How much will the surface water conversion cost? The current estimated additional cost of the West Authority’s surface water conversion effort is more than $1.5 billion. WHCRWA Admin2023-05-31T20:46:31-05:00May 14th, 2021|Conversion, Fees, Surface Water| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTumblrPinterestVkEmail