Automobile emissions testing is required in all or part of 33 states to help maintain the federal air quality standard. Areas that were in moderate nonattainment or worse for ozone in 1990 are included in Ohio's E-Check program. These areas include the metropolitan statistical areas of Cleveland and Akron.
Freebase(0.00 / 0 votes)Rate this definition: Alcohol proof. Alcohol proof is a measure of how much alcohol is contained in an alcoholic beverage. The term was originally used in the United Kingdom and was defined as 7/4 times the alcohol by volume.
Hence the word proof. Pure alcohol, like the kind used in laboratories, is 200 proof, being 100 percent alcohol. A combination of half alcohol and half water is scored as 100 proof or 50 percent alcohol. Proof is a measure of alcoholic strength, not necessarily of quality.