1. Welcomes

2. The Importance of Groundwater in Southern Los Angeles County

3. What is Groundwater? Water Table (groundwater) Underground (soil)

5. 4 Million People Area = 420 mi 2 > 400 Water Wells Pumping 250,000 acre feet (77 BILLION Gallons) per Year Local Groundwater Supply Central Groundwater Basin and the West Coast Groundwater Basin 43 Cities Over 10% of California’s population San Gabriel Valley Coyote Hills Palos Verdes Hills Puente Hills Merced Hills Santa Monica Mtns Long Beach San Gabriel River Los Angeles River Los Angeles San Gabriel Mtns Pacific Ocean Newport-Inglewood Uplift Newport-Inglewood Uplift West Coast Basin Central Basin

6. Groundwater provides of total water demand In our region… 40%

8. How WRD Manages the Groundwater Basins Replenishment of groundwater Groundwater Clean Up Basin monitoring Basin modeling

9. Pacific Ocean Orange County Surface Recharge Coastal Injection West Coast Basin Central Basin Whittier Los Angeles Long Beach Torrance Inglewood 5 miles 5 km

10. San Gabriel spreading grounds Rio Hondo spreading grounds

11. Forebay (unconfined aquifers) Surface Recharge Spreading Basin Bedrock (Pico Formation) Ocean Surface Recharge of Groundwater Pressure Area (confined aquifers) Clay (aquitard) Clay (aquitard) Clay (aquitard) Aquifer Aquifer Aquifer

12. Results of WRD basin management Rising water levels & drought protection

13. Groundwater Monitoring Nearly 300 monitoring wells at 41 locations (more wells planned)

14. Nested Monitoring Wells Sampling Drilling

15. ANNUAL GROUNDWATER QUALITY TESTING Over 100 Chemicals Monitored

16. Two Annual Reports to Describe Basins

18. Historical Cost of Groundwater compared to Imported Water (cost per Acre Foot) Slide

19. Breakdown of Replenishment Assessment Projects, Programs, Monitoring, Planning, Administration, etc. Cost of Water

20. Spreading Water Costs in Central Basin

23. WRD’s WIN Program will reduce or eliminate need for imported water to replenish groundwater

24. For more information visit www.wrd.org