The filter is where the science happens, and ours is unlike anything mechanical. Water Pure nanofiber filters use an electropositive charge to attract and hold the negatively charged particles most contaminants carry, capturing what pore size alone cannot. They reduce lead, fluoride, arsenic, chromium, heavy metals, and pharmaceuticals while maintaining a fast flow and wasting no water. Each filter is engineered and assembled in the USA, BPA-free and lead-free, with a pre-filter wrap that extends its working life. Find the right filter for your system and keep your water at its cleanest.