1 | Career Snapshot (2024–25 U.S.)
- What they do: Hydrologists study the movement, distribution, and quality of water on Earth. They assess floods, droughts, and water quality issues to help governments, communities, and businesses manage this critical resource.
- Average openings/year: ≈ 400
Why demand is rising: Climate change (flood/drought management), population growth, and increased demand for clean water.
2 | Core Responsibilities
| Domain | Key Tasks | Methods & Tools (2025) |
| Water Flow & Quality | Measure streamflow, groundwater, water quality | Remote sensors, GIS, water sampling |
| Flood & Drought Modeling | Predict hydrologic extremes | Hydrologic simulation models (HEC-HMS, SWAT) |
| Environmental Compliance | Support regulatory adherence for water usage & pollution | EPA Clean Water Act, Safe Drinking Water Act |
| Infrastructure Support | Collaborate on dams, levees, water supply systems | Civil & environmental engineering teams |
| Sustainability & Policy | Provide data for water resource planning | State water boards, international water treaties |
3 | Where They Work
- Government Agencies: U.S. Geological Survey (USGS), Army Corps of Engineers, EPA, Bureau of Reclamation
- Private Sector: Engineering firms, utilities, water treatment companies, energy firms
- Research & Academia: University-based hydrology and climate centers
- NGOs & International Orgs: World Bank water projects, UNICEF water programs, International Water Association
4 | Salary Ladder (2025)
| Role Level | Compensation Range |
| Hydrology Technician | $45–60k |
| Hydrologist (Entry-Level) | $65–85k |
| Mid-Level Project Hydrologist | $85–105k |
| Senior Hydrologist / Program Manager | $105–130k |
| Water Resources Director / Policy Lead | $130–160k+ |
5 | Education & Credentials
- Bachelor’s in Hydrology, Geoscience, Environmental Engineering: Entry-level field/lab roles
- Master’s in Hydrology/Water Resources: Typical for applied work & consulting
- Ph.D.: Needed for research, university teaching, and policy leadership
- Certifications: Professional Hydrologist (PH), GIS Certification, HAZWOPER
6 | Core Competencies
- Hydrologic modeling & simulation
- GIS & remote sensing
- Climate impact analysis
- Environmental law & compliance
- Stakeholder communication
7 | Key Trends (2025–2030)
- Flood Risk Planning: Climate-driven floodplain mapping and stormwater management
- Groundwater Depletion: Rising demand for aquifer management
- Water-Energy Nexus: Hydrologists collaborating on hydroelectric and renewable energy projects
- AI & Satellites: Machine learning applied to hydrologic forecasting
- Global Water Scarcity: International projects for water access and sanitation
8 | Potential Hiring Companies & Organizations
- Government: USGS, Army Corps of Engineers, Bureau of Reclamation, NOAA Water Center
- Engineering & Consulting: CH2M Hill, Jacobs, HDR, AECOM
- Energy & Utilities: Duke Energy, Southern Company, regional water utilities
- International Orgs: World Bank, United Nations Water, USAID
- NGOs: International Water Association, Water.org, CARE
9 | Pivot Pathways
| Feeder Role | How to Transition |
| Civil Engineer | Gain hydrology certifications; shift to water infrastructure |
| Environmental Scientist | Specialize in hydrologic modeling and policy |
| GIS Analyst | Apply mapping & spatial analysis skills to hydrology |
10 | Burnout Buffer
- Alternate between field and office assignments
- Join interdisciplinary teams (engineers, policy makers) for variety
- Work on purpose-driven water access projects for motivation
11 | Is This Career Path Right for You?
If you enjoy problem-solving with real-world impact like predicting floods, managing droughts, and ensuring clean water—hydrology offers a deeply rewarding path. If you prefer entirely office-based work, the field component may be a challenge.
👉 Find out free: Take the MAPP Career Assessment to discover if water science matches your motivations.
2025 BLS Salary and Job Outlook
The figures below are U.S. national estimates. Wages refer to May 2025; job growth and annual openings refer separately to the 2025–2035 BLS employment projections.
Hydrologists
Related O*NET occupation: Hydrologists (19-2043.00). BLS reporting code: 19-2043.
- Median wage (May 2025): $96,600 per year.
- Mean wage (May 2025): $103,600 per year.
- 10th percentile wage (May 2025): $64,020 per year.
- 25th percentile wage (May 2025): $77,210 per year.
- 75th percentile wage (May 2025): $122,830 per year.
- 90th percentile wage (May 2025): $153,130 per year.
- OEWS employment estimate (May 2025): 5,850. This estimate excludes self-employed workers.
- Employment in the projections base year (2025): 6,300.
- Projected employment (2035): 6,400.
- Projected employment change (2025–2035): 1.5%.
- Projected annual openings (2025–2035 average): 400. Openings include employment growth and workers leaving the occupation; they are not all newly created jobs.
Wage percentiles describe the distribution of wages, not guaranteed entry-level or experienced-worker salaries. National figures can differ from pay in a particular state, industry, or employer. OEWS wages do not include self-employed earnings. The projections employment estimates use a different coverage basis and may include self-employed workers.
Sources: BLS May 2025 national OEWS wage estimates; BLS 2025–2035 occupational projections, Table 1.2; BLS OEWS coverage and definitions.
