# How are arsenic compounds removed from drinking water?

I used to live near a volcano where the groundwater contains naturally occurring arsenic compound. Since $\ce{As2O3}$, $\ce{As2S3}$, and $\ce{As4S4}$ are predominantly occurring in drinking water, what are the processes for removing them?

• You may find what you need (happy accident!) in the body of this question chemistry.stackexchange.com/questions/472/…. I don't know that it's a duplicate, I'll let the community decide that. – jonsca Jun 16 '13 at 1:58
• (but I wholeheartedly agree with Eric's sentiment below, if you are in fact using this as a method to purify drinking water and not just as a lab exercise, consult an expert in this area for your own safety) – jonsca Jun 16 '13 at 1:59