The Rhode Island Department of Public Health has information at http://health.ri.gov/water/about/lead/

The NSF certifies plumbing fixtures, water filters, and bottled water and can be reached at 1-800-NSF-MARK or through their website at www.nsf.org.

The Environmental Protection Agency (EPA) website on lead in drinking water: https://www.epa.gov/ground-water-and-drinking-water/basic-information-about-lead-drinking-water