Region | Site | Units | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Portland Metro | Portland SE Lafayette | ppb | 8.4 | 6.9 | 5.6 | 4.9 | 3.8 | 3.3 | 2.9 | 2.5 | 2.2 | 2.3 | 4.8 | 7.5 | 10.7 | 14 | 17.3 | 20.2 | 22.1 | 24.7 | 21.9 | 19.2 | 16.4 | 13.1 | 9.4 | 6.2 |
Portland Metro | Tualatin Bradbury Court | ppb | 3.9 | 3.2 | 1.9 | 1.5 | 1.2 | 1.1 | 1 | 1.1 | 1.3 | 2.3 | 4.2 | 6.8 | 9.9 | 13.2 | 16.2 | 19.1 | 20.8 | 20.2 | 18.3 | 15.9 | 12.9 | 9.7 | 6.7 | 3.8 |