Mercury in Drinking Water: Health Risks, Sources, and How to Remove It
Mercury is an inorganic contaminant that can be found in drinking water supplies. The U.S. Environmental Protection Agency (EPA) has set the Maximum Contaminant Level (MCL) for mercury at 2 μg/L. Because of its potential health risks, managing mercury levels in water systems is an important public health priority.
Health Effects
Consuming water containing elevated levels of mercury can lead to adverse health outcomes. Specifically, exposure to this contaminant can cause kidney damage. Additionally, it is associated with nervous system disorders.
How Mercury Gets Into Tap Water
Mercury can enter drinking water from natural deposits in the earth. It is also released into the environment through human activities. These include coal combustion, mining, and industrial discharge.
How to Remove Mercury From Your Water
Several treatment methods are available to remove mercury from drinking water. Effective options include coagulation/filtration and lime softening. Granular activated carbon systems are also commonly used to treat this contaminant.
Should You Test Your Water?
To verify the levels of mercury in your water, you can check your water utility's annual consumer confidence report or use the WaterQ search tool. If you rely on a private well, periodic laboratory testing is recommended, especially in areas with potential industrial or natural sources. You can also look up your local water system on WaterQ or check the Mercury data page for reported levels in your area.
Frequently Asked Questions
Is Mercury dangerous in drinking water?
Yes, mercury in drinking water can be hazardous. Exposure to this inorganic contaminant can lead to kidney damage and nervous system disorders. Because of these serious risks, water systems are required to keep levels below the established safety standard.
How does Mercury get into tap water?
Mercury enters drinking water sources from natural deposits in the earth. It can also be released into the environment from coal combustion, mining, and industrial discharge.
How can I remove Mercury from my water?
You can remove mercury from your water using certified treatment methods. Effective options include coagulation/filtration, granular activated carbon, and lime softening.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.