$PPM
Carbon dioxide in the air at Mauna Loa
426
ppm in Sep 2026
Quiet. 426 ppm in Sep 2026.
From Oct 2024 to Sep 2026.
How it is counted
Normal425.92 to 429.62
Highest432.34May 2026
Unusual months0
- Counts
- The monthly mean of carbon dioxide in the air at Mauna Loa Observatory, Hawaii, in parts per million, as NOAA's Global Monitoring Laboratory publishes it: built from daily means and centred on the month. From December 2022 to July 4 2023, after the Mauna Loa eruption, the readings come from Maunakea, 21 miles north; NOAA fills a month with too few days by interpolation and the number is printed as NOAA gives it. Counted from January 2010.
- Why it is here
- The air has more carbon dioxide every year than the year before, and it swings with the seasons on the way up.
- Cadence
- Monthly. NOAA posts a month in the first weeks of the next; the month prints when it is in the file. Newest complete month Sep 2026. Read Nov 13, 07:40 UTC.
- Baseline
- The prior 24 months, 12 needed.
- Notice
- Data: NOAA Global Monitoring Laboratory, Mauna Loa Observatory (Lan, Tans and Thoning).
Quote this number
Carbon dioxide at Mauna Loa averaged 426.07 parts per million in Sep 2026, according to NOAA figures kept by Tickerz.
Asked often
- What is the CO2 level at Mauna Loa this month?
- The air at Mauna Loa held 426.07 parts per million of carbon dioxide on average in Sep 2026, as NOAA's Global Monitoring Laboratory measures it.
- Where does the $PPM number come from?
- Tickerz reads it from NOAA Global Monitoring Laboratory, Mauna Loa CO2 monthly mean (co2_mm_mlo.csv). Monthly. NOAA posts a month in the first weeks of the next; the month prints when it is in the file. Each number is kept as it was first published, with a timestamped proof, and any later revision is shown beside it.
- Can I download the $PPM data?
- Yes, free and with no key: the full history as JSON at https://tickerz.com/api/indices/ppm and every period as CSV at https://tickerz.com/api/indices/ppm/history.csv.
List it
No listing kit for $PPM yet. A kit sets its strikes from 14 published numbers. This index publishes one a month and has none yet.
Resolution
- Index
- $PPM Carbon dioxide in the air at Mauna Loa. Rulebook v0.2, 2026-10-04.
- Prints
- Monthly. NOAA posts a month in the first weeks of the next; the month prints when it is in the file. The newest complete month is on the record after the daily proof at 12:40 UTC.
- As first published
Sep 2026 is not timestamped yet. The daily proof at 12:40 UTC adds it.
The number as first published is final for settlement. A revision by the source is shown beside it and never replaces it.
- Fallback
- A month prints when NOAA's file has it and stays open until then. If the file's newest month is more than 45 days past its end, the read fails. A month NOAA never posts is void.
- Precision
- Parts per million to two decimals, as NOAA prints it.
- Cost to move
- Not possible from outside the laboratory.
- Grade
- reference. The longest running record of carbon dioxide in the air, from a US government laboratory. NOAA can revise the newest months by a few hundredths; the record keeps the revision.
- For a rulebook
- Settle on the number Tickerz first recorded for $PPM for the month named in the contract, published at tickerz.com/x/ppm and in GET /api/indices/ppm, timestamped daily in Bitcoin with OpenTimestamps.
As first published
None on file yet.
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<iframe src="https://tickerz.com/embed/ppm" title="$PPM on Tickerz" width="480" height="200" style="border:0;max-width:100%" loading="lazy" allow="clipboard-write"></iframe>Proof and data
- Proof
- Every reading is timestamped in Bitcoin once a day, so nobody can change it later. The newest proof covers Nov 12, in Bitcoin block 975,557.Proof fileLive feedHow it works
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