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Existing Septic System Report (ESER form) - Oregon.gov - oregon 2026

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The document is an Existing System Evaluation Report for Onsite Wastewater Systems issued by the Oregon Department of Environmental Quality. It outlines a comprehensive form for septic system owners to provide essential information regarding their wastewater treatment systems, including details about the system's components, inspection results, and maintenance records. The report emphasizes the importance of accurate data collection during inspections and includes sections for general system information, septic tank condition, dosing tank status, soil absorption system evaluation, sand filter assessment, alternative treatment technology details, and a plot plan sketch. It serves as a guideline for inspectors to assess the functionality and compliance of onsite wastewater systems in Oregon.

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Click ‘Get Form’ to open it in the editor.
Begin by filling out the 'Septic System Owner-Provided Information' section. Enter the property owner's name, telephone number, site address, and legal description. Ensure all fields are completed accurately.
Proceed to 'General System Information'. Check all applicable types of septic systems present and provide details such as permit number and installation date.
In the 'Overall Septic System Status' section, answer questions regarding sewage discharge and backups. Provide additional comments if necessary.
Continue through each section, including 'Septic Tank', 'Dosing Tank / Pump Basin', and 'Soil Absorption System', ensuring you check boxes and provide measurements where required.
Finally, review your entries for accuracy before signing at the end of the form. Attach any required documents as specified in the instructions.

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