5. PFAS TREATMENT FACILITIES AND PROGRAM AGREEMENT WITH THE ORANGE COUNTY WATER DISTRICT Tustin Water Services currently operates three groundwater wells potentially impacted by per-and polyfluoroalkyl substance (PFAS) contamination in the Orange County Groundwater Basin. Staff and the City Attorney have been working with the Orange County Water District (OCWD) and nine other groundwater producer agencies to develop a PFAS Treatment Facilities and Program Agreement (Agreement) that will facilitate OCWD funding 100 percent of the design and construction, as well as 50% of operation and maintenance costs for treatment facilities to remove PFAS contamination at affected drinking water wells within the groundwater basin.