Bihar Brothers Create Magnetic Filtration System for Arsenic-Safe Water

In a remarkable stride towards public health, brothers Arpit and Abhijeet have developed a magnetic filtration system to combat severe arsenic contamination in Bihar's drinking water. This initiative began as a school project, addressing a critical issue identified by WaterAid India in 2026, which found arsenic levels as high as 704.4 ppb in Bihar’s Simri block, exceeding the safe limit by over 70 times the 10 ppb guideline.

The urgency of their work is underscored by the insidious nature of arsenic, which is tasteless, odorless, and often found in shallow aquifers, leading to severe health consequences like skin lesions and cancers after long-term exposure. Families, such as Durga Yadav's in Bhikchu Ka Dera, have tragically experienced these effects, with her husband and brother-in-law dying of stomach cancer, yet hand pumps remain their only water source. Research indicates a widespread problem, with over 10 million rural residents estimated to be at risk across 11 Bihar districts, where 7,164 out of 66,623 samples showed arsenic levels above 50 µg/L.

The brothers' invention, fostered at Bihar Bal Bhawan Kilkari, employs magnetic filtration technology designed to target arsenic at a molecular level. This innovative approach utilizes magnetic separation, distinguishing itself from conventional methods that rely on consumables or chemicals. Following extensive testing, field pilots conducted in Bhojpur and Buxar successfully reduced arsenic levels to below 2 ppb, a significant achievement validated by the Council of Scientific and Industrial Research (CSIR).

Moving beyond the classroom, their system has now been implemented in various schools and communities. Through their startup, Navmarg Research & Innovation, Arpit and Abhijeet report having delivered 3.19 million litres of arsenic-safe water across 13 different sites. For the brothers, this endeavor has always transcended mere machine building, focusing instead on providing a tangible alternative for families facing the dire reality of poisonous drinking water.

Why it matters: This innovation provides a concrete solution to a widespread health crisis in rural communities.

Editor's note: The draft effectively synthesizes the source material, providing a clear and accurate account of the brothers' innovation and its impact.