Noise Abatement Ordinance
(NAO)

¹ Sta­tion­ary in­stall­a­tions are build­ings, trans­port fa­cil­it­ies, build­ing fa­cil­it­ies and oth­er im­mob­ile equip­ment that gen­er­ate ex­ter­i­or noise dur­ing op­er­a­tion. These in­clude in par­tic­u­lar roads, rail­way in­stall­a­tions, aero­dromes, in­dus­tri­al, com­mer­cial and ag­ri­cul­tur­al in­stall­a­tions, fir­ing ranges and per­man­ent mil­it­ary fir­ing ranges and train­ing grounds.

² New sta­tion­ary in­stall­a­tions also in­clude sta­tion­ary in­stall­a­tions and build­ings whose use has been com­pletely altered.

³ Emis­sion lim­it­a­tion meas­ures are tech­nic­al, struc­tur­al or func­tion­al modi­fic­a­tions to in­stall­a­tions, or meas­ures to re­dir­ect, re­strict or calm the flow of traffic, or struc­tur­al meas­ures along the emis­sion path. The pur­pose of the meas­ures is to pre­vent or re­duce the gen­er­a­tion or propaga­tion of ex­ter­i­or noise.

⁴ Im­prove­ments are emis­sion lim­it­a­tion meas­ures for ex­ist­ing sta­tion­ary in­stall­a­tions.

⁵ Ex­pos­ure lim­it val­ues in­clude im­pact thresholds, plan­ning val­ues and alarm val­ues. These are set ac­cord­ing to the noise char­ac­ter­ist­ics, the time of day and the sens­it­iv­ity to noise of the build­ings and areas to be pro­tec­ted.

⁶ Rooms sens­it­ive to noise are:

a.

rooms in dwell­ings with the ex­cep­tion of kit­chens without din­ing fa­cil­it­ies, wash­rooms and stor­e­rooms;

b.

rooms in in­dus­tri­al build­ings that are reg­u­larly oc­cu­pied by per­sons for sus­tained peri­ods of time, with the ex­cep­tion of those for farm an­im­als and those with high levels of in­dus­tri­al noise.