Effectiveness Of Pollutant Removing, Runoff Mitigating Rain Gardens.

Rain garden in SeattleRain gardens are a big deal in the Pacific Northwest. In areas with combined storm and sanitary sewers, rain gardens have been installed to slow down runoff during heavy rains in order to prevent sewage overflows. A nice bonus of a rain garden is its ability to filter out pollutants (driveway oil, lawn chemicals, heavy metals etc.) from residential runoff before it reaches a sewage treatment plant and ultimately, a waterway.

So what happens to the pollutants captured by rain gardens? Do they become toxic over time? The results are surprising.

If you get a chance, check out “Are Rain Gardens Mini Toxic Cleanup Sites?” by Lisa Stiffler. I refuse to TMZ’up Ms. Stiffler’s article. [Sightline]

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