Environmental Engineer.
Seattle.
$112,000
median salary, 24% above the national average
$87,000 to $143,000. Updated for 2026.
The numbers.
Everything you need to negotiate with confidence.
Here is what Environmental Engineers actually make in Seattle: $87,000 at the 25th percentile, $112,000 at the median, and $143,000 at the 75th. That is 24% above the national average. Seattle is home to Amazon, Microsoft, and a dense cluster of cloud computing, gaming, and AI companies. The number on your offer letter will depend on what you bring and how you ask.
Salary range
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How Seattle compares
Seattle, WA
$112,000
Cost of living: 24% above average
National Average
$90,000
Seattle is $22,000 above
What you should know
If you are interviewing for Environmental Engineer roles in Seattle, here is what you are walking into. Seattle is home to Amazon, Microsoft, and a dense cluster of cloud computing, gaming, and AI companies. The presence of major tech headquarters drives some of the highest engineering salaries outside the Bay Area. Seattle's job market is particularly strong for cloud infrastructure, machine learning, and enterprise software roles. PE licensure, specialization in water treatment or air quality, and experience with EPA regulatory compliance drive the biggest salary differences. Engineers working on remediation of contaminated sites or in the oil and gas sector earn premiums for hazardous conditions expertise.
Junior Environmental Engineers earn $70,000 to $80,000. Mid-career engineers with PE licensure reach $88,000 to $105,000. Senior Engineers and Project Managers command $105,000 to $130,000, while Principal Engineers and Directors at consulting firms exceed $145,000. In Seattle, those numbers run higher. The cost of living here is 24% above average, and employers adjust to compete.
Base salary is not the full picture. PE-licensed engineers receive immediate salary bumps of 10 to 15%. Annual bonuses of 5 to 12% are typical at consulting firms. Government roles offer pension benefits and strong job security, though base salaries trend 10 to 15% lower than private sector. And on the tax side: washington State has no personal income tax, which significantly boosts take home pay. However, state and local sales taxes are among the highest in the country at roughly 10.25%. When someone quotes you $112,000, ask what the total package looks like. The gap between base and total comp is where real money hides.
On negotiation: Remind employers that no state income tax makes your effective compensation higher. You can accept a slightly lower gross salary and still take home more than in California. The range for Environmental Engineers in Seattle runs from $87,000 to $143,000. That is not a narrow window. Where you land inside it depends almost entirely on whether you negotiate and how well you prepare.
Top industries in Seattle
Negotiating in Seattle
Remind employers that no state income tax makes your effective compensation higher. You can accept a slightly lower gross salary and still take home more than in California.