In 2015, the San Antonio Metropolitan Health District adopted new Texas Food Establishment Rules to add additional inspection categories to the food establishment inspection form. To improve the transparency of the inspection report, Metro Health transitioned from the previous demerit scoring scale in which “0” is considered a perfect score, to a 100-point system where a perfect score is “100”. This change to the scoring system makes restaurant scores easier to understand by the general public. An establishment with a score between 90 and 100 receives a grade of "A" under the current rules.
See NEISD Health Inspection Scores(PDF)