If you’re in an apartment building, moving to a higher floor would help as it affects the basement and first floor the most.

If you’re in a house, the same mitigations for radon exposure would likely work to reduce TCE as well.

Regularly ventilating your home may also help keep the levels down.

Lastly, there are typically many years of exposure required before you notice any symptoms. So moving would be another viable option.

Open the windows or move. Your tap water is unaffected, you'd have to be on a well to be impacted. But activated carbon water filters work to remove it.