The county’s new health grading system will rate restaurants on an aggregate score of four recent health inspections.

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Starting this week, residents in West Seattle will get a fresh view into food-safety practices at their local restaurants.

King County public-health officials on Tuesday unveiled newly designed food-safety signs featuring the county’s new health-grading system.

Years in the making, the new grading system will rate the county’s more than 11,000 permanent food businesses based on an aggregate score of four recent health inspections. Under the previous rating system, each restaurant’s health grade was based on a single assessment by county health inspectors.

The new grading system will reflect how a restaurant scored in critical areas such as properly controlling food temperatures and using safe serving practices. Under the new system, zero is a perfect score. A restaurant can be closed if it amasses 90 points or more.

A restaurant may be ranked excellent, good, fair or needs improvement on signs, which feature smiley-face emoji in backgrounds of green, yellow and grey.

Dow Constantine and other county officials unveiled the new signs and final design Tuesday morning at the West Seattle Fish House on 35th Avenue.