Cooked?
A

Mcdonald's #22829

health inspection grade · Walnut · Diamond Bar
😇clean

Is Mcdonald's #22829 clean?

Mcdonald's #22829 is currently Grade A from LA County Department of Public Health, Environmental Health, from an inspection on January 22, 2026. No critical violations were recorded at that visit. On Cooked's ladder that reads clean 😇.

What did inspectors find at Mcdonald's #22829?

These are the violations recorded at the most recent inspection on January 22, 2026, in plain English, with the city's own wording underneath.

When was Mcdonald's #22829 last inspected?

Mcdonald's #22829 has 3 inspections on record going back to March 4, 2024, averaging 95 points.

dateresultscore
January 22, 2026Grade A94 pts
February 14, 2025Grade A97 pts
March 4, 2024Grade A93 pts

Mcdonald's #22829 vs Walnut

Walnut runs 97% clean across 115 tracked restaurants — 112 clean, 3 mid, 0 cooked.

Against the 115 spots Cooked tracks in Walnut, this one comes out cleaner than 33% of them.

Other spots in Walnut

See every restaurant inspection in Walnut →

How Los Angeles grades restaurants

Los Angeles County posts a letter placard in the window, and unlike New York the score runs the friendly way: higher is better. 90 to 100 points earns an A, 80 to 89 a B, and anything below that a C. The county inspects roughly every six months to a year depending on risk, and a failed inspection can close a kitchen until it is fixed. Because LA’s scores are final at the time of inspection — there is no pending window — a letter can be read straight off the score when the placard field is blank.

Source: LA County Department of Public Health, Environmental Health via LA County Open Data. Cooked refreshes this data daily — this listing's most recent inspection is dated January 22, 2026. Inspection results describe one moment in a kitchen's life, not a permanent verdict.

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