The Wisconsin Department of Natural Resources (WDNR) will now allow development projects that properly use permeable pavements to receive stormwater credits. Over the last two years, WDNR and the Standards Oversight Council have worked with a diverse team of experts to develop a conservation practice standard for permeable pavement systems that provides guidance on design, installation and maintenance to achieve desired water quality benefits. Developers that use permeable pavements instead of traditional asphalt or concrete are able to earn stormwater credit toward meeting water quality performance standards.

“Permeable pavement is an important addition to our toolbox of acceptable stormwater management practices. Allowing the use of an emerging technology like permeable pavement will benefit Wisconsin water resources and provide another option for the regulated community.” Pete Wood, Water Resources Engineer, WDNR; Permeable Pavement Standard Development team leader.

Permeable pavement is an alternative to concrete and asphalt that allows stormwater to move through the pavement surface and into a storage reservoir before soaking into the ground or being released. When it’s compared to asphalt or concrete, properly used permeable pavements can significantly reduce the volume of stormwater discharged from developed areas.

Construction permits issued by the WDNR require developers to use stormwater management practices to mitigate any negative impacts that a project will have on streams and wetlands. This technical standard for permeable