Hexavalent Chromium-6 Mitigation Project
Summary
SCH Number
2026091017
Lead Agency
City of Coachella
Document Title
Hexavalent Chromium-6 Mitigation Project
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
Zoning: Rural Rancho, General Neighborhood, Urban Neighborhood, Open Space; GP: Various: Public Facilities, Agricultural Rancho, Urban Neighborhood, Open Space
Document Description
The Coachella Water Authority (CWA) is required to comply with state requirements to lower Cr-6 levels in drinking water by October 2027. The CWA proposed to implement a remediation program to reduce the levels of Chromium-6 (Hexavalent Chromium) in the City’s drinking water to 10 micrograms per liter (ug/l) as required by the State of California. The project will include retrofitting seven domestic water wells and the installation of wastewater discharge lines and three sewer line upgrades. The Project sites are located throughout the city with two sites located adjacent to city parks, while other sites are located within existing residential subdivisions and open lands. Well improvements will include filter and reduction vessels, additional chemical injection systems and electrical systems, on-site backwash tanks and discharge lines. preliminary design of each of the well sites’ treatment measures using reduction/coagulation/filtration (RCF) treatment technology. The RCF treatment process includes ferrous iron chemical injection to reduce Cr-6 to less soluble trivalent chromium (Cr(III) or Cr-3) through reduction contact vessels.
Contact Information
Name
Castulo Estrada
Agency Name
City of Coachella and Coachella Water Authority & Sanitary District
Job Title
Utilities Director
Contact Types
Lead/Public Agency / Project Applicant
Phone
Email
Name
John D Criste
Agency Name
Terra Nova Planning & Research, Inc.
Job Title
Principal Planner
Contact Types
Consulting Firm
Phone
Location
Coordinates
Cities
Coachella
Counties
Riverside
Regions
Southern California
Cross Streets
Seven CWA Well Locations and Three Sewer Line Segments within the corp. limits of Coachella
Zip
92236
Total Acres
2.75
Parcel #
603-232-019 & 030, 768-210-014, 763-141-019 & 020, 603-220-035 and 051, 603-150-017, 612-540-008
State Highways
111 and 86
Railways
UPRR
Airports
Jacqueline Cochran Regional Air.
Schools
Bobby Duke Middle School, Coral Mountain Academy
Waterways
Coachella Valley Stormwater Channel
Notice of Completion
State Review Period Start
State Review Period End
State Reviewing Agencies
California Coachella Valley Mountains Conservancy (CVMC), California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW), California Department of Parks and Recreation, California Department of Toxic Substances Control (DTSC), California Department of Transportation, District 8 (DOT), California Department of Transportation, Division of Aeronautics (DOT), California Department of Transportation, Division of Transportation Planning (DOT), California Department of Water Resources (DWR), California Fish and Game Commission (CDFGC), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Colorado River Basin Region 7 (RWQCB), Colorado River Board, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Drinking Water, District 20, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance, University of California Natural Reserve System (UCNRS)
Development Types
Water Facilities (7 domestic domestic water well remediation)(Type Treatment, MGD 16.5)
Local Actions
Municipal Infrastructure
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wildfire
Public Review Period Start
Public Review Period End
Attachments
Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
Notice of Completion [NOC] Transmittal form
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