# PM10 from ISAM results

**URL:** <https://forum.cmascenter.org/t/pm10-from-isam-results/6084>\
**Category:** CMAQ-ISAM\
**Tags:** cmaq-isam\
**Created:** [November 29, 2025, 10:19am UTC](https://forum.cmascenter.org/t/pm10-from-isam-results/6084 "2025-11-29T10:19:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nosha\_assare](https://avatars.discourse-cdn.com/v4/letter/n/ba8739/32.png) [@nosha\_assare](https://forum.cmascenter.org/u/nosha_assare)\
**Post date:** [November 29, 2025, 10:19am UTC](https://forum.cmascenter.org/t/pm10-from-isam-results/6084/1 "2025-11-29T10:19:55Z")

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\*Hi All,

I’ve run cmaq-ISAM v5.4, and when I look into PM10 ISAM results, I noticed that the coarse mode PM is not tracked properly and almost all PM10 contribution comes from PM2.5. I am not sure if I made any mistake in my processing. I’ve attaced the combine file to calculate PM10 species for each tracked emissions. I Use cb6r7\_ae7 mechanism.\*

[SpecDef\_cb6r5hap\_ae7\_aq\_pm10\_UK10.txt](https://forum.cmascenter.org/uploads/short-url/5dnL9EeFHbmpdjLgrmud1fP8sNk.txt) (42.6 KB)

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**Author:** ![nosha\_assare](https://avatars.discourse-cdn.com/v4/letter/n/ba8739/32.png) [@nosha\_assare](https://forum.cmascenter.org/u/nosha_assare)\
**Post date:** [November 29, 2025, 11:50am UTC](https://forum.cmascenter.org/t/pm10-from-isam-results/6084/2 "2025-11-29T11:50:03Z")

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I’ve checked in more detailed, It seems ISAM does not track PMC component for each source as it is not specitated and considered as chemically inert component.