Molybdenum is a metal used in steel and electronics. It enters water from mining and industrial activities. While essential in small amounts, excess can cause health problems.

Molybdenum occurs naturally in rocks and soil but can concentrate in water due to mining and industrial activities. It's commonly used in steel alloys, electronics, and lubricants. Water contamination is typically measured through laboratory analysis. While molybdenum is an essential trace element for humans and plants, excessive intake may lead to health issues. Water treatment methods such as reverse osmosis or ion exchange can effectively remove molybdenum from drinking water.