The fact that Marijuana Use in California is Legal does not mean that it cannot create a risk of harm to your children. (In re Alexis E. (2009) 171 Cal.App.4th 438, 452) 

That is, even legal use of Marijuana can be abuse if it presents a risk of harm to your kids. (Amy P. v. Jonathan P., 2022 Cal. App. Unpub. LEXIS 7432) 

If you are a Parent and you smoke Marijuana, you may run afoul of CPS if you do the following: 

1. You regularly smoke Marijuana in front of your children forcing them to ingest second hand smoke. (In re Alexis E., supra, 171 Cal.App.4th at p. 452.) 

2. You store your Marijuana within reach of your children. Doing so could place your children at risk. (See In re Yolanda L. (2017) 7 Cal.App.5th 987, 993, 212 Cal. Rptr. 3d 839 ["Leaving drugs or drug paraphernalia within [children's] reach is an example of negligent conduct that will support section 300, subdivision (b) dependency jurisdiction."].)