Editing Permeable paving (section)

=== Controlling pollutants ===
To control pollutants found in [[surface runoff]], permeable paving surfaces capture the [[stormwater]] in the soil or aggregate base below the road or pathway, and subsequently treat the runoff via [[percolation]], which allows water to infiltrate, supporting [[groundwater recharge]] or contain the stormwater to be released back into municipal stormwater management systems after a storm.<ref name = "TotaMaharaj2010">{{Cite journal|url=https://aiche.onlinelibrary.wiley.com/doi/full/10.1002/ep.10418|title=Efficiency of permeable pavement systems for the removal of urban runoff pollutants under varying environmental conditions|last=Tota-Maharaj|first=Kiran|journal=Environmental Progress & Sustainable Energy|date=2010-09-01|volume=29|issue=3|pages=358–369|doi=10.1002/ep.10418|bibcode=2010EPSE...29..358T |s2cid=98361597 |language=en|access-date=2020-12-16}}</ref> Permeable paving systems have shown effective in reducing [[suspended solids]], [[Biochemical Oxygen Demand]] (BOD), [[chemical oxygen demand]], and [[ammonium]] concentrations within [[groundwater]].<ref name = "TotaMaharaj2010"/>  In areas where infiltration is not possible due to unsuitable soil conditions, permeable pavements are used in the [[attenuation]] mode where water is retained in the pavement and slowly released to surface water systems between storm events.<ref name = "TotaMaharaj2010"/>