30. Chicago, Illinois
> Total score: 32.16
> Health guideline violations score (0-20): 8.13 – 18th worst out of 70 cities
> Most prevalent contaminant compared to other cities: Bromodichloromethane – 48th worst out of 70 cities
29. San Jose, California
> Total score: 33.58
> Health guideline violations score (0-20): 9.38 – 6th worst out of 70 cities
> Most prevalent contaminant compared to other cities: Strontium – 12th worst out of 70 cities
28. Oklahoma City, Oklahoma
> Total score: 33.93
> Health guideline violations score (0-20): 6.88 – 31st worst out of 70 cities
> Most prevalent contaminant compared to other cities: Total THMs – 10th worst out of 70 cities
27. Columbus, Ohio
> Total score: 34.44
> Health guideline violations score (0-20): 8.13 – 18th worst out of 70 cities
> Most prevalent contaminant compared to other cities: Strontium – 5th worst out of 70 cities
26. Colorado Springs, Colorado
> Total score: 34.50
> Health guideline violations score (0-20): 6.25 – 41st worst out of 70 cities
> Most prevalent contaminant compared to other cities: Chloroform – 10th worst out of 70 cities
