OWTS Licensed Professionals
⚠️ OWTS Installer and Designer License Renewals:
Licenses scheduled to expire on December 31, 2026, will be available for renewal in the OWR Online Application Portal in mid-September. DEM is currently finalizing the new online process and will send email notifications when renewals are active in the system. Once launched, licensees will have 90 days to complete their renewal.
Find the latest updates and user guides at dem.ri.gov/owr-portal-guidance or subscribe to our email list to receive them directly in your inbox. We appreciate your understanding and patience as we continue implementing our new system.
The RIDEM OWTS (Onsite Wastewater Treatment Systems) Permitting program licenses five different categories of OWTS Professionals. There are four types of septic designers (Class-I, Class-II, Class-III, and Class-IV) and licensed Installers. An individual seeking to obtain one of these licenses must apply for and pass a written exam, providing they meet the minimum qualifications to apply. Licenses expire every three years and must be renewed upon expiration. Each license type requires a different prerequisite and allows the individual to perform differing septic work. An outline of each category is below, but for more information, visit the Rules and Regulations.
Installers
An Installer’s License authorizes an individual to install, construct, alter or repair an OWTS. Applicants for an Installer’s License will be required to demonstrate possession of and ability to properly use a level or transit and to obtain a passing grade on a written examination.
Class-I Designers
A Class I License authorizes the design of a repair to an OWTS, or any component thereof. A valid Installers license is required to apply.
Class-II Designers
A Class II License authorizes the design of an OWTS repair or OWTS for an alteration to a structure with certain stipulations or a New Building Construction under 900 GPD not requiring certain variances. Registration as a Professional Land Surveyor with the RI State Board of Registration for Professional Land Surveyors is required to apply.
Class-III Designers
A Class III license authorizes the design of any OWTS. Class-III designers no longer need to pass an examination; however, the applicant must still apply for the license and must have be a current Professional Engineer in either Civil or Environmental.
Class IV Soil Evaluator's License
A Class IV license authorizes the performance of soil evaluations. An applicant must prove they meet the eligibility requirements outlined in the Regulations and must separately pass a written and field exam.
Submit Installer Examination and License Applications via the OWR PortalDesigner Exam Study Guides
The following applications and forms have been moved to the OWR Online Application Portal:
- Application for New Designers’ License After Passing Exam (Classes I, II, and IV)
- Self-Reporting CEU Form
Questions?
Contact Jacqueline Kendrick-Tedesco at jacqueline.tedesco@dem.ri.gov.
OWR Application Portal: Find printable guides and resources at dem.ri.gov/owr-portal, or request personalized support by submitting a ticket to dem.ri.gov/owr-portal-ticket. For in-person help getting started using the system, book an appointment at DEM’s Permit Application Center at (401) 537-4014 or DEM.PAC@dem.ri.gov.