Contaminant Guide
Chlorine in Your Tap Water
Chlorine keeps water safe in transit from the utility, but reacts with organic matter to form trihalomethanes (TTHMs) — disinfection byproducts with long-term health implications.
Key Facts
- • EPA maximum residual disinfectant level for chlorine: 4 mg/L
- • The EPA regulates TTHMs and HAA5 as disinfection byproducts in drinking water
- • Chlorine residual is a common cause of taste and odor complaints at the tap
- • The EPA identifies activated carbon as a treatment technology for chlorine and its byproducts
- • Chlorine levels at the tap vary with season, distance from the plant, and line flushing
The Solution
Whole-house and under-sink activated carbon filtration are commonly used to address chlorine taste and odor. ClearFlow tests your water and sizes a system for your home; reduction performance is defined by the manufacturer's published specifications.
Get Free TestChlorine in Tap Water — FAQ
Municipal utilities add chlorine to kill bacteria and viruses during water distribution. The smell is normal, but it indicates the presence of chlorine and its byproducts at your tap.
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