Inorganic Low Risk
Total Hardness
No direct health effects; scaling and soap inefficiency
Sources: Natural mineral deposits, Limestone
Regulatory Limit
Zero EPA Limit (500 mg/L)
*Levels above the EPA limit are considered unsafe.
MCL Value
500 mg/L
Goal (MCLG)
0 mg/L
Violating Systems
0 nationwide
Affected Population
0 estimated
Avg Detected Level
0 mg/L in affected systems
Health Risk Assessment
Exposure to Total Hardness in drinking water is regulated because of its potential to cause no direct health effects; scaling and soap inefficiency. The EPA has set the Maximum Contaminant Level (MCL) at 500 mg/L to protect public health.
Note: Long-term exposure above the MCL can significantly increase health risks.
Detailed Health Effects
No direct health effects; scaling and soap inefficiency
Common Sources
1
Natural mineral deposits 2
Limestone National Overview
Total Tests
0
Violations Found
0
Violation Rate
0%
Treatment Methods
Water softening
Reverse osmosis
Is this in your water?
Find out if your local water system has detected Total Hardness.
Frequently Asked Questions
What is Total Hardness and why is it in drinking water?
Total Hardness is a inorganic contaminant. Common sources include: Natural mineral deposits, Limestone.
What are the health effects of Total Hardness in drinking water?
No direct health effects; scaling and soap inefficiency
What is the EPA limit for Total Hardness?
The EPA Maximum Contaminant Level (MCL) for Total Hardness is 500 mg/L.
How can I remove Total Hardness from my water?
Effective treatment methods for removing Total Hardness include: Water softening, Reverse osmosis.
How do I test my water for Total Hardness?
You can check your water system's annual Consumer Confidence Report for Total Hardness levels, or use a certified home water testing kit. WaterQ provides the latest EPA test data for all public water systems.