David Dickie from Clean Air Henley said the removal of the special measures was “premature” and the AQMAs should remain in place.
He said: “The measurements at the council’s monitoring station in Henley could lead you to assume pollution is no longer a problem in the town but that is just one spot.”
Marta O’Brien, an environmental scientist and air quality researcher with the University of Reading, said better education was needed.
She said local authorities also needed to take more measurements at hot spots like hospitals and schools and at peak times like rush hour.
“Aim at areas with more people, targeted areas and times,” she said.
She said the removal of the AQMAs was “sending the wrong message” by telling people that “the air quality is clean”.
In the UK the the legal annual average limit for nitrogen dioxide pollution is 40 micrograms per cubic metre of air.
O’Brien said she wanted people to have “a better understanding of what air pollution is doing to us”.
She added that the reduction in nitrogen dioxide to the legal limit, did not mean the air was clean.