Hydrologists study water systems and solve problems tied to water quality, availability, and movement. The work is research-driven and analytical. You will need a master's degree and strong skills in math and science to enter the field.
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Hydrologists analyze data about water in the environment. You collect and interpret information from job sites, laboratories, and computer models to understand how water moves through soil and rock, how it affects ecosystems, and how human activity impacts water resources. Your work involves critical thinking and problem-solving as you document findings, process complex information, and make decisions about water management, contamination, and conservation. You spend time both in the field and working with computers.
Core work activities
Career video courtesy of CareerOneStop.
Hydrologists earn a median of $96,600 a year, based on 2025 data from the U.S. Bureau of Labor Statistics. Pay rises with experience, specialty, and location.
The outlook is modest. Employment is projected to grow 0 percent from 2024 to 2034, little or no change for all occupations, with about 500 openings a year.
Top skills
Knowledge areas
You will need a master's degree to work as a hydrologist. This requires extensive preparation, typically starting with a bachelor's degree in a related field like geology, environmental science, or engineering. During your studies, you will build knowledge in mathematics, physics, engineering, and geography. You should develop strong skills in critical thinking, science, reading comprehension, and writing. Many hydrologists complete internships or research projects during their education to gain practical experience before entering the field.
Most hydrologists earn a master's degree after completing a bachelor's program. The path takes time, so weighing your timeline and financial goals matters. Use Pathly can map the hydrologist path that fits you to map out the steps with your counselor and build a plan that fits your situation.
Many hydrologists must be licensed, and professional certifications can strengthen your resume.
Common certifications
Licensing is handled at the state level and the requirements vary, so check the licensing board in your state. Pathly shows your state's specific steps inside your roadmap.
You are drawn to investigative work. You enjoy analyzing complex data, solving problems through research, and understanding how systems work. This career rewards curiosity and precision.
Reading about a career is the easy part. Turning it into a plan is where most students get stuck. Pathly takes you from curious to a clear next step, and gives your counselor the insight to champion you along the way.
Start with a quick quiz and assessments that surface your personality, your EQ, and what really motivates you, so your next steps are built around who you actually are.
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Last updated July 1, 2026.
Data sources. Career details from the O*NET 30.3 Database by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under CC BY 4.0. O*NET® is a trademark of USDOL/ETA. Salary and outlook figures from the U.S. Bureau of Labor Statistics (May 2025 wages; 2024–2034 projections), delivered via the CareerOneStop API. Certification, licensing, wage, and outlook data from CareerOneStop, sponsored by USDOL/ETA and the Minnesota Department of Employment and Economic Development (DEED).