# Common culprits if PA pixel turns red in home?

**URL:** <https://community.purpleair.com/t/common-culprits-if-pa-pixel-turns-red-in-home/22391>\
**Category:** General\
**Created:** [October 22, 2025, 10:21pm UTC](https://community.purpleair.com/t/common-culprits-if-pa-pixel-turns-red-in-home/22391 "2025-10-22T22:21:05Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Kieran](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/kieran/32/6220_2.png) [@Kieran](https://community.purpleair.com/u/Kieran)\
**Post date:** [October 27, 2025, 10:19pm UTC](https://community.purpleair.com/t/common-culprits-if-pa-pixel-turns-red-in-home/22391/4 "2025-10-27T22:19:24Z")

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Hi @greil

There are a number of things that can cause a rise in particulate levels indoors. Cooking, mentioned already, can cause elevated levels whether or not you’re using gas appliances. We have a short Q and A that might help you narrow it down: [Indoor Sources of Particulate Matter (PM)](https://community.purpleair.com/t/indoor-sources-of-particulate-matter-pm/8778)

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_[View the full topic](https://community.purpleair.com/t/common-culprits-if-pa-pixel-turns-red-in-home/22391)._