Intervention
The community-led SHWS program includes a community water arsenic testing program, two distinct household-level health communication programs (SHWS mobile health (mHealth) & filter arm vs. SHWS intensive arm), and provision of a POU arsenic filter faucet (for all households). The SHWS mHealth & filter arm program provides households with a POU arsenic filter faucet and 3 calls to promote filter use and maintenance at 2 weeks and 3 and 5 months after filter installation by a community promoter. The SHWS intensive program provides the same filter, as well as 3 phone calls and 3 Facebook messages at 2 weeks and 3 and 5 months after filter installation, and 3 in-person home visits at 1 week, 1 month, and 6 months after filter installation by a community promoter. Comprehensive descriptions of the study intervention and COVID-19 related changes have been published elsewhere (George et al. submitted).