That's a call only you can make but I will tell you that in my life I will err on the side of the child when in doubt.
I have called social services before on behalf of children.
For instance I once phoned an acquaintance about a simple business transaction and the adult was so bombed out of their mind they couldn't have a coherent thought. I knew there was a 3 yr old in the house. I phoned social services.
Social services are obligated to check into any claim of neglect on behalf of a child.
The child is an innocent victim in an addicted home, I consider it abuse.
That's my 2 cents on it.