Thinking about adding a similar system to your home or community? Alternative on-site wastewater treatment should be simple to construct, operate, and maintain. While constructed wetlands are legal across the country, there are definitely some areas of the country where it is more widespread, well-known and accepted by the water authorities. Most regulations are on a state-by-state or even county-by-county basis, so you'll want to reach out to your local resources as soon as possible.

Homeowner Cost Cutter: Build Your Own Constructed Wetland
(National Environmental Services Center)

Constructed Wetlands: Using Human Ingenuity, Natural Processes to Treat Water, Build Habitat 
(Water Resources Research Center)

EPA Constructed Wetlands Resource List 
(Environmental Protection Agency)