When it comes to urban living, not all cities shine equally. A 2025 study by LawnStarter ranked 300 US cities based on pollution, waste infrastructure, housing conditions, and resident dissatisfaction, uncovering some surprising results. Each city was given a score out of 100.
From industrial hubs with smoggy air to fast-growing suburbs struggling with waste management, the dirtiest cities aren’t always the ones you’d expect. Some score poorly due to inadequate infrastructure, while others reflect deep-rooted environmental challenges.
Click on to discover the top 30 dirtiest cities in the US in 2025.