Hydrologic technicians collect and analyze water data to help manage and protect water resources. The work is hands-on, outdoor-focused, and you can enter with a high school diploma and on-the-job training. Here is what the role involves and how to get there.
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Hydrologic technicians gather and process data on water systems, including rainfall, stream flow, groundwater levels, and water quality. You work in the field collecting samples and taking measurements, then analyze the data in an office or lab setting. Your work supports hydrologists and engineers who use this information to manage water supplies, predict floods, design water systems, and protect aquatic ecosystems. The role combines outdoor fieldwork with technical analysis and record-keeping.
Core work activities
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Hydrologic Technicians earn a median of $64,790 a year, based on 2025 data from the U.S. Bureau of Labor Statistics. Pay rises with experience, specialty, and location.
The outlook is softer here. Employment is projected to fall 2 percent from 2024 to 2034, though there are still about 400 openings a year from turnover.
Top skills
Knowledge areas
Start with a high school diploma or equivalent. Most hydrologic technician positions require medium-level preparation, which you gain through on-the-job training and entry-level coursework in water science or environmental technology. Some employers prefer candidates with community college coursework in hydrology, environmental science, or a related field. You will learn field sampling methods, data collection equipment, and analysis software on the job. Look for positions with water agencies, environmental consulting firms, or government water resource departments.
Most paths into this career start with a high school diploma followed by on-the-job training, though some employers value community college coursework in environmental science or hydrology. If you are deciding between jumping in directly or taking coursework first, Pathly can map the hydrologic technician path that fits you and work through it with your counselor to find the right starting point for you.
Many hydrologic technicians 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 hands-on work with real-world tools and systems. You like working outdoors, solving practical problems, and seeing the direct results of your effort.
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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).