ask: When does snoring become worrisome?

According to the Mayo Clinic:
"When to seek medical advice: You may not be aware that you snore, but your bed partner likely is. Seeing your doctor about your snoring can help both you and your partner. For you, snoring may indicate another health concern, such as obstructive sleep apnea, nasal obstruction or obesity. For your partner, your seeking medical advice about your snoring may result in being able to get a restful sleep."

According to the American Academy of Ontolaryngology:
"Forty-five percent of normal adults snore at least occasionally, and 25 percent are habitual snorers. Problem snoring is more frequent in males and overweight persons, and it usually grows worse with age. Snoring is an indication of obstructed breathing. Therefore, it should not be taken lightly."

Snoring (and any health behavior, for that matter) is a problem when it negatively impacts another person, and medically, it is probably depriving your husband of appropriate rest and sleep patterns.

To answer your question, it seems like a visit to the doctor's office may not be a bad idea, as snoring increases with age.

Lastly, the funny-named "Snore Score" from the American Sleep Apnea Association may provide some information for you, regarding what is considered problem snoring (being tired upon waking, gasping for air during sleep, etc).

The warning signs for problem snorers increases if your husband is overweight or has high blood pressure.