Zinc in Drinking Water: Health Risks, Sources, and How to Remove It
Zinc is an inorganic substance that can sometimes be detected in drinking water. It belongs to the category of inorganic contaminants and has an EPA Maximum Contaminant Level (MCL) of 5000 μg/L. Because of its relatively low severity weight of 0.5, it is generally considered a minor health concern under normal exposure.
Health Effects
Consuming water with elevated levels of zinc can cause a noticeable metallic taste. Additionally, exposure to high levels of this contaminant can lead to nausea. No other severe acute health effects are typically associated with this inorganic substance.
How Zinc Gets Into Tap Water
Zinc can enter drinking water systems through several pathways, including natural deposits in the earth. Another common source is the corrosion of galvanized pipes within plumbing systems. It can also be introduced into water supplies via industrial discharge.
How to Remove Zinc From Your Water
If zinc is present in your water supply, it can be addressed using specific treatment methods. Reverse osmosis systems are highly effective at filtering out this inorganic contaminant. Alternatively, ion exchange treatment systems can also be used to reduce zinc levels in drinking water.
Should You Test Your Water?
To check for zinc in your drinking water, you can review your local water utility's consumer confidence report or perform a search on WaterQ. Testing is particularly recommended if you have older galvanized plumbing or suspect industrial activity nearby. You can also look up your local water system on WaterQ or check the Zinc data page for reported levels in your area.
Frequently Asked Questions
Is Zinc dangerous in drinking water?
Zinc is generally not considered highly dangerous at typical levels, as reflected by its low severity weight of 0.5. However, drinking water with high levels of zinc can cause nausea and may impart an unpleasant metallic taste. If you suspect high concentrations, checking your water quality is a prudent step.
How does Zinc get into tap water?
Zinc typically enters tap water from natural geological deposits or the corrosion of galvanized household plumbing. It can also originate from industrial discharge into local water sources.
How can I remove Zinc from my water?
You can remove zinc from your drinking water using treatment systems such as reverse osmosis or ion exchange.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.