https://en.wikipedia.org/wiki/Tritium
“Health risks[edit]
Tritium is an isotope of hydrogen, which allows it to readily bind to hydroxyl radicals, forming tritiated water (HTO), and to carbon atoms. Since tritium is a low energy beta emitter, it is not dangerous externally (its beta particles are unable to penetrate the skin),[20] but it can be a radiation hazard when inhaled, ingested via food or water, or absorbed through the skin.[21][22][23][24] HTO has a short biological half-life in the human body of 7 to 14 days, which both reduces the total effects of single-incident ingestion and precludes long-term bioaccumulation of HTO from the environment.[23][25] Biological half life of tritiated water in human body, which is a measure of body water turn over, varies with season. Studies on biological half life of occupational radiation workers for free water tritium in the coastal region of Karnataka, India show that the biological half life in winter season is twice that of the summer season.[25]”
There is plenty more useful health/environment information at the link.
Yes there’s information all over the web. The excerpt you provide doesn’t address cummulative exposure. Here’s an excerpt from the web as well (Scientific American):
“Some evidence suggests the kind of radiation emitted by tritium—a so-called beta particle—is actually more effective at causing cancer than the high-energy radiation such as gamma rays, even though skin can block a beta particle.”
https://www.scientificamerican.com/article/is-radioactive-hydrogen-in-drinking-water-a-cancer-threat/
Sadly, as US nuke plants have tritium in the groundwater, the gov/nuke industry is defining hazard downward and in a year or two, will have “Science” to “Prove” that it’s less harmful than milk.
Fukushima’s leaking ground water has not been treated and therefore contains many harmful isotopes like Cesium 137 and Strontium 90 and that flows into the ocean daily and will continue to do so. Perhaps since they are now going to flush the tank water into the ocean, and the tanks were temporary (flimsy and leaking) to begin with, they will no longer treat any water and just let radioactive groundwater flow into the ocean without treating any of it.