The council’s existing target of 30 µg/m³ was set in 2021, and the authority said it was on track to meet it by the end of this year.
In a report, the council said that air pollution contributed to “millions of deaths and years of healthy life lost each year” around the world.
The council stated its “main priorities” for 2026-2030 were “continuing the reduction of transport emissions”.
It pointed to the traffic filters, workplace parking levy, and the expansion of the zero emission zone, as three schemes led by Oxfordshire County Council that would improve air quality.