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 | 3.4 | 3.3 | 3.3 | 3.3 | 3.2 | 2.9 | 2.4 | 2.3 | 2.3 | 2.4 | 2.6 | 2.9 | 3.5 | 4.1 | 4.7 | 4.9 | 5 | 4.9 | 4.8 | 4.7 | 5.3 | 6 | 5.6 | 5.5 |
Portland Metro | Tualatin Bradbury Court | ppb | 2 | 1.6 | 1.6 | 1.6 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 2 | 2.4 | 2.6 | 2.6 | 2.6 | 2.5 | 2.4 | 2.2 | 1.9 | 1.5 | 1.3 |