Radiological Protection Ordinance
(RPO)

¹ Yearly av­er­age air­borne activ­ity con­cen­tra­tions in ac­cess­ible loc­a­tions off-site must not ex­ceed the im­mis­sion lim­its for air (LIA) spe­cified in An­nex 7.

² Weekly av­er­age activ­ity con­cen­tra­tions in pub­licly ac­cess­ible wa­ters must not ex­ceed the im­mis­sion lim­its for wa­ters (LIW) spe­cified in An­nex 7.

3 It must be ad­di­tion­ally en­sured that am­bi­ent doses due to ex­tern­al ra­di­ation in dwell­ings, pub­lic-ac­cess build­ings and work­places are kept at such a low level that, tak­ing in­to ac­count res­id­ence time and all oth­er ex­pos­ure path­ways, they can­not lead to ex­ceedance of the dose lim­its for mem­bers of the pub­lic.