As of June 01, 2026, the average annual salary for Wastewater Engineer in Illinois is $53,511, equivalent to $26 per hour, $1,029 weekly, or $4,459 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 Illinois vary widely, spanning from $44,055 to $63,103. Most professionals fall between the 25th percentile ($48,562) and 75th percentile ($58,532), while top earners (90th percentile) make $63,103 per year. This $9,970 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, Illinois Wastewater Engineer often earn 1.9% higher than national averages due to demand from Fortune 62 companies. However, Illinois currently ranks 14 nationwide for Wastewater Engineer job salary. Professionals are advised to focus on high-growth sectors like to offset market challenges.
