State law requires water retailers to provide information to their customers about the quality of their drinking water and the reliability of the water supply. The City of Chino Hills is dedicated to providing you with a safe and reliable supply of high quality drinking water. Prior to reaching your faucet, your water undergoes an extensive treatment and testing process as dictated by the State Water Resources Control Board (SWRCB) and the U.S. Environmental Protection Agency (USEPA).
To learn more about Chino Hills water quality, we urge you to read the annual Water Quality Consumer Confidence Report. Any questions referencing this report, can be made to our Water Quality Technician at (909) 364-2808. You can also download a PDF of the 2018 Water Quality Consumer Confidence Report.
On July 18, 2017, the SWRCB adopted a resolution, which established a proposed maximum contaminant level (MCL) of 5 nanograms per liter (parts per trillion) for 1,2,3-Trichloropropane (TCP). Prior to this, a drinking water standard specific to TCP did not exist at the national or state level. To learn more about this new drinking water standard, read the "Introduction" found in the 2018 Water Quality Consumer Confidence Report.
Urban Water Management Plan
The City updates the Urban Water Management Plan (UWMP) every five years. See the 2015 UWMP Errata Sheet for Minor Corrections.