The treatment wetland receives water from a part of the Santa Ana River that in the summertime consists almost entirely of wastewater effluent from cities like Riverside and San Bernardino.
圣安娜河的部分河水流入人工湿地， 每到夏天，圣安娜河里就全是污水， 都来自里弗赛德市和圣贝纳迪诺市。