How New York's Restaurant Inspection Grades Actually Work
The letter in the window is the result of a points system, and points are not all about hygiene.
Restaurants in New York City display a letter grade from the health department. Diners read it as a verdict on cleanliness. It is the output of a points system in which lower is better, and understanding the mechanism makes the letter far more informative.
Points, not stars
Inspectors assess conditions against the health code and assign points for each violation found. More serious violations carry more points. The total determines the grade, with the best grade awarded below a threshold.
Because it is a point total, a restaurant can reach a middling score through one serious problem or several minor ones, and those are quite different situations.
Critical and general violations
Violations are categorised by risk. Those most directly linked to foodborne illness — temperature control, contamination, hygiene practices — carry the greatest weight. Others concern facility maintenance and are counted, but less heavily.
This is why a restaurant can lose points for issues a diner would not consider alarming, and why the specific violations are more informative than the total.
What happens after a poor inspection
An establishment that does not earn the top grade may be re-inspected, and can contest violations at a hearing. During that period it may display a grade pending notice rather than a letter, which is not the same as failing.
Where the detail is
The health department publishes inspection results, including the specific violations cited on each visit, searchable by restaurant. This record is far more useful than the letter, because it shows what was actually found and whether the same problem recurs.
A single bad inspection followed by a clean one describes a problem that was fixed. The same violation across three inspections describes a practice.
How to read it as a diner
Treat the letter as a starting point and look up the record if you care. Pay attention to repeated critical violations, and treat a single incident followed by correction as what it usually is — an ordinary event in a demanding business.