Henley’s Air Quality: A Step Forward, But Not Time to Relax

Henley’s Air Quality: A Step Forward, But Not Time to Relax

Many of you will have seen the recent news that air pollution levels in Henley have fallen by almost a third, and that South Oxfordshire District Council has consequently removed the town’s designation as an Air Quality Management Area (AQMA). On the surface, this sounds like cause for celebration — and in some respects it is. But the full picture is more complicated, and Greener Henley believes this is exactly the wrong moment to take our foot off the pedal.

Nitrogen dioxide levels are genuinely lower than when the AQMA was first introduced, and credit is due where it’s deserved. The decline reflects real changes in how we travel and heat our homes: the dramatic fall in coal use, the growth of electric vehicles, more drivers choosing Stop/Start technology, and the town’s 20mph limit all appear to have made a meaningful difference. These are encouraging signs.

Yet the air in parts of Henley remains a health concern. Local hotspots persist — particularly around the town centre bus stop, where buses frequently idle their engines alongside heavy through-traffic. There is a genuine risk that, with the AQMA designation gone, both the District Council and the County Council will quietly deprioritise air quality improvements just as sustained action is still needed. Removing a designation is not the same as solving a problem, and we would not want residents to be misled into thinking otherwise.

The bigger picture: particulates

Nitrogen dioxide, however, is only part of the story. The more serious long-term threat to our health comes from particulate pollution — tiny particles released by diesel engines and, significantly, by the wear of tyres and brakes on every vehicle that passes through our streets. Unlike many pollutants, these carbon-based particles cannot be dissolved by the body (which is over 90% water) and accumulate in our organs over time.

The medical evidence is deeply troubling. Particulates have been found in virtually every part of the human body, and areas with high concentrations see measurably worse outcomes: lower educational attainment in children, and higher rates of heart disease, strokes, and cancer. The World Health Organisation does not set a “safe” threshold for particulate exposure — because the evidence suggests there isn’t one. Their position is unambiguous: zero is the only level consistent with good health.

Henley faces a particular challenge here. The town is prone to temperature inversion events, where pollution becomes trapped and cannot disperse. Fewer HGVs, vans and cars passing through the centre would make the most immediate difference.

The good news is that many of us can act directly. Walking and cycling instead of driving, avoiding engine idling when stationary, and supporting measures that reduce through-traffic all help. If we want our children to breathe clean air on the way to school, the progress made so far should inspire us to go further — not to stop here.

Want to take action? Take a Pledge for the Planet to change the way you travel