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Spill Investigation

Environmental Incident Reports

Spill Investigation Program


North Dakota spill incident reports are available in two databases depending on when the incident occurred.


2021 to present

Incidents reported since January 1, 2021 are managed through HazConnect, North Dakota's Unified Spill Reporting System. The public access tool lets you search and view reported incidents by location, date, material type, and responsible party.

Incident Reports 2021 to Present


1975 to 2020

Two separate databases cover this period because incidents were reported to different agencies before the unified system launched in 2021.

General Incidents — Spills reported to DEQ. Includes non-oilfield incidents such as chemical spills, transportation accidents, and other environmental releases.

 General Incidents 1975 to 2020

Oilfield Incidents — Spills reported to the Oil and Gas Division. Covers oilfield-specific releases including crude oil, brine, and produced water.

 Oilfield Incidents 1975 to 2020

How to use the 1975 to 2020 databases

  • Click any Incident ID to open the full summary report as a PDF in a new window.
  • Use the Search box at the top of the table to find incidents by any field — location, company name, material spilled, or incident number. Only matching records will be shown. Clear the search box and click Search again to return to all records.
  • Click any column header to sort results in ascending or descending order.
  • Use the First / Previous / Next / Last buttons to navigate between pages, or type a page number into the box and click Go.

 Download instructions as PDF


About this data

Before 2021, environmental incidents in North Dakota were reported to three separate agencies: the Department of Emergency Services, DEQ, and the Oil and Gas Division of the North Dakota Industrial Commission.

General incidents were reported to DEQ. Oilfield incidents were reported to the Oil and Gas Division, which maintained that data independently. DEQ had read-only access to a portion of that data and made it available to the public as received.

When the Unified Spill Reporting System launched on January 1, 2021, historical records were not migrated. The 1975 to 2020 databases remain available here and continue to be updated for incidents that were still active at the time of the transition.