A new study has put California in the spotlight — and not in a good way. Out of more than 300 major U.S. cities ranked from most to least dirty, four California cities landed in the top 10, including the No. 1 spot.

The ranking comes from LawnStarter , a national lawn care company, which analyzed data from 303 of the country’s largest cities. The study evaluated cleanliness using four key categories: pollution, living conditions, waste infrastructure, and how dissatisfied residents are with their environment.

Metrics included everything from the number of public restrooms and junkyards to population density and average air quality. Each factor was weighted based on its impact on overall cleanliness.

So, which cities are struggling most with grime and grit? Here's what to know about La

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