Renfrew Air Quality Index (AQI)

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Renfrew, a town situated in Renfrewshire, Scotland, occupies a strategic position on the River Clyde, approximately 8 miles (13 km) west of Glasgow city centre. Its geography is characterised by relatively flat, low-lying terrain, typical of the Clyde Valley, with an elevation generally below 50 metres. Historically, this accessibility via the river fostered industrial development, and remnants of this legacy remain, influencing the local air quality. The surrounding landscape transitions from urban and suburban areas closer to Glasgow, to more rural farmland and woodland further west and south. This urban-rural gradient is crucial; while Renfrew itself experiences concentrated emissions, it’s also affected by pollutants transported from the larger Glasgow conurbation. The proximity to the Firth of Clyde introduces a maritime influence, with prevailing winds often blowing onshore, potentially carrying pollutants inland. However, the Firth also provides some degree of dispersion. The town’s location within the Central Lowlands of Scotland means it’s sheltered by hills to the north and south, which can contribute to temperature inversions, trapping pollutants near ground level, particularly during colder months. The area’s past as a shipbuilding and manufacturing hub has left a legacy of potentially contaminated land, which can contribute to localised air quality concerns.

Renfrew’s air quality follows a distinct seasonal pattern. Winter (December-February) typically sees the poorest air quality, driven by increased use of domestic heating, particularly solid fuels, combined with colder temperatures and frequent temperature inversions that trap pollutants. Low wind speeds exacerbate the issue. March and April bring a gradual improvement as temperatures rise and heating demand decreases, though occasional cold snaps can reverse this trend. Summer (June-August) generally offers the cleanest air, benefiting from higher temperatures, stronger winds, and greater atmospheric mixing. However, increased road traffic during the tourist season can lead to localised spikes in nitrogen dioxide. Autumn (September-November) sees a deterioration as heating use begins to rise again, and damp conditions can contribute to the formation of secondary pollutants. Fog, common in the Clyde Valley during autumn and winter, further reduces visibility and traps pollutants. Sensitive individuals – those with respiratory conditions, the elderly, and young children – should be particularly cautious during winter months and periods of fog. Avoiding strenuous outdoor activity on high pollution days and monitoring local forecasts are recommended. The spring and summer months are generally the most favourable for outdoor pursuits.