Landscape Certifications

Certified Landscape Water Manager

Certification gives you a competitive edge. Become a certified landscape water manager and:

  • Add instant credibility with customers and employers.
  • Increase job opportunities.
  • Demonstrate your commitment to efficient water management.

CLWM Overview

CLWMs evaluate, operate, manage and improve landscape irrigation systems to achieve the highest level of water conservation possible. CLWMs:

  • Evaluate site conditions and determine water availability and use requirements.
  • Have working knowledge of general irrigation theory, including hydraulics, soil-plant-water relationships, water requirements and electricity principles.
  • Understand irrigation equipment selection, use, restrictions and installation methods.
  • Identify and implement system upgrades and modifications, and manage the control system to provide the most efficient irrigation possible.
  • Provide direction to the end users on system use, scheduling, maintenance and water conservation.

Becoming a CLWM

To become a CLWM, you must:

  1. Register for the exam. Minimum requirements: three years of work experience in an irrigation-related field and a CLIA or CGIA certification in good standing.
  2. Pass the landscape water manager exam. The 4-hour exam includes 150 equally-weighted, multiple choice questions on estimating water requirements and use, soil-plant-water relationships, water sources, hydraulics, sprinkler layout and zoning, scheduling, auditing, system maintenance and economics.
  3. Comply with the Code of Ethics. 
  4. Remain in good standing. CLWMs must submit 20 continuing education units per 2-year cycle.

CLWM Exam Fees

IA Member  Nonmember 

Landscape Water Manager Exam Fee 



Exam Retake Fee 



Annual Renewal Fee (one certification) 



Annual Renewal Fee (two or more certifications) 




See the Certification Candidate Handbook for exam policies, procedures and fees outside of North America.