The water treatment facility on Eucalyptus Avenue in Chino Hills, west of Pipeline Avenue, won’t be operational until the end of the year, after the city learned it would have to build a meter station to comply with a state-mandated blending plan. Utilities Operations Manager Mark Wiley told the city council on June 10 that the city has been going back and forth with the State Water Resources Control Board for a few months on the operations and maintenance monitoring plan. “Another hurdle the state threw out in the 11th hour is that we have to construct a metering station to blend a specified amount of water in the distribution system with well water,” Mr. Wiley said. “Once we build the station, the state needs to sign off on it and issue a permit before we can start operating.” The city expects to have a fully operational facility in December 2025, he said. Mr. Wiley said it will cost approximately $710,000 per year in operations and maintenance costs to run the treatment plant.