eli ▁conflict — inde ed , ▁according ▁to ▁former ▁Isra eli ▁prime ▁minister ▁A riel ▁Sh aron , ▁it ▁was ▁one ▁of ▁the ▁causes ▁of ▁the ▁ 1 9 6 7 ▁Six - Day ▁War . ▁In ▁practice ▁access ▁to ▁water ▁has ▁been ▁a ▁cas us ▁bel li ▁for ▁Israel . ▁Article ▁ 4 0 ▁of ▁the ▁append ix ▁B ▁of ▁the ▁September ▁ 2 8 , ▁ 1 9 9 5 ▁Os lo ▁acc ords ▁stated ▁that ▁" Is rael ▁recogn izes ▁Palest ini ans ' ▁rights ▁on ▁water ▁in ▁the ▁West ▁Bank ". ▁ ▁Israel ▁obtain s ▁water ▁from ▁four ▁sources : ▁rain water ▁that ▁flows ▁naturally ▁into ▁the ▁Sea ▁of ▁Gal ile e ▁and ▁the ▁Jordan ▁River ▁( c . ▁ 3 6 % ), ▁the ▁mountain ▁aqu if ers ▁( c . ▁ 2 8 % ), ▁the ▁coast al ▁aqu ifer ▁( c . ▁ 1 4 % ), ▁and ▁water ▁rec y cling ▁( c . ▁ 2 3 %). ▁Al most ▁all ▁the ▁water ▁used ▁in ▁the ▁Palest in ian ▁areas ▁other ▁than ▁rain water ▁is ▁drawn ▁from ▁the ▁under ground ▁aqu if ers ▁( mount ain ▁aqu ifer ▁c . ▁ 5 2 %, ▁coast al ▁aqu ifer ▁c . ▁ 4 8 %). ▁The ▁Palest in ian ▁Author ity ▁has ▁not ▁developed ▁any ▁significant ▁waste water ▁treatment ▁facilities . ▁The ▁mountain ▁aqu if ers ▁lie ▁mostly ▁under ▁the ▁West ▁Bank ▁and ▁the ▁coast al ▁aqu ifer ▁mostly ▁under ▁the ▁Isra eli ▁coast al ▁plain