View source for Noise Regulations in Portland Oregon

==Maximum Permissible Sound Levels==
The general sound levels in Portland, as measured at the property line of the receiving property, are as follows: 

{|
|Source Zone
|Receiver Zone
|Day Hours (7 a.m. - 10 p.m.)
|Night Hours (10 p.m. - 7 a.m.)
|-
|Residential
|Residential
|55 dBA
|50 dBA*
|-
|Commercial
|Residential
|60 dBA
|55 dBA*
|-
|Industrial
|Residential
|65 dBA
|60 dBA*
|}