Mercury

Mercury and its compounds

CAS: 7439-97-6Category: MetalsDirective: EU 2026/805 Annex VI

Compliance target22 December 2033

Environmental Quality Standards

Water EQS

Values in μg/L (micrograms per litre)

AA-EQS — Inland waters	—
AA-EQS — Coastal & transitional	—
MAC-EQS — Inland waters	0.07 μg/L
MAC-EQS — Coastal & transitional	0.07 μg/L

Matrix: biota

11 μg/kg ww

22 December 2033

●uPBT — reduced monitoring frequency permitted (guideline: ≥ every 3 years)
●Requires biota or sediment monitoring in addition to (or instead of) water measurements

Structure, physicochemical properties, and EU regulatory data

EQS values from Directive (EU) 2026/805 Annex VI.

Last verified: June 2026