I want a better list than the IARC because their Group 1 has substances like benzine and asbestos along side things like Alcoholic beverages, Chinese-style Salted fish and processed meat.
The evidence is very strong for all of those. They should be in Group 1.
I went looking for such a better list. One thing I found is this, for drinking water contaminants:
https://www.sciencedirect.com/science/article/pii/S240584401...
It would be nice to have a list like this for the Group 1 substances, I mean something that shows the amount vs. the risk and the number of cases caused by the substance.
For benzene in drinking water it has 0.15 μg/L corresponding to 10e−6 lifetime cancer risk. Estimated number of cancer cases from benzene in drinking water in the USA is 1 vs. 43500 from arsenic.