The main purpose of a sand filter is to collect stormwater, rid it of pollutants, and then discharge the water into the storm sewer system. First, water is routed from an impervious surface to the ...

The arrow indicates the direction of water flow. Biofilters contain filter medium grains (e.g., sand, granular activated carbon) that are covered with biofilms. The biofilm activities break down ...

In an effort to safeguard the region’s drinking water from wildfire-related contaminants, the Portland Water Bureau is advancing its filtration capabilities to better prepare for future environmental ...

The New LifeStraw Go Series Water Filter Tumbler in Teal. From work to workouts and all the refills in between, LifeStraw's new 18-oz stain ...