# CMAQv5.4 release and NH3 columns in CMAQ

**URL:** <https://forum.cmascenter.org/t/cmaqv5-4-release-and-nh3-columns-in-cmaq/3603>\
**Category:** CMAQ\
**Created:** [October 4, 2022, 6:19pm UTC](https://forum.cmascenter.org/t/cmaqv5-4-release-and-nh3-columns-in-cmaq/3603 "2022-10-04T18:19:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ryan](https://avatars.discourse-cdn.com/v4/letter/r/a8b319/32.png) [@Ryan](https://forum.cmascenter.org/u/Ryan)\
**Post date:** [October 4, 2022, 6:19pm UTC](https://forum.cmascenter.org/t/cmaqv5-4-release-and-nh3-columns-in-cmaq/3603/1 "2022-10-04T18:19:03Z")

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Hi all,  
May I ask whether we have a specific date for the CMAQv5.4 release? Will NH3 columns be included in CMAQv5.4 under the PHOTDIAG files?  
Thanks!  
@hogrefe.christian

Ryan

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**Author:** ![hogrefe.christian](https://avatars.discourse-cdn.com/v4/letter/h/74df32/32.png) [@hogrefe.christian](https://forum.cmascenter.org/u/hogrefe.christian)\
**Post date:** [October 4, 2022, 6:49pm UTC](https://forum.cmascenter.org/t/cmaqv5-4-release-and-nh3-columns-in-cmaq/3603/2 "2022-10-04T18:49:57Z")

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We hope to release CMAQv5.4 within the next few weeks, but we do not yet have a specific date.

There have been no updates to the column variables included in the PHOTDIAG1 file, so NH3 columns will not be included.