As of July 01, 2026, the average annual salary for Wastewater Engineer in Saint Louis, MO is $50,729, equivalent to $24 per hour, $976 weekly, or $4,227 monthly. These figures, sourced from Salary.com’s real-time job posting scans, highlight competitive earning potential for Wastewater Engineer in cities like San Jose, Santa Clara, and San Francisco.
Annually Salaries for Wastewater Engineer in Saint Louis, MO vary widely, spanning from $41,766 to $59,821. Most professionals fall between the 25th percentile ($46,037) and 75th percentile ($55,488), while top earners (90th percentile) make $59,821 per year. This $9,451 pay gap underscores opportunities for salary growth through certifications, specialized skills like Customer Service or Environmental Science, or targeting high-paying regions like District of Columbia or California.
Location and experience significantly influence earnings. For example, Saint Louis Wastewater Engineer often earn 1.7% lower than national averages. However, Saint Louis currently ranks 484 statewide for Wastewater Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
