Disinfectant Low Risk
Chlorine
Eye and nose irritation, stomach discomfort
Sources: Water disinfection
Regulatory Limit
Zero EPA Limit (4 mg/L)
*Levels above the EPA limit are considered unsafe.
MCL Value
4 mg/L
Goal (MCLG)
0 mg/L
Violating Systems
4 nationwide
Affected Population
2.0M estimated
Avg Detected Level
1.9922 mg/L in affected systems
Health Risk Assessment
Exposure to Chlorine in drinking water is regulated because of its potential to cause eye and nose irritation, stomach discomfort. The EPA has set the Maximum Contaminant Level (MCL) at 4 mg/L to protect public health.
Note: Long-term exposure above the MCL can significantly increase health risks.
Detailed Health Effects
Eye and nose irritation, stomach discomfort
Common Sources
1
Water disinfection National Overview
Total Tests
56
Violations Found
4
Violation Rate
7.1%
Top States by Violations
Most Affected Systems
Treatment Methods
Activated carbon filtration
Is this in your water?
Find out if your local water system has detected Chlorine.
Frequently Asked Questions
What is Chlorine and why is it in drinking water?
Chlorine is a disinfectant contaminant. Common sources include: Water disinfection.
What are the health effects of Chlorine in drinking water?
Eye and nose irritation, stomach discomfort
What is the EPA limit for Chlorine?
The EPA Maximum Contaminant Level (MCL) for Chlorine is 4 mg/L.
How can I remove Chlorine from my water?
Effective treatment methods for removing Chlorine include: Activated carbon filtration.
How do I test my water for Chlorine?
You can check your water system's annual Consumer Confidence Report for Chlorine levels, or use a certified home water testing kit. WaterQ provides the latest EPA test data for all public water systems.