Standards for Mercury

Various laws in Japan regulate and set standards for mercury. The following is a list of relevant, domestic standards:

Types of Standards

Total Hg

Alkyl mercury compounds

Standards for disposal of domestic wastes and industrial wastes in landfill site (leachate-controlled type)


Not to be detected

Standards for discharge of effluent from final landfill site:

a. Hg in effluent

b. Hg in surrounding groundwater



Not to be detected

Not to be detected

Standards for atmospheric emission *1

a. Waste incinerator

b. Incinerator for sludge which contaminated by mercury



Not set

Not set

Standards for working environment

<0.025mg/m3 *2

<0.01mg/m3 *3

*1 Nomura Kohsan has set a voluntary standard of 0.04mg/m3N
*2 Excluding mercuric sulfide (HgS).
*3 Limited to ethyl and methyl compounds.

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