# DDM for CMAQ 5.3?

**URL:** https://forum.cmascenter.org/t/ddm-for-cmaq-5-3/1249
**Category:** CMAQ
**Created:** [January 21, 2020, 10:24pm UTC](https://forum.cmascenter.org/t/ddm-for-cmaq-5-3/1249 "2020-01-21T22:24:43Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![msospedra](https://avatars.discourse-cdn.com/v4/letter/m/ac91a4/32.png) [@msospedra](https://forum.cmascenter.org/u/msospedra)
#### Post date: [January 21, 2020, 10:24pm UTC](https://forum.cmascenter.org/t/ddm-for-cmaq-5-3/1249/1 "2020-01-21T22:24:43Z")

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Hi,

Will DDM be implemented in CMAQ 5.3 any time soon?

Marc

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### Author: ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)
#### Post date: [January 27, 2020, 3:50pm UTC](https://forum.cmascenter.org/t/ddm-for-cmaq-5-3/1249/2 "2020-01-27T15:50:33Z")

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Hi Marc,

DDM for CMAQ version 5.3.1. is currently in development. I don’t have a target date for you, but the gas-phase part in currently in code review and the particulate part will follow shortly after.

Sergey

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### Author: ![msospedra](https://avatars.discourse-cdn.com/v4/letter/m/ac91a4/32.png) [@msospedra](https://forum.cmascenter.org/u/msospedra)
#### Post date: [January 28, 2020, 3:19pm UTC](https://forum.cmascenter.org/t/ddm-for-cmaq-5-3/1249/3 "2020-01-28T15:19:25Z")

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Thanks for the update!