Microbial Medium Risk
Total Coliform
Indicator of potentially harmful bacteria present
Sources: Human and animal waste, Soil erosion, Decaying vegetation
Regulatory Limit
Zero EPA Limit (0 presence)
*Levels above the EPA limit are considered unsafe.
MCL Value
0 presence
Goal (MCLG)
0 presence
Violating Systems
2 nationwide
Affected Population
883,583 estimated
Avg Detected Level
1 presence in affected systems
Health Risk Assessment
Exposure to Total Coliform in drinking water is regulated because of its potential to cause indicator of potentially harmful bacteria present. The EPA has set the Maximum Contaminant Level (MCL) at 0 presence to protect public health.
Note: Long-term exposure above the MCL can significantly increase health risks.
Detailed Health Effects
Indicator of potentially harmful bacteria present
Common Sources
1
Human and animal waste 2
Soil erosion 3
Decaying vegetation National Overview
Total Tests
56
Violations Found
2
Violation Rate
3.6%
Top States by Violations
Most Affected Systems
Treatment Methods
Disinfection
UV treatment
Filtration
Is this in your water?
Find out if your local water system has detected Total Coliform.
Frequently Asked Questions
What is Total Coliform and why is it in drinking water?
Total Coliform is a microbial contaminant. Common sources include: Human and animal waste, Soil erosion, Decaying vegetation.
What are the health effects of Total Coliform in drinking water?
Indicator of potentially harmful bacteria present
What is the EPA limit for Total Coliform?
The EPA Maximum Contaminant Level (MCL) for Total Coliform is 0 presence.
How can I remove Total Coliform from my water?
Effective treatment methods for removing Total Coliform include: Disinfection, UV treatment, Filtration.
How do I test my water for Total Coliform?
You can check your water system's annual Consumer Confidence Report for Total Coliform levels, or use a certified home water testing kit. WaterQ provides the latest EPA test data for all public water systems.