I get word of recalls right here on The Straight Dope Message Board.
Case in point: That tuna fish recall from a few months ago. Read about it first right here. (Yes, I had a few cans of just-boughten tuna that were on the recall list!)
That’s a good point. Not all, in fact it might even be a minority of recalls are from the CPSC. So social media and emails from places like Amazon and the manufacturer are ultimately the best sources. But the CPSC tends to deal with serious cases like fire, electrical and choking hazards so it’s worth subscribing to one of their pipelines.