Chlorite in Drinking Water: Health Risks, Sources, and How to Remove It
Chlorite is an organic contaminant that may be present in public drinking water. The Environmental Agency (EPA) regulates chlorite, setting its Maximum Contaminant Level (MCL) at 1 mg/L. Understanding its presence helps consumers ensure their water meets safety standards.
Health Effects
Exposure to chlorite in drinking water can lead to health concerns such as anemia. Additionally, individuals consuming water containing chlorite may experience nervous system effects. It is important to monitor and limit exposure to avoid these conditions.
How Chlorite Gets Into Tap Water
Chlorite is primarily introduced into drinking water as a byproduct of the water treatment process. It forms when chlorine dioxide is used as a disinfectant to treat water. This disinfection byproduct is managed by public water systems to ensure safe levels at the tap.
How to Remove Chlorite From Your Water
The main method for addressing chlorite in drinking water is by adjusting the disinfection process at the water treatment plant. This is achieved by reducing the chlorine dioxide dose used during water treatment. Controlling this dosage helps maintain chlorite levels below the regulatory limit.
Should You Test Your Water?
Consumers can check their annual Consumer Confidence Report or search the WaterQ database to see if chlorite has been detected in their local water supply. For those using private wells, periodic water quality testing through a certified laboratory can confirm the safety of the water. You can also look up your local water system on WaterQ or check the Chlorite data page for reported levels in your area.
Frequently Asked Questions
Is Chlorite dangerous in drinking water?
Yes, chlorite can be harmful if consumed in concentrations above the standard level. It can cause anemia and has been associated with nervous system effects. Maintaining levels below the regulatory limit helps ensure the water is safe to drink.
How does Chlorite get into tap water?
Chlorite enters tap water as a byproduct when chlorine dioxide is used for disinfecting the water supply.
How can I remove Chlorite from my water?
Chlorite levels are typically controlled at the treatment facility by reducing the dose of chlorine dioxide used during the disinfection process.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.