Compared to the other cities in Washington and cities in all other U.S. states, how safe is Mattawa, WA? From the gauges displayed above, you will notice that Mattawa, WA has been ranked safer than 95% of other cities in the state of Washington. In addition, Mattawa, WA is safer than 85% of cities in the entire United States. To achieve these results, all Washington and United States cities were analyzed to determine how many locations had a lower crime rate than Mattawa, WA. By studying this data, it was possible to determine that Mattawa, WA is above average in safety when compared with other United States cities.