Table 1.

Drinking water arsenic contamination exposure

Arsenic level (ppb)	Wells % above 2000a	Households % above levelb 2009	Households % above levelc 2012	Male youths % above leveld 2006
10	48	32	24.8	62
50	25	13.4	12.5	34
100	16	6.2	–	18
200	9	3.4	2.8	8
300	5.1	1.8	–	2

ppb parts per billion

^aSource: [27], Table 6.7

^bSource: [7], Table 1

^cSource: [29], Table WQ.2

^dAuthors’ calculations from 2006 MICS and NHS data