Orange County Basin - Metropolitan Water District of Southern ...

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Chapter IV – Groundwater Basin Reports Orange County Basin Figure 10-13 Areas of Colored Water in the Orange County Basin Source: OCWD, 2004 FINAL IV-10-22 September 2007
Groundwater Treatment Chapter IV – Groundwater Basin Reports Orange County Basin Six treatment projects are in effect to lower nitrate, TDS, VOC, iron and manganese, NDMA and color to acceptable levels in groundwater produced from several wells totaling approximately 20,000 AF in 2006. The locations of the treatment facilities are shown in Figure 10-14. CURRENT GROUNDWATER STORAGE PROGRAMS Orange County Basin producers have participated in a variety of groundwater storage programs with Metropolitan since 1985. These include Metropolitan’s short-term shift, cyclic water, and replenishment water programs for purchase of imported water for recharge and in-lieu. Direct recharge volumes are discussed above. In-lieu deliveries are summarized in Figure 10-15. An average of approximately 27,800 AFY was stored in-lieu in the Orange County Basin between fiscal years 1985/86 and 2004/05. On average about 15,500 AFY of short-term seasonal shift water (i.e. stored and extracted in same year) was also delivered. In June 2003, OCWD and Metropolitan entered into an agreement for the Orange County Conjunctive Use Program (Orange County CUP). The Orange County CUP allows Metropolitan to store up to 66,000 AF in the basin to be taken later by Metropolitan in-lieu of providing imported supplies during water shortage events. The balance at the end of fiscal year 2005/06 was approximately 35,500 AF. In addition to replenishment and CUP storage, Metropolitan and MWDOC entered into an agreement in late 2005 for delivery of supplemental storage water. After a combined 80,000 AF had been taken via the replenishment and CUP programs, MWDOC could purchase additional imported water for storage in the Orange County Basin at a discounted rate before June 30, 2006. This water would be stored in the Orange County Basin for five years. Metropolitan could call the water during this time period. After five years, this water would revert to the Orange County Basin. 16,000 AF of water was placed into this account. FINAL IV-10-23 September 2007
Page 1 and 2: Chapter IV - Groundwater Basin Repo
Page 7 and 8: GROUNDWATER MANAGEMENT Chapter IV -
Page 9 and 10: BPP (%) 85% 80% 75% 70% 65% 60% Cha
Page 11 and 12: Category Non-Irrigation Wells (larg
Page 17 and 18: Water Level (feet MSL) 200 150 100
Page 19 and 20: TDS Chapter IV - Groundwater Basin
Page 21: Chapter IV - Groundwater Basin Repo
Page 25 and 26: In-lieu Storage (AFY) 90,000 80,000

Orange County Basin - Metropolitan Water District of Southern ...

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