Bhut Jolokia comes in at 1,001,304 Scoville heat units, a measure of hotness for a chili. It is nearly twice as hot as Red Savina, the variety it replaces as the hottest.
By comparison, a New Mexico green chili contains about 1,500 Scoville units; an average jalapeno measures at about 10,000.
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Note: The "grand daddy" of hot chilies, the Orange Habanero pepper, can pack a punch of up to 350,000 Scoville Units.