The Inland Empire Utilities Agency (IEUA) is a regional wastewater facility and wholesale supplemental water supplier in southwestern San Bernardino County, in the Inland Empire region of Southern California.

The Agency's service area covers 242 square miles and approximately 700,000 people.

The agency is also a biosolids and fertilizer treatment provider and remains a leader in protecting the quality of the area's groundwater.

IEUA was formed in 1950 as the Chino Basin Municipal Water District (CBMWD) and joined MWD in the same year.

The park is located at the IEUA headquarters adjacent to the LEED Platinum buildings.