Technical and Application Information for Trichloroethylene (TCE)
The Health Based Values (HBVs) for TCE in drinking water are set at levels which pose little or no health risk to people, including the fetus, infants, children, and people with impaired immunity. HBVs account for the different amounts of water people drink and the different sensitivities people have to a chemical following exposure. HBVs are based on current scientific knowledge about TCE and are re-evaluated as new information becomes available.
MDH updated the HBVs for TCE in May 2013 and the new values are summarized below.
Health Based Value (HBV)
|0.4 micrograms per liter (µg/L)||This level protects all people exposed to TCE in drinking water at any time during their life, from conception through old age. This value is based on immune effects.|
|2.0 micrograms per liter (µg/L)||
Protects against cancer for all people who are exposed for an entire lifetime, from conception through old age.
Also protects healthy adults who are only exposed to TCE after age 18.
Protects pregnant women and the developing fetus against heart defects.
The MDH Technical Guidance document for TCE (PDF: 207KB/5 pages) contains a detailed explanation of these values. The guidance is intended to help those who use health-based guidance to make decisions about managing exposures to TCE.
Please also refer to the TCE Toxicological Summary (PDF: 75KB/7 pages), which is also available from the TCE entry in the Human Health-Based Water Guidance Table for a short description of the basis of the MDH guidance.
Other MDH resources for TCE: