The patent-pending SafeGuard H2O™ is an innovative approach to providing an economical and reliable treatment for small and large water systems affected by contamination from Cr(VI), a known carcinogen. SafeGuard H2O is an affordable, accurate and intelligent Cr(VI) treatment system that generates a stannous ion reagent in-situ via an electrolytic process. The system also features an online Cr(VI) analyzer to measure system performance in real time.