Bali's Air Through Time.

Pick any combination of sensors. The chart overlays them on the same axes, with the WHO twenty-four-hour guideline drawn in for reference. Tracking begins the day a sensor enters the archive. Sensors that have gone silent are preserved at the bottom of the page.

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PM2.5 — selected stations

Pick stations from the list to chart. Default selection is the three highest current readings with archive data.

§ A — The Archive of Silence

The sensors that used to be listening.

Each card below shows a Bali sensor that reported daily readings until the day it went dark. The historical record is preserved here in full so the silence is not also a deletion.

§ B — Related historical reading

More historical material.

Two other pages on this site also carry long-form historical readings.

Evidence Brief · § VII Kerobokan — 469 days, daily median. The fullest single-sensor record we have, drawn against the WHO guideline and the EPA bands. Now offline since 15 March 2026. Evidence Brief · § VI The two PurpleAir continuities. Klungkung and Jimbaran — together about two years of running data on the south and east coasts. Dispatch · I Two in three days, the daily guideline is exceeded. The narrative reading of the Kerobokan record, with the regulatory context.