Published research
Sand barriers around latrine pits reduce fecal bacterial leaching into shallow groundwater: A randomized controlled trial in coastal Bangladesh
Pit latrines are a common disposal system for feces in low-income countries, but there are concerns of leaching into groundwater used for drinking. The authors evaluated the effectiveness of a sand barrier around pit latrines to reduce fecal contamination. The data indicates that a sand barrier can modestly reduce the risk.