Researchers have used treated wastewater to support native reforestation. 

In a recent study, NZ scientists tested irrigating native reforestation projects with treated municipal wastewater.

They say it could increase wastewater recycling and enhance the growth of native plant species. 

After irrigating a field site in the Banks Peninsula for three years, researchers found there was a negligible effect on the soil chemistry, and no increase in any elements that may pose a risk to humans or ecosystems. 

The experts say that as long as the native vegetation is effective in protecting local waterways from excessive nutrient run-off from the wastewater, which poses risks to public health and aquatic ecosystems, this method of reusing wastewater could help tackle multiple environmental challenges.

More details are accessible here.