Lathrop Consolidated Treatment Facility Surface Water Discharge Project


SCH Number
Lead Agency
Lathrop, City of (City of Lathrop)
Document Title
Lathrop Consolidated Treatment Facility Surface Water Discharge Project
Document Type
NOP - Notice of Preparation
Present Land Use
General Industrial (Gl)/General Industrial (IG)

Document Description
The City is seeking to discharge treated effluent from the City's Consolidated Treatment Facility (CTF) that meets the requirements for disinfected tertiary recycled water in accordance with Title 22 of the California Code of Regulations to the San Joaquin River (SJR). The majority of CTF effluent would be discharged to the SJR during the winter, non-irrigation period (when river flow is relatively high) and less would be discharged in the irrigation season, during which CTF recycled water would be used for landscape irrigation. This would allow land designated under the General Plan for urban uses to be developed. Project implementation would involve repurposing approximately 1.1 miles of existing recycled water pipeline or constructing approximately 1. 7 miles of new effluent pipeline within City rights-of-way, and installing a new river side-bank or bottom-diffuser outfall to discharge excess treated effluent from the CTF to the SJR. Construction of the proposed project is expected to begin in Spring 2021 and be completed within approximately 24 to 30 months.

Contact Information
Glenn Gebhardt
City of Lathrop
390 Towne Centre Drive
Lathrop, CA 95330

Phone : (209) 941-7200


37°47'37.6"N 121°18'22.7"W
Lathrop Mossdale Village
San Joaquin
Cross Streets
Tesla Drive and Christopher Way; Sadler Oak and Inland Passage Way
Total Acres
Parcel #
198-130-19, -20, -21 , -22, -35, -36, -45, -46, -47, and -48
State Highways
SR120, I-5, I-205
Mossdale, Lathrop, & Stella Brockman Elem; Sierra HS
San Joaquin River

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (surface water discharge pipeline and outfall)
Local Action
Encroachment Permit
Project Issues
Air Quality Archaeologic-Historic Biological Resources Flood Plain/Flooding Geologic/Seismic Noise Public Services Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Cumulative Effects
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, Bay Delta Region 3 California Department of Fish and Wildlife, Central Region 4 California Department of Fish and Wildlife, North Central Region 2 California Department of Parks and Recreation California Department of Water Resources California Highway Patrol California Natural Resources Agency California Public Utilities Commission California Regional Water Quality Control Board, Central Valley Sacramento Region 5 Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Drinking Water, District 10 State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Divison of Financial Assistance California Native American Heritage Commission California Department of Transportation, District 10 Central Valley Flood Protection Board California State Lands Commission


Environmental Document
Lathrop CTF-SWD NOP_20191118   PDF 931 K Letter   PDF 224 K
NOC   PDF 993 K
State Comments
2019110339_Caltrans   PDF 337 K 2019110339_CVFPB   PDF 684 K 2019110339_NAHC_Lathrop Consolidated Treatment Facility Surface Water Discharge Project 11-18-2019   PDF 189 K 2019110339_State Lands_Lathrop_CTF_Comment_Letter_signed   PDF 393 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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