Question:
want to tell us how many died needlessly because the high arsenic levels caused cancer, junior? Under the limits that the dimwit wants to establish, one person out of a hundred will get cancer when there water supply has an arsenic level close to the limit.

Cancer risks from arsenic in drinking water: implications for drinking water standards.

Smith AH, Biggs ML, Moore LE, Haque R, Steinmaus C, Chung J, Hernandez AL, and Lopipero P.

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For lifetime consumption of inorganic arsenic in drinking water containing around 500 ug/L, it is estimated that on the order of 10% of all deaths in adults would be attributable to ingestion of arsenic, mainly as a consequence of lung and bladder cancer. This extremely high cancer mortality risk estimate is based primarily on

Answer: Cancer risks from arsenic in drinking water: implications for drinking water standards.

Smith AH, Biggs ML, Moore LE, Haque R, Steinmaus C, Chung J, Hernandez AL, and Lopipero P.

read this:

For lifetime consumption of inorganic arsenic in drinking water containing around 500 ug/L, it is estimated that on the order of 10% of all deaths in adults would be attributable to ingestion of arsenic, mainly as a consequence of lung and bladder cancer. This extremely high cancer mortality risk estimate is based primarily on investigations in Region II of Chile, but is also supported by studies of other exposed populations, particularly Taiwan. Linear risk extrapolation from 500 ug/L to lifetime consumption of water with an arsenic concentration of 50 ug/L, the current drinking water standard, results in cancer mortality risk estimates reduced by a factor of ten to around 1 in 100 adult deaths being attributable to arsenic