You walk up to a restaurant and there it is in the window: a big blue A, or a green placard, or a number in the 90s. It feels like a verdict. The place is safe, or it is not. Grab a table.

The card is useful. It is also a lot thinner than it looks. A posted grade is one inspector's scorecard from one visit, filtered through one city's rulebook, frozen at a moment that may be months old. Knowing what the card measures, and what it quietly leaves out, is the difference between reading it and being reassured by it.

A grade is a snapshot, not a trend

Every grade card has a date on it somewhere, usually in small print. That date is the whole story. The inspector walked in, looked at what was happening in the kitchen for an hour or two, wrote up what they saw, and left. The card reflects that window and nothing after it.

Between visits, everything can change. The kitchen manager who ran a tight line can quit. A walk-in cooler can start drifting warm. A new supplier can show up with product that was not handled the way the old supplier handled it. None of that shows on the card until the next inspection, and depending on the city and the restaurant's risk category, the next inspection could be six months to a year away.

The reverse is also true. A restaurant with a B in the window may have failed on a bad day, fixed everything the following morning, and run clean ever since. The card does not know that either. It only knows what it saw.

This is why the single most useful thing you can do with a posted grade is look for the history behind it. One A means little. Three consecutive A grades across two years, with short violation lists each time, tells you the kitchen has a system. One A sandwiched between two closures tells you something different, even though the card in the window looks identical.

What the inspector scored that day

A grade is a math problem. In most letter-grade cities, the inspector logs each violation, assigns it a point value based on severity, adds the points up, and the total maps to a letter. Fewer points means a better grade. In score-based cities the logic runs the other direction (start at 100, subtract), but the idea is the same.

The things that carry the most weight are the ones public health researchers link most directly to foodborne illness. Cold food held above the safe temperature. Hot food held below it. Raw meat stored above ready-to-eat food. Evidence of pests. Hand-washing sinks that are blocked, missing soap, or being used as a dump sink. A food handler working while visibly sick. These are the critical or priority items, and a handful of them can sink a grade on their own.

The lower-weight items are the ones that matter for overall sanitation but are less directly tied to someone getting sick: a cracked floor tile, a missing thermometer in a reach-in cooler, a dumpster lid left open, a light shield missing over a prep table. A restaurant can rack up a long list of these and still hold an A, because individually each one is worth very little.

Knowing this changes how you read a grade. Two restaurants can both hold a B with roughly the same point total. One got there through fifteen minor housekeeping issues. The other got there through two temperature violations on the line and a hand-washing problem. Same letter in the window. Very different kitchens.

What the card leaves out

This is the part most diners never think about. Here is what a grade card, by design, does not show you.

There is one more thing the card omits that people rarely consider: the card is only as accurate as the restaurant's willingness to post the current one. In cities that require posting, most restaurants comply. But a placard that has quietly stayed up past a worse re-inspection, or a card from a previous owner still hanging in a window under new management, is not unheard of. Checking the date on the card against the public record is a thirty-second habit that catches it.

How grading rules differ by city

A grade card only means something inside the rulebook that produced it. That rulebook is local, and the differences are bigger than most people expect.

New York City uses a letter system where the point threshold for an A is fairly tight and inspections come in cycles, with a follow-up visit if the first one does not earn an A. The letter you see may be the result of that second visit. NYC also allows a "grade pending" placard during the appeal window.

Los Angeles County also uses letters, but the underlying score is out of 100 and the letter bands are wider. An A there covers a broader range of underlying scores than an A in New York, so two A cards on opposite coasts are not describing the same thing.

Seattle and King County use color-coded placards (a face-emoji style rating) that reflect a rolling look at recent inspections rather than a single visit. That is closer to a trend than most letter systems, but it also means a single bad day can be smoothed out and a single good day cannot fully rescue a poor stretch.

Florida does not use posted grades at all. The state publishes full inspection reports online and does not require restaurants to display anything. If you are in the Keys or anywhere else in the state and looking for the letter in the window, you will not find one. The information exists, but you have to go get it.

Many other cities and counties use a numeric score out of 100, a pass/fail placard, or nothing posted at all with reports available on request or online. Chains that operate in multiple cities sometimes carry very different visible ratings location to location purely because the grading rules differ.

The practical upshot: never carry your mental model of a grade from one city to another. An A in one place and an A in another are answers to different questions. If you travel, learn the local system for wherever you are eating before you trust the card. We keep city-by-city explainers for the largest systems, and the differences are worth ten minutes of reading.

How to fill in the gaps

None of this means the card is worthless. It means the card is a starting point, and the rest of the picture takes about two minutes to assemble.

Check the date first. If the posted inspection is more than a year old, treat the grade as background noise. Something more recent may exist in the public record even if the window has not been updated.

Pull the actual report. Nearly every city and county with a grading system also publishes the underlying inspection report online. That is where you learn whether the B was floor tiles or cold-holding. The report is the card with the detail restored.

Look at the pattern, not the visit. Scroll back through the last several inspections. You are looking for two things: whether the score is stable or swinging, and whether the same violation keeps showing up. A kitchen that gets dinged for the same cold-holding issue three visits in a row has a broken process, not bad luck.

Weight the critical items. Skim past the housekeeping violations and find the ones about temperature, cross-contamination, hand-washing, and pests. Those are the items that map to actual illness risk. If they are absent, a long list of minor items is a cosmetic problem. If they are present and repeating, a clean-looking dining room does not offset them.

Use your own eyes when you walk in. An inspection is one day. You are there today. Restrooms that are out of soap, a bar rag that has clearly been in use for hours, food sitting out under no heat or ice, staff handling cash and then food without a wash in between. These are the same things an inspector would flag, and you can see most of them from a chair.

Do not over-index on a single bad grade. Restaurants are run by people and people have bad days. A single B or a single re-inspection is not a reason to walk out. A pattern is.

Reading the full report

Once you open an inspection report, it can look like a wall of codes and abbreviations. A few landmarks make it readable fast.

Near the top you will usually find the inspection type: routine, re-inspection, complaint, or pre-operational. Routine is the baseline. A re-inspection means the last visit had problems that needed a follow-up. Complaint means someone called it in.

Then the violation list. Each entry typically shows a code number, a plain-language description, a severity flag (critical, priority, core, or similar, depending on the jurisdiction), and often a note about whether it was corrected on site. Corrected-on-site is a good sign. It means someone in charge fixed the problem while the inspector stood there, which usually indicates a manager who knows the rules and cares about them.

Finally, look for what is not listed. A short report with no critical items is the best thing you can see. Do not go looking for an empty report; even excellent kitchens pick up a minor item or two on most visits. Empty is rare and not required. Short and non-critical is the real target.

If you want to skip the manual digging, that is exactly what FoodCodeScout is built for. It pulls the public inspection history for a restaurant into one place so you can see the grade, the underlying violations, and the trend across visits before you sit down. The card in the window tells you the last thing the inspector concluded. The record tells you whether to believe it.

Check before you eat

Look up any restaurant's real inspection history — free

FoodCodeScout covers 57,000+ restaurants across NYC, Seattle, and LA with real health-department records. Takes 30 seconds.

Search your city →

About the author — Rick Jenkins is the founder of AI Revenue Forge. ARF builds vertical-specific AI virtual receptionists for service businesses in HVAC, dental, medspa, real estate, home health, credit repair, and pawn shops. Headquartered in Charlotte, NC. Part of Jenkins Worldwide Enterprises.