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State of Rhode Island, Department of Environmental Management ,
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  1. Home
  2. Environmental Protection Bureau
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  • Environmental Protection Bureau
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    • Acting on Climate Change
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      • Online UST Registration
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      • Underground Storage Tank Management Program
      • Red Tagged USTs (Delivery Prohibition)
      • UST Class A/B Certified Operator Training
    • Waste Facilities Management Program
      • About the Waste Facilities Management Program
      • Inactive Landfill Closure
        • Former Truk-Away Landfill
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    • State Site Clean Up
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        • 6-10 Connector Project
        • Bay Spring Realty Company
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          • FAQs: NetDMR
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      • OWTS Professional Licensing
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        • Continuing Education Opportunities
        • Groundwater Table Adjustment Factors
      • Wastewater Operator Certification
      • Shellfish Harvester Education & Certification
    • Research & Monitoring
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        • Closures or Conditionally Approved Areas
        • Shellfish Maps
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        • Safe Shellfish Consumption
        • Shellfish Harvester Education
        • Marine Fisheries Topics
        • Shellfish Water Quality Staff
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      • Surface Water Quality
        • Surface Water Monitoring
        • Lake, Pond and Reservoir Monitoring
        • River and Stream Monitoring
          • Ambient River Monitoring
          • Biological Monitoring in Rivers and Streams
        • Bay Assessment & Response Team - BART
          • Rhode Island Bays, Rivers, and Watersheds Coordination Team
      • Restoration Studies & TMDL Program
        • TMDL Background Information
        • Rhode Island's TMDL Program - One Step to Cleaner Waters
        • Rhode Island Statewide Bacteria TMDL
        • TMDL and Water Quality Restoration Study Documents
        • Integrated Water Quality Monitoring and Assessment Reports
      • Narraganset Bay Assessment & Response Team (BART)
        • Bay Water Quality Report
        • Fixed-Site Monitoring Stations and Data in Narragansett Bay
          • Monthly Graphs
          • Fixed-Site Monitoring Stations Network Data
        • Monitoring and Investigation Procedures
        • Reports from Prior Bay Incidents
        • Hypoxia (Low Oxygen) and Anoxia (No Oxygen)
        • Sea Lettuce (Ulva lactuca)
        • BART Contact Information
      • Aquatic Invasive Species
        • Aquatic Invasive Animals
        • Aquatic Invasive Plants
        • Aquatic Invasive Species Response
        • Harmful Algal Blooms (HABs)
        • Invasives (CRMC)
      • Cyanobacteria (Blue-Green Algae)
      • Impact of Climate Change to RI Wastewater Systems Study
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        • Introduction to Narragansett Bay
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      • Groundwater / Wellhead Protection
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        • Onsite Wastewater Treatment Systems
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        • Vernal Pools
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    • Financial Assistance
      • Clean Water SRF Loans
      • Nonpoint Source Funding
      • Wastewater Treatment Facility Resilience
      • Boat Pump-out Grants
      • Narragansett Bay and Water Restoration Fund (BWRF) and federal Nonpoint Source (NPS) Funds Grant Awards
      • Flood Prevention
      • Community Septic System Loans (CSSLP)
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      • Additional Financial Assistance Programs
    • Outreach & Education
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          • What is Stormwater?
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          • Related Websites
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OWTS Study Guides and Application Forms

Study Guides

  • Class I
  • Class II
  • Class IV
  • Rules Establishing Minimum Standards Relating to Location, Design, Construction and Maintenance of Onsite Wastewater Treatment Systems (OWTS) 250-RICR-150-10-6
  • OWTS Program Exam Schedule

Application Forms

  • Application for a New OWTS License (Class I, II, IV)
  • Class I and II Designers Exam Application
  • Class IV (Soil Evaluators) Exam Application
  • Installers Exam & License Application
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Office of Water Resources OWTS Program

235 Promenade Street
Providence, RI 02908-5767
Phone: (401) 222-3961
DEM.OWTS@dem.ri.gov

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