Horton v. Town of North Attleborough

This case relates to the plumbo-solvency of water, that is, the capacity of carbon dioxide, found to some extent in all natural water, to dissolve lead while water stands in or passes through lead pipe, and thus to render the water poisonous. Three tenths of a part in a million, or three parts in ten millions, is adopted by the United States Department of Health as the maximum amount of lead which may safely be in drinking water. Four parts of lead in a million make drinking water positively dangerous. There was evidence that thirty parts of carbon dioxide in a million make it dangerous to…