California rice is the cleanest. Looks like we should always buy white basmati from California, India and Pakistan. Letting rice sit overnight in water and then rinsing good helps lower arsenic content.
Our latest tests determined that the inorganic arsenic content of rice varies greatly depending on the type of rice and where it was grown. White basmati rice from California, India, and Pakistan, and sushi rice from the U.S. on average has half of the inorganic-arsenic amount of most other types of rice.
All types of rice (except sushi and quick cooking) with a label indicating that its from Arkansas, Louisiana, or Texas or just from the U.S. had the highest levels of inorganic arsenic in our tests. For instance, white rices from California have 38 percent less inorganic arsenic than white rices from other parts of the country.
Brown rice has 80 percent more inorganic arsenic on average than white rice of the same type. Arsenic accumulates in the grains outer layers, which are removed to make white rice. Brown has more nutrients, though, so you shouldnt switch entirely to white. Brown basmati from California, India, or Pakistan is the best choice; it has about a third less inorganic arsenic than other brown rices.
Rice thats grown organically takes up arsenic the same way conventional rice does, so dont rely on organic to have less arsenic.
https://www.consumerreports.org/cro/magazine/2015/01/how-much-arsenic-is-in-your-rice/index.htm