict with the regulation.
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