Camden · historical monitoring
Air-quality evidence,
frozen in time.
This bounded archive contains 89,755 published observations from four Camden monitoring sites. Coverage ends on 16 December 2021: it must not be read as current air quality or personal exposure advice.
Monitoring locations
Different site types answer different questions
Roadside, kerbside and urban-background monitors should not be compared as if their settings were identical.
How to compare the archive
Keep pollutant, monitor and period consistent
A roadside monitor and an urban-background monitor describe different settings, even when their readings cover the same day.
Compare like with like: the same pollutant, monitoring site, averaging period and season. Gaps in this archive mean “not recorded”, not clean air, and totals partly reflect how often each site reported. Use the archive to study historical patterns or frame further questions. For present conditions, health advice or an exposure decision, consult a current official monitoring service because this dataset ends in December 2021.