Benzene is a petroleum-derived industrial solvent that the EPA regulates tightly — at 0.005 mg/L (5 parts per billion), one of the lower contaminant limits on the books. It's not something you can taste or smell at that level, so testing is the only way to know if it's present.
The EPA's Maximum Contaminant Level (MCL) for benzene is 0.005 mg/L, with a Maximum Contaminant Level Goal of zero — reflecting that there's no level regulators consider fully without risk. It typically enters water supplies from leaking underground fuel storage tanks, industrial discharge, or runoff from a gasoline spill or contaminated site near a well or municipal source.
According to the EPA's own published health effects data, long-term exposure to benzene above the MCL is linked to an increased risk of cancer, along with anemia and decreased blood platelet counts.
Reverse osmosis filtration, using a semi-permeable membrane under pressure, is effective at reducing dissolved organic compounds like benzene from drinking water, giving you a reliable barrier regardless of the exact source.
Learn MoreNote: this is addressed by our reverse osmosis drinking-water system specifically — our whole-house filtration systems are not designed or certified to remove it.
We'll test it for free and show you exactly what a system would remove.
The EPA's Maximum Contaminant Level is 0.005 mg/L (5 parts per billion), with a goal of zero.
Most commonly, leaking underground fuel storage tanks, industrial discharge, or runoff near a gas station or contaminated site.
Not reliably, especially at regulated low levels. A lab water test is the only dependable way to know if it's present.