SAFE HOME provides the most informative testing for EPA-regulated parameters in drinking water. Most DIY drinking water kits only test for common parameters like pH, Hardness, and Alkalinity ("Contaminants of Interest" listed by the EPA ), and lack technologies for testing many of the most harmful parameters regulated by the EPA (labeled "Primary Regulated Contaminants" and "Secondary Regulated Contaminants"). SAFE HOME kits test for more EPA-regulated parameters than any other competing brand today. The City Water test kit provides 15 tests for each of the same 12 parameters as our Basic Test Kit, plus one test for Lead (Low Range 1 ppb). Testing a total of 13 different parameters, with 181 total tests.