Table 3.

All self-reported actions taken, by Columbia-Measured As level (n=256)

	As Measured by Columbia
Action	10–50 ug/L (N=201) n (%)	51–100 ug/L (N=39) n (%)	>100 ug/L (N=16) n (%)
Installed POE System	11 (5.5%)	7 (18%)	3 (19%)
Installed POU System	65 (32.3%)	20 (51%)	5 (31%)
Switched to Bottled	63 (31.3%)	7 (17.9%)	6 (38%)
Other Mitigation Action	11 (5.5%)	3 (7,7%)	1 (4%)
No Action Taken	63 (31.3%)	4 (10.3 %)	2 (13%)

Percentages add up to more than 100% because some respondents reported taking several actions, i.e. installing a system and switching to bottled water, in response to arsenic.

N, n, number of samples