The　objective　of　this　article　was　to　investigate　the　potential　for　the　dissolution　and　leaching　of　certain　chemical　elements　from　the　protective　mortar　coatings　of　prestressed　concrete　cylinder　pipe　(PCCP)　into　drinking　water　in　the　event　of　leakage　and　how　this　might　affect　the　overall　quality　of　the　water　delivered　to　consumers.　The　mortars　as　linings　are　also　typically　used　for　renovation　of　old　pipes.　Samples　from　three　frequently　used　mortar　coating　mixtures　underwent　immersion　in　water　after　28　days　of　curing　and　were　monitored　for　430　days.　The　water　was　tested　for　pH　levels　and　the　presence　of　aluminum,　chromium,　lead,　and　iron,　in　accordance　with　the　standards　set　for　human　consumption　in　Moroccan　and　other　countries　such　as　Australia,　Canada,　and　the　United　States,　as　well　as　organizations　such　as　the　European　Union　and　World　Health　Organization.　The　results　indicate　that　the　highest　levels　of　aluminum,　iron,　chromium,　and　lead　leaching　occurred　after　the　initial　contact　with　water,　gradually　declining　over　time.　Furthermore,　the　inclusion　of　silica　fume　and　fly　ash　in　the　coating　increases　the　potential　for　chemical　element　leaching.　Additionally,　preinstallation　pipeline　washing　demonstrates　its　effectiveness　in　reducing　the　leaching　of　chemical　elements　into　drinking　water　in　the　event　of　leakages.　The　overall　results　suggest　that　the　likelihood　of　contamination　of　drinking　water　by　leaching　of　chemical　elements　from　the　mortar　coating　in　case　of　a　leakage　appears　to　be　negligible　under　the　studied　conditions.　©　2023　Wiley-VCH　GmbH.