OCWD Management Area
Table 3-1: TDS Water Quality Objectives for Lower Santa Ana River Basin Management Zones
Groundwater Management Zone
Water Quality Objective
2018 Ambient Quality*
Orange
580 mg/L
603 mg/L
Irvine
910 mg/L
877 mg/L
*Water Systems Consulting, 2020.
Figure 3-17 shows the average TDS at production wells in the basin for WY2016-17 to 2020-21. In general, the TDS concentrations in the Principal Aquifer in the Orange Groundwater Management Zone generally range from 300 to 400 mg/L in the Pressure Area and from 500 to 700 mg/L in the Forebay Area. In the Irvine Groundwater Management Zone, TDS concentrations range from approximately 400 mg/L west of Culver Drive to 1,000 mg/L in the area northeast of Interstate 5.
BASIN 8-1 ALTERNATIVE 2022 UPDATE
Management Area Description 3-21
Appendix F - 101
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