There's been so few serious Tritium exposures in humans so we don't know how much it would take to cause serious harm in humans. There have been some limited st

There's been so few serious Tritium exposures in humans so we don't know how much it would take to cause serious harm in humans. There have been some limited studies done on things like yeast and mice which suggest you'd have to ingest an extreme concentration of it to see increases in cancer rates. Here's a chart with various drinking water limits included: https://pbs.twimg.com/media/FplBOWxWAAAT_Jz?format=jpg&name=large https://pbs.twimg.com/media/FplBOWxWAAAT_Jz?format=jpg&name=... Backing study: https://academic.oup.com/jrr/article/62/4/557/6256015 https://academic.oup.com/jrr/article/62/4/557/6256015 > Leaking Tritium in some obscure dose is a problem just because 1. the dose is unknown and 2. we are mostly made of water. NRC regulates and monitors tritium spills quite actively. Here's an excerpt from their page on Tritium: https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/tritium-radiation-fs.html https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/t... > As an example, drinking water for a year from a well with 1,600 picocuries per liter of tritium (comparable to levels identified in a drinking water well after a significant tritiated water spill at a nuclear facility) would lead to a radiation dose (using EPA assumptions) of 0.3 millirem (mrem). That dose is: - at least 2,000 to 5,000 times lower than the dose from a medical procedure involving a full-body CT scan (e.g., 500 to 1,500 mrem from a CT scan) - 1,000 times lower than the approximate 300 mrem dose from natural background radiation - 50 times lower than the dose from natural radioactivity (potassium) in your body (e.g., 15 mrem from potassium) - 12 times lower than the dose from a round-trip cross-country airplane flight (e.g., 4 mrem from Washington, D.C., to Los Angeles and back)