Effective microorganism (EM)

"EM water" dispersing service (EM사랑지킴이 사업단)

"Effective Micro-organism" or "EM" refers to 80 kinds of micro-organisms that are known for their effectiveness in cleaning water, preventing rust, and decomposing organic matters. Since 2012, older persons are hired to spray "EM water" inside toilets and faucets inside public organizations, schools, shopping street, etc, three times a week. The regional government receives requests from around 170 public buildings in Incheon City and assigns older persons to work in the buildings.

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