SmogRank / Basildon / Carlisle
Basildon vs Carlisle: PM2.5 compared
Over the last year, Basildon's PM2.5 was about 1.7× Carlisle's: it averaged 10.1 µg/m³ against 6.1, on the 304 days both cities were measured. Basildon had the dirtier air on 247 of those days, Carlisle on 56. Basildon was over the WHO's daily guideline of 15 µg/m³ on 38 of them, Carlisle on 4.
Right now
The last year, day by day
Month by month
Year by year
| Year | Basildon | Carlisle | Days Basildon was worse |
|---|---|---|---|
| 2026 so far | 10.5 | 6.2 | 189 |
| 2025 | 11.4 | 6.6 | 277 |
Means in µg/m³, as in the chart above, over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Basildon
- 26 Jan 202612344.3 µg/m³
- 23 Mar 202611842.6 µg/m³
- 9 Mar 202611139.4 µg/m³
Carlisle
- 21 Mar 20269331.7 µg/m³
- 22 Mar 20267220.3 µg/m³
- 20 Mar 20266818.3 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Basildon
Side by side with Grays (the nearest), Kasur (the world's worst on 30 days).
Carlisle
Side by side with Newcastle upon Tyne (the nearest), Kasur (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Basildon and Carlisle, 14 Oct 2025 – 13 Oct 2026, smogrank.com/compare/gb-basildon/gb-carlisle (accessed 14 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-14 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.