La Habra-Brea Management Area
Alluvium: 200 gpd/ft to 10,000 gpd/ft La Habra Formation: 25,000 gpd/ft San Pedro Formation: 60,000 gpd/ft
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Historically, all three water-bearing zones of the La Habra Groundwater Basin were developed for domestic and irrigation purposes, with most wells drilled between 1916 and 1940. The City of La Habra originally drilled three production wells in the deeper aquifers. Groundwater production in these wells ceased in 1968 (Montgomery, 1977). Based on Montgomery (1979), the Alluvium and La Habra Formations are not considered to have groundwater development potential for the following reasons: the Alluvium is limited in thickness and extent, has low permeability characteristics, and is of poor water quality while the La Habra Formation’s permeable sand and gravel zones are thin and discontinuous. Groundwater production in the San Pedro Formation continues to this day. Based on Montgomery (1977), the following are expected well yields for each of the water-bearing zones of the La Habra Groundwater Basin.
Alluvium: 200 gpm
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• La Habra Formation: 100 gpm to 400 gpm • San Pedro Formation: 300 gpm to 800 gpm
The City of La Habra pumps local groundwater from the La Habra Groundwater Basin from three production wells: the Idaho Street Well, the La Bonita Well, and the Portola Well. The Idaho Street Well has a capacity of 2,000 gpm but is regulated at 1,500 gpm. Water pumped from the Idaho Street Well requires treatment before entering the distribution system. This treatment consists of chlorination, air-stripping to remove ammonia and hydrogen sulfide, and the addition of sodium hexametaphosphate to sequester iron and manganese (Malcolm Pirnie, 2011a). The capacities of the La Bonita Well and the Portola Well are 850 gpm and 1,200 gpm, respectively. The City of Brea owns and operates one non-potable groundwater well used for irrigation at the Brea Creek Golf Course (Brea, Water Master Plan Update, November 2009). The maximum capacity of this well is 450 gpm.
Table 3-1: Groundwater Production in La Habra Groundwater Basin. Acre-Feet per Year.
City of Brea 1
Year
City of La Habra
Total
2011
1,849
76
1,925
2012
1,865
86
1,951
2013
3,073
82
3,155
2014
4,094
121
4,215
2015
3,630
50
3,680
2016
3,547
86
3,633
2017 BASIN 8-1 ALTERNATIVE
3-4
Appendix F - 21
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