Absolute pure water - 0.055 µS/cm (20MOhms/cm) Distilled water - 0.5 µS/cm (2MOhm/cm) Mountain water - 1.0 µS/cm (1MOhm/cm) Most drinking water sources - 500 to 800 µS/cm (1.4kOhm/cm) Sea water - 56 mS/cm (18 Ohms/cm) Max for potable water - 1055 µS/cm (1kOhm/cm)
