... 0.03ppm (depending on different area)5 stage water purification system:1) stage: 5 micron sediment catridge filter with slim ... remove the following hard water contaminants that may be present in your water: lead, cooper, barium, chromium, mercury, sodium, cadmium ... ) Auto shut-off valve, mini flow restrictors, stainless steel check valve4) Long reach chrome faucet5) Feed water connector6) Drain ...