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)

<0.005mg/L

Not to be detected

Standards for discharge of effluent from final landfill site

  a. Hg in effluent

  b. Hg in surrounding groundwater

<0.005mg/L

<0.0005mg/L

Not to be detected

Not to be detected

Standards for atmospheric emission

  a. Waste incinerator

  b. Incinerator for sludge which contaminated by mercury

50μg/Nm3

100μg/Nm3

Not set

Not set

Standards for working environment

<0.025mg/m3 *1

<0.01mg/m3 *2

*1 Excluding mercuric sulfide (HgS).
*2 Limited to ethyl and methyl compounds.