Groundwater recharge

The district operates and maintains 18 major recharge systems, which consist of both in-stream and off-stream facilities. Local reservoir water and imported water are released in over 30 local creeks for artificial in-stream recharge to the groundwater basin.

In addition, the district releases locally conserved and imported water to 71 off-stream facilities (percolation ponds) which range in size from less than 1 acre to more than 20 acres. Through these streams and percolation ponds, the district recharges the groundwater basin with about 157,000 acre-feet of water each year.

The Alamitos groundwater recharge pond