Online Services


On the Professional Credential Services link (PCS) you will find all necessary information and requirements for each license online. You can also communicate with PCS through or by calling 1-888-773-9266.


Physical Address

Examination Board of Water and Wastewater Treatment Plant Operators

Calle San José Esq. San Francisco

Diputación Provincial Building

2nd Floor

San Juan, PR 00902-3271


Postal Address

Department of State

Assistant Secretary of Examination Boards

Examination Board of Water and Wastewater Treatment Plant Operators

P.O. Box 9023271

San Juan, PR 00902-3271



Phone: 787-722-2122, Extension # 232



Legal Basis

Law No. 53 of July 13, 1978, as amended.



  • Pedro Lorenzo López

Board Examination Dates

For Board Examination dates and to request the examination, please access the website For more information you can contact the company Professional Credential Services by calling 1-888-773-9266.

All applicants interested in Reasonable Accommodation must apply using the forms established by regulation No. 6463 of May 22, 2002.

Concept Total
Theoretical Examination $100.00
Theoretical Re-examination $100.00


The following subjects shall be multiple choice type examination:

  • Biology
  • Physical Chemistry
  • Public Health
  • Water Treatment Process
  • Laws and Regulations
  • Plant Safety
  • Maintenance
  • Mathematics


The applicant must meet one of the following requirements either by experience or academic qualifications to apply for the examination.

Category Experience Academic Qualifications
Operator I
Operator II
Operator III
Operator IV


Important Notices

  • Regulation No. 6530 of August 2, 2002 for the Certification of Operators of Water and Wastewater Systems and/or Treatment Plants.
  • Regulation No. 6463 of May 22, 2002 for the Evaluation of Reasonable Accommodation.