Trichloroethylene (TCE)
volatile organic compound
Discharge from metal-degreasing sites and other industrial facilities.
EPA regulatory status
Legal limit (MCL)
0.005 mg/L
Goal (MCLG)
0 mg/L
MCL 0.005 mg/L (5 ppb). MCLG = 0.
Health effects
Long-term exposure is associated with liver problems and an increased risk of cancer.
This is general public-health information, not medical advice — consult your physician with any health concerns.
National violations
51,434
EPA's enforcement data (SDWIS/ECHO) records 51,434 violations of Trichloroethylene (TCE)'s rule nationally.
How to remove Trichloroethylene (TCE)
Frequently asked questions
What is Trichloroethylene (TCE)?
Trichloroethylene (TCE) is a volatile organic compound regulated in US drinking water. Discharge from metal-degreasing sites and other industrial facilities.
What is the legal limit for Trichloroethylene (TCE) in drinking water?
MCL 0.005 mg/L (5 ppb). MCLG = 0.
What health effects does Trichloroethylene (TCE) have?
Long-term exposure is associated with liver problems and an increased risk of cancer.
How many violations of Trichloroethylene (TCE) limits are on record nationally?
EPA's enforcement data (SDWIS/ECHO) records 51,434 violations of Trichloroethylene (TCE)'s rule nationally.
How do I remove Trichloroethylene (TCE) from my water?
Filter technologies certified to reduce Trichloroethylene (TCE) include: activated carbon (NSF/ANSI 53), reverse osmosis (NSF/ANSI 58). Look for a filter independently certified against the specific NSF/ANSI standard for this contaminant — general "reduces contaminants" marketing claims are not the same as a contaminant-specific certification.
Source: EPA National Primary Drinking Water Regulations · Data as of 2026-07-16