bioswales are useful low-impact development work to decrease the velocity of stormwater runoff while removing pollutants from the discharge. they are extremely beneficial in protecting surface water and local waterways from excessive pollution from stormwater runoff. the longer the runoff stays within the bioswale, the better the pollutant removal outcome. it is also beneficial in removing standing ponds that could potentially attract mosquitos. bioswales can also be designed to be aesthetically pleasing and attract animals and create habitats. bioswales can also be beneficial for groundwater recharge.