Noise Regulations in Portland Oregon
From hmis
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* |