{ "id": "2024-09-12-university-of-minnesota-duluth-chemical-explosion", "slug": "university-of-minnesota-duluth-chemical-explosion-2024-09-12", "institution": { "name": "University of Minnesota Duluth", "shortName": "UMD", "state": "MN", "type": "public-r2", "alertSystemName": "SAFE-U", "enrollment": 11500 }, "incident": { "date": "2024-09-12", "type": "hazmat", "cleryCategory": "emergency-notification", "resolution": "confirmed-threat", "headline": "Nitric acid spill triggers a lab explosion; three connected buildings evacuated", "headlinePublic": "Nitric acid spill triggers a lab explosion; three connected buildings evacuated", "summary": "At [9:20 AM CDT on September 12, 2024](https://www.thebarkumd.com/news/2024/9/12/nitric-acid-spill-caused-umd-chemical-explosion), a graduate student spilled nitric acid in a basement lab in Voss-Kovach Hall at the University of Minnesota Duluth, triggering a small chemical explosion. UMD pushed a [SAFE-U emergency alert at 9:58 AM CDT](https://www.duluthnewstribune.com/news/local/chemical-explosion-causes-evacuation-at-umd) ordering Voss-Kovach Hall evacuated, followed by a second alert evacuating the connected Engineering and Endazhi gikinoo'amaading buildings because they share a ventilation system. The graduate student was [taken to the hospital with minor injuries](https://kstp.com/kstp-news/local-news/1-injured-in-chemical-explosion-at-umd/), and all three buildings were declared safe and reopened at 3:53 PM CDT.", "outcome": "One graduate student was transported to the hospital with minor injuries from the nitric acid explosion. UMD ordered three connected buildings (Voss-Kovach Hall, Engineering, and Endazhi gikinoo'amaading) evacuated due to a shared ventilation system. Hundreds of students, faculty, and staff were displaced during ongoing classes. Hazmat crews from Duluth Fire and the University responded; buildings were cleared and reopened at 3:53 PM CDT.", "casualties": { "killed": 0, "injured": 1 } }, "alerts": [ { "sequence": 1, "type": "initial", "timestamp": "2024-09-12T09:58:00-05:00", "channel": "sms", "verbatimText": "", "isVerbatimConfirmed": false, "sourceUrl": "https://www.thebarkumd.com/news/2024/9/12/nitric-acid-spill-caused-umd-chemical-explosion", "sourceDescription": "SAFE-U alert text quoted in The Bark UMD student newspaper article on the September 12, 2024 chemical explosion", "annotations": [], "lastUpdated": "2026-08-02" }, { "sequence": 2, "type": "update", "timestampApprox": "Shortly after 9:58 AM CDT on September 12, 2024", "channel": "sms", "verbatimText": "", "isVerbatimConfirmed": false, "sourceDescription": "Reconstructed from WDIO and Bark UMD reporting describing the second SAFE-U alert ordering evacuation of the two adjacent buildings due to shared ventilation", "annotations": [] }, { "sequence": 3, "type": "all-clear", "timestamp": "2024-09-12T15:53:00-05:00", "channel": "sms", "verbatimText": "UMD SAFE-U Alert: Effective immediately, building evacuations are lifted and all campus buildings are open and safe to enter. Check the SAFE-U email for more information. (Alert #4)", "isVerbatimConfirmed": true, "sourceUrl": "https://www.facebook.com/UMNDuluth/posts/umd-safe-u-alert-effective-immediately-building-evacuations-are-lifted-and-all-c/908463307972752/", "sourceDescription": "Official University of Minnesota Duluth Facebook page posting the SAFE-U Alert #4 all-clear verbatim on September 12, 2024", "annotations": [ "Verbatim text from the official University of Minnesota Duluth Facebook page, which posted this SAFE-U Alert as Alert #4, the all-clear issued at approximately 3:53 PM CDT", "The actual text says 'all campus buildings' rather than naming Voss-Kovach Hall, the Engineering Building, and Endazhi gikinoo'amaading individually, a broader-scope all-clear than the individual-building evacuation alerts", "The unusually long evacuation duration reflects the complexity of clearing nitric acid vapors from a multi-building shared-ventilation system" ], "characterCount": 181 } ], "context": "The University of Minnesota Duluth is a [public R2 doctoral university](https://www.d.umn.edu/) with about 11,500 students. On Thursday morning, September 12, 2024, at approximately 9:20 AM CDT, a graduate student in a basement chemistry lab in Voss-Kovach Hall [spilled nitric acid](https://www.thebarkumd.com/news/2024/9/12/nitric-acid-spill-caused-umd-chemical-explosion), causing a small chemical explosion. The student sustained minor injuries and was [taken to the hospital](https://kstp.com/kstp-news/local-news/1-injured-in-chemical-explosion-at-umd/). UMD pushed a [SAFE-U alert at 9:58 AM CDT](https://www.duluthnewstribune.com/news/local/chemical-explosion-causes-evacuation-at-umd) ordering Voss-Kovach Hall evacuated, then a second alert evacuating the connected Engineering Building and Endazhi gikinoo'amaading because they share a ventilation system with Voss-Kovach. Likely [hundreds of people were evacuated](https://www.fox9.com/news/duluth-chemical-explosion-evacuation-1-person-injured.amp) since classes were in session. Duluth Fire's hazmat team responded and worked to ventilate the affected areas. UMD [lifted all evacuations at 3:53 PM CDT](https://www.fox21online.com/2024/09/12/chemical-explosion-at-umd-officials-say-minor-injuries-have-occurred/), about 6.5 hours after the explosion. UMD officials announced an investigation into the incident, which was contained to a small section of one lab.", "keyFindings": [ "The first alert came 38 minutes after the explosion, longer than most active-threat alerts, reflecting the added steps of confirming chemical identity and ventilation contamination in a hazmat response", "The decision to evacuate three connected buildings based on shared ventilation, before contamination was confirmed in the additional buildings, was a precautionary measure given the shared-ventilation risk", "The 6.5-hour evacuation duration reflects the difficulty of clearing nitric acid vapors from a complex shared-ventilation system", "Endazhi gikinoo'amaading is UMD's Indigenous academic center; its inclusion in the alert sequence reflects the integration of newer campus buildings into legacy ventilation systems" ], "sources": [ { "title": "Nitric Acid Spill Caused UMD Chemical Explosion (The Bark)", "url": "https://www.thebarkumd.com/news/2024/9/12/nitric-acid-spill-caused-umd-chemical-explosion", "type": "student-newspaper" }, { "title": "Student sustains minor injuries in chemical explosion at UMD (Duluth News Tribune)", "url": "https://www.duluthnewstribune.com/news/local/chemical-explosion-causes-evacuation-at-umd", "type": "local-media" }, { "title": "U of M Duluth chemical explosion prompts evacuation, 1 person injured (Fox 9)", "url": "https://www.fox9.com/news/duluth-chemical-explosion-evacuation-1-person-injured.amp", "type": "local-media" }, { "title": "One person injured, UMD building and two others evacuated after chemical explosion (WDIO)", "url": "https://www.wdio.com/front-page/top-stories/umd-building-evacuated-after-reported-explosion/", "type": "local-media" }, { "title": "Chemical Explosion at UMD, Campus Buildings Now Safe to Enter (Fox 21 Online)", "url": "https://www.fox21online.com/2024/09/12/chemical-explosion-at-umd-officials-say-minor-injuries-have-occurred/", "type": "local-media" }, { "title": "1 injured in chemical explosion at UMD (KSTP)", "url": "https://kstp.com/kstp-news/local-news/1-injured-in-chemical-explosion-at-umd/", "type": "local-media" }, { "title": "UMD SAFE-U Alert: building evacuations lifted (UMN Duluth official Facebook, Alert #4)", "url": "https://www.facebook.com/UMNDuluth/posts/umd-safe-u-alert-effective-immediately-building-evacuations-are-lifted-and-all-c/908463307972752/", "type": "other" } ], "confidence": "medium", "tags": [ "hazmat", "chemical-spill", "lab-explosion", "minnesota", "public-r2", "evacuation", "shared-ventilation", "nitric-acid" ], "dateAdded": "2026-05-03", "lastUpdated": "2026-08-02", "addedBy": "ingestion" }