Water departments are supposed to do surveys at residential taps to evaluate the effect of alkalinity on lead in the water as it is actually drank. Even the small town I came from does. Seattle, for example, made some changes based on these surveys: <a href="http:&#x2F;&#x2F;www.seattle.gov&#x2F;util&#x2F;MyServices&#x2F;Water&#x2F;Water_Quality&#x2F;WaterSourcesContaminants&#x2F;Lead&#x2F;index.htm" rel="nofollow">http:&#x2F;&#x2F;www.seattle.gov&#x2F;util&#x2F;MyServices&#x2F;Water&#x2F;Water_Quality&#x2F;W...</a>