Cadmium in Drinking Water: Health Risks, Sources, and How to Remove It
Cadmium is an inorganic contaminant that can occasionally be found in drinking water systems. The U.S. Environmental Protection Agency (EPA) regulates this substance and has established a Maximum Contaminant Level (MCL) of 5 μg/L. Understanding its presence and limits is an important part of ensuring clean drinking water.
Health Effects
Consuming water with elevated levels of cadmium can lead to health concerns. The primary health effect associated with exposure to this contaminant is kidney damage. Ensuring levels remain below the regulatory limit is key to protecting long-term health.
How Cadmium Gets Into Tap Water
Cadmium can enter drinking water supplies from several distinct sources. It may leach into water through the corrosion of galvanized pipes or run off from industrial operations such as metal refineries and battery manufacturing. Additionally, cadmium can occur naturally in the environment through erosion of natural deposits.
How to Remove Cadmium From Your Water
Water systems can be treated to effectively reduce cadmium levels. Common and reliable treatment methods include coagulation/filtration, ion exchange, and reverse osmosis. Filtration systems utilizing these techniques are typically certified for contaminant reduction.
Should You Test Your Water?
You can verify the cadmium levels in your municipal supply by checking your local consumer confidence report or searching on WaterQ. If you use a private well, having your water analyzed by a certified laboratory is the best way to verify its safety. You can also look up your local water system on WaterQ or check the Cadmium data page for reported levels in your area.
Frequently Asked Questions
Is Cadmium dangerous in drinking water?
Yes, cadmium can pose a health risk if it is present in drinking water above safe limits. The main health concern from long-term exposure to this inorganic contaminant is kidney damage. Because of this risk, public water systems are required to keep levels below the federal limit.
How does Cadmium get into tap water?
Cadmium typically enters tap water through the corrosion of galvanized pipes, runoffs from metal refineries and battery manufacturing, or from natural underground deposits.
How can I remove Cadmium from my water?
Cadmium can be removed from drinking water using treatment methods like coagulation/filtration, ion exchange, or reverse osmosis.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.