Part D Parameters relevant for the risk assessment of domestic distribution systems

United Kingdom

Parameter	Parametric value	Unit	Notes
Legionella	< 1 000	CFU/l	This parametric value is set for the purposes of Articles 10 and 14. Actions provided for in those Articles could be considered even when the value is below the parametric value, e.g. in cases of infections and outbreaks. In such cases, the source of infection should be confirmed and the species of Legionella should be identified.
Lead	10	μg/l	This parametric value is set for the purposes of Articles 10 and 14. Member States should use their best endeavours to achieve the lower value of 5 μg/l by 12 January 2036.

Parameter

Parametric value

Unit

Notes

Legionella

< 1 000

CFU/l

This parametric value is set for the purposes of Articles 10 and 14. Actions provided for in those Articles could be considered even when the value is below the parametric value, e.g. in cases of infections and outbreaks. In such cases, the source of infection should be confirmed and the species of Legionella should be identified.

Lead

μg/l

This parametric value is set for the purposes of Articles 10 and 14.

Member States should use their best endeavours to achieve the lower value of 5 μg/l by 12 January 2036.