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| Region | Site | Units | 8-Hour | Hour Of Day | 1-Hour | Hour Of Day |
|---|---|---|---|---|---|---|
| Willamette Valley | Eugene Amazon Park | ppb | ||||
| Willamette Valley | Eugene Saginaw | ppb | ||||
| NE Oregon | Hermiston Municipal Airport | ppb | ||||
| Portland Metro | Portland SE Lafayette | ppb | 18 | 01 AM | 19 | 10 AM |
| Willamette Valley | Salem State Hospital | ppb | ||||
| Portland Metro | Sauvie Island | ppb | ||||
| SW Oregon | Talent | ppb | ||||
| Portland Metro | Tualatin Bradbury Court | ppb | 12 | 03 AM | 14 | 01 AM |
| Willamette Valley | Turner Cascade Junior HS | ppb |
