Arm 1: All participants receive pitcher filter and three replacement filters

Table-top water pitcher filtration system

Changes in water arsenic concentrations from baseline to week 4

Changes in urinary arsenic concentrations from baseline to week 4

Number of participants who receive the water pitcher filtration system among all eligible individuals and demographics

Number of participants using the filtration system after receiving it; number of participants who intend to use the system after the study period ends; and demographics of participants who used the filtration system during the study period or intend to use it after the study period ends

% of participants who adhere to the intervention during the intervention period (Fidelity), including using the pitcher filtration system for all drinking and cooking water and changing filter cartridges as recommended (measured by questionnaire: at home, did you use the pitcher filtration system for all of your drinking water, more than half of your drinking water, half of your drinking water, less than half of your drinking water, or none of your drinking water AND did you use did you use the pitcher filtration system for all of your cooking water, more than half of your cooking water, half of your cooking water, less than half of your cooking water, or none of your cooking water)

% of participants who continue to use the pitcher filtration system during the 8-week sustainability period when replacement filter cartridges are no longer provided (measured by questionnaire: at home, did you use the pitcher filtration system for all of your drinking water, more than half of your drinking water, half of your drinking water, less than half of your drinking water, or none of your drinking water AND did you use did you use the pitcher filtration system for all of your cooking water, more than half of your cooking water, half of your cooking water, less than half of your cooking water, or none of your cooking water)