| År | Station | Nationell stationskod | Klassificering | Inlet-id | Medel Bensen µg/m³ (MKN=5, Miljömål=1) | Antal dygn | Antal timmar | Tidsupplösning |
|---|---|---|---|---|---|---|---|---|
| 2000 | Timrå | 144 | Urban Background | 153 | 1.93 | 170 | Week | |
| 1999 | Timrå | 144 | Urban Background | 153 | 2.22 | 183 | Week | |
| 1998 | Timrå | 144 | Urban Background | 153 | 2.70 | 183 | Week |