A report done by the relationship advice site MyDatingAdviser.com looked at the population’s relationship satisfaction by comparing 200 of the largest cities in America. The site created an “Infidelity Index” of these specific cities by cross-referencing data from the U.S. Census Bureau with other metrics. Researchers collected data from four key dimensions: Relationship Satisfaction, Life Satisfaction, Infidelity Intent and Affair Activities.

These four dimensions were then compared to marriage, divorce and separation data from the census. Furthermore, the site evaluated emotional and physical well-being, work environment and community. They also dug into Google search rates for the word “affair” and affair hookup websites such as Ashley Madison.

Here are the 10 most unfaithful cities in the United States:

10. Washington, D.C.

Washington D.C. has a marriage rate of 47 percent and the rate of divorce is 9 percent while the separation rate is 2 percent. The happiness index stands at 42.85 and the Google search interest for an affair stands at 30.78.

9. Atlanta, Georgia

Atlanta is the capital of Georgia with a population of about 6 million people. The marriage rate in the city is 47 percent and the divorce rate is 9 percent and the separation rate is 2 percent. The happiness index stands at 50.36 and the Google search interest for an affair stands at 33.66.

8. Knoxville, Tennessee

The town of Knoxville has a marriage rate of 49 percent, a divorce rate of 11 percent and a separation rate of 3 percent. The happiness index in Knoxville, Tennessee stands at 42.85 and the Google search interest for an affair stands at 30.69.

7. New York, New York

In the city that never sleeps, the marriage rate in New York, New York is 47 percent, with a divorce rate of 9 percent and a separation rate of 2 percent. The happiness index stands at 47.84 and Google search interest for an affair stands at 31.77.

6. Philadelphia, Pennsylvania

In the city founded by William Penn, the marriage rate stands at 46 percent. The divorce and separation rates are 13 percent and 2 percent. The happiness index is 51.72 and the Google search interest for an affair stands at 31.59.

5. Nashville, Tennessee

In the capital city of Tennessee, the marriage rate is 48 percent, the divorce rate is 12 percent and the separation rate stands at 2 percent. The happiness index is 49.00 and the Google search interest for an affair stands at 32.58.

4. St. Louis, Missouri

In St. Louis, the marriage rate is 47 percent, the divorce rate is 9 percent and the separation rate stands at 2 percent. The happiness index is 42.85 and the Google search interest for an affair stands at 32.04.

3. Houston, Texas

In Houston, the marriage rate in the city is 47 percent and the divorce rate is 12 percent and the separation rate is 2 percent. The happiness index stands at 49.00 and the Google search interest for an affair stands at 32.67.

2. Fort Worth, Texas

In Fort Worth, Texas, the marriage rate is 46 percent, a divorce rate of 12 percent and a separation rate of 2 percent. The happiness index stands at 51.46 and Google search interest for an affair stands at 30.96.

1. Dallas, Texas

In a city with more than 6.4 million people, Dallas is the number one least faithful city according to the survey. The marriage rate stands at 47 percent with a divorce and separation rate of 12 and 2 percent. The happiness index stands at 49.00 and the Google search interest for an affair stands at 32.85.