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SDSU

ENS building closed after Legionella pneumonia report

AI-generated · every claim is source-linked
CApublic healthemergency notificationhigh confidence

San Diego State University posted four Urgent updates after a campus community member was diagnosed with Legionella pneumonia. ENS was closed for testing. Later sampling found no L. pneumophila in ENS and a low count on one Annex water line; a 30-day disinfection followed.

Alerts
4
Response
—
Killed
—
Injured
—
Institution
San Diego State University
Public R2 · CA
All SDSU cases →
~37,000 studentsSDSU Alert
Official alert policy
Read when and how SDSU says it will use SDSU Alert: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

4 messages in sequence · 4 verified verbatim

Confirmed wording is transcribed character-for-character from a primary source. Use Verify this quote under each message to open that source in a new tab and compare the text yourself.

INITIAL ALERTEmail
Verified verbatim314 chars
The ENS building is temporarily closed while SDSU’s Environmental Health and Safety investigates a report of a campus community member who has been diagnosed with Legionella pneumonia . Symptoms include cough, fever, shortness of breath, muscle aches and headaches, and the disease can be carried in water systems.
Dual independent fetches 2026-08-17. sha256 f6679df770f2accea7584db3c4d31b4a571f5d2a111a4d7784c7d5b20eb651a6.
Thread checked N/A (official HTML archive).
Not a test: live building closure after a Legionella pneumonia diagnosis.
Confirmed text is the first timed paragraph. Later same-post paragraphs add County HHS coordination, avoid-the-building guidance, and health-advisories links (Cloudflare email protection on the last bullet; not reconstructed).
Distinct incident from 2018-09-28-san-diego-state-university-meningitis-b-outbreak: different disease and year.
UPDATEEmail+4d
Verified verbatim491 chars
The ENS building remains temporarily closed while SDSU’s Environmental Health and Safety investigates a report of a campus community member who has been diagnosed with Legionella pneumonia. No additional cases have been reported, and the university continues to monitor the situation. Until testing is completed and the building is confirmed cleared for reentry, students, faculty, staff and visitors are not permitted to re-enter the building. The estimated clearance date is March 3, 2023.
Same dual fetch. Estimated clearance date March 3.
UPDATEEmail+17d
Verified verbatim487 chars
The ENS building remains temporarily closed while SDSU’s Environmental Health and Safety investigates a report of a campus community member who has been diagnosed with Legionella pneumonia. No additional cases have been reported. Out of an abundance of caution, comprehensive testing by a speciality testing company is ongoing. Until testing is completed and the building is confirmed cleared for reentry, students, faculty, staff and visitors are not permitted to re-enter the building.
Same dual fetch. Typo speciality preserved.
UPDATEEmail+39d
Verified verbatim1242 chars
Comprehensive test results performed by a state-certified, accredited specialty laboratory confirm there is no presence of Legionella pneumophila (L. pneumophila), the bacteria that causes Legionnaires' disease, in the ENS Building. Comprehensive testing was also completed within the ENS Annex, as the Annex is directly adjacent to the ENS Building. Of the locations tested in the Annex, three samples, along a single water line, were found to contain a low number of L. pneumophila bacterial cultures. More detailed testing using DNA sequencing was also engaged to confirm. It is important to note that the water in the main pipelines moves from the ENS building into the ENS Annex, where the pipeline does not enter, or connect to any other university buildings or spaces. This means that the detection of L. pneumophila in the ENS Annex is isolated to the Annex building alone. Out of an abundance of caution, a 30-day disinfection process has begun in both the ENS Building and the ENS Annex. After that time, the ENS Building will then be available for reopening. The Annex will be available for reopening after an additional 14 day waiting period for post-disinfection confirmation sample results to be collected, received, and shared.
Same dual fetch. Not an all-clear: 30-day disinfection still underway.
Message elements

How the first alert is built

To check this alert, SuperGrok Heavy 4.5 (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.

The ENS building is temporarily closed while SDSU’s Environmental Health and Safety investigates a report of a campus community member who has been diagnosed with Legionella pneumonia . Symptoms include cough, fever, shortness of breath, muscle aches and headaches, and the disease can be carried in water systems.

  • Sourcepresent25/25

    Final assessment

    All 25 passes treat SDSU Environmental Health and Safety as source.

    Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.

    See all 25 individual reads
    1. present: SDSU's Environmental Health and Safety is the named campus unit.
    2. present: The notice names SDSU EHS as the investigating unit.
    3. present: Environmental Health and Safety is the official sender-side shop.
    4. present: SDSU is the institution closing ENS.
    5. present: The product is an SDSU Urgent body.
    6. present: Campus identity is SDSU via EHS.
    7. present: The institutional voice is SDSU EHS.
    8. present: SDSU's EHS investigates is the sender frame.
    9. present: The university is the speaker throughout.
    10. present: Official SDSU copy identifies the source.
    11. present: The archive body is an SDSU product.
    12. present: EHS is the campus unit named as investigating.
    13. present: The source is SDSU Environmental Health and Safety.
    14. present: The branded campus SDSU is the sender.
    15. present: SDSU's possessive marks the official unit.
    16. present: EHS is the shop closing the building.
    17. present: SDSU Urgent archive is the official source.
    18. present: The notice speaks as SDSU about ENS.
    19. present: Campus sender is SDSU EHS.
    20. present: The official university notice is from SDSU.
    21. present: SDSU frames the Legionella investigation.
    22. present: The sender of the 9:25 a.m. item is SDSU.
    23. present: SDSU is the institution named in SDSU's EHS.
    24. present: The product is SDSU speaking about a building closure.
    25. present: Official SDSU EHS branding is the source cue.
  • Hazardpresent25/25

    Final assessment

    Every pass marks Legionella pneumonia as the hazard.

    What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.

    See all 25 individual reads
    1. present: It names Legionella pneumonia, a specific disease hazard.
    2. present: The hazard is Legionella pneumonia in a campus community member.
    3. present: Legionella pneumonia is the named health emergency.
    4. present: A Legionella diagnosis is the concrete hazard.
    5. present: The product reports Legionella pneumonia.
    6. present: The disease can be carried in water systems is hazard language.
    7. present: The incident type in the text is Legionella pneumonia.
    8. present: Hazard language is Legionella pneumonia.
    9. present: The notice is about a disease, not weather or crime.
    10. present: Symptoms listed are part of the disease hazard.
    11. present: The body names Legionella pneumonia as the event.
    12. present: Cough, fever, and shortness of breath describe the hazard.
    13. present: The text concerns Legionella pneumonia.
    14. present: Hazard is a waterborne bacterial disease.
    15. present: The notice reports a Legionella pneumonia diagnosis.
    16. present: Legionella pneumonia is explicit hazard wording.
    17. present: The product is a public-health disease notice.
    18. present: A diagnosed case is the hazard trigger.
    19. present: The named threat is Legionella pneumonia.
    20. present: Disease-in-water-systems is the hazard pathway.
    21. present: The body centers on Legionella pneumonia.
    22. present: Legionella is the hazard word used.
    23. present: The event is a Legionella pneumonia diagnosis.
    24. present: Symptoms plus water-system carriage are the hazard.
    25. present: The notice names Legionella pneumonia as the problem.
  • Locationpresent25/25

    Final assessment

    The ENS building is the location.

    Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.

    See all 25 individual reads
    1. present: The ENS building is the named location.
    2. present: ENS is the building being closed.
    3. present: The location is the ENS building on campus.
    4. present: The product locates the closure at ENS.
    5. present: The spatial frame is the ENS building.
    6. present: ENS building is the site under investigation.
    7. present: The affected place is ENS.
    8. present: The notice places the event at the ENS building.
    9. present: The ENS building is the locus.
    10. present: Location language is the ENS building.
    11. present: The site is ENS.
    12. present: The closed building is ENS.
    13. present: ENS is a specific campus building.
    14. present: The text locates the closure at ENS.
    15. present: The named place is the ENS building.
    16. present: The building under investigation is ENS.
    17. present: ENS is the campus site named.
    18. present: The footprint is the ENS building.
    19. present: The closure site is ENS.
    20. present: The ENS building is the only place named.
    21. present: Location is ENS on the SDSU campus.
    22. present: The product names the ENS building twice.
    23. present: ENS is the spatial cue.
    24. present: The investigation is at the ENS building.
    25. present: The site of the temporary closure is ENS.
  • Guidancepresent25/25

    Final assessment

    Temporary closure of ENS is treated as guidance.

    The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.

    See all 25 individual reads
    1. present: The ENS building is temporarily closed is an access instruction.
    2. present: Temporarily closed tells people the building is off limits.
    3. present: The notice tells the community ENS is closed.
    4. present: A building closure is protective guidance.
    5. present: The product directs people that ENS is closed.
    6. present: Closed while EHS investigates is the action cue.
    7. present: The guidance is a building-closed instruction.
    8. present: People are told ENS is temporarily closed.
    9. present: The body includes a temporary-closure line.
    10. present: Stay out of ENS is the implied action.
    11. present: The notice holds the building closed.
    12. present: Temporary closure is the guidance content.
    13. present: The audience is told the building is closed.
    14. present: ENS is closed is a do-not-enter cue.
    15. present: The instruction is that the building is temporarily closed.
    16. present: A closure is the operational guidance.
    17. present: The product's action line is temporary closure.
    18. present: Guidance exists as a building-closed sentence.
    19. present: People should treat ENS as closed.
    20. present: The recommended action is to honor the closure.
    21. present: Temporarily closed is explicit access language.
    22. present: The notice closes ENS as the protective step.
    23. present: Building closed is the stated next step for occupants.
    24. present: The guidance payload is the ENS closure.
    25. present: The product directs people away from ENS by closing it.
  • Timepresent25/25

    Final assessment

    The 9:25 a.m. Feb. 13 stamp is the time element.

    When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.

    See all 25 individual reads
    1. present: The archive stamp 9:25 a.m. on Feb. 13 is the product time.
    2. present: Feb. 13, 2023 at 9:25 a.m. is the timed header.
    3. present: The product is the morning initial on February 13.
    4. present: The Urgent page times this notice at 9:25 a.m.
    5. present: A morning timestamp is attached to this body.
    6. present: The official time cue is 9:25 a.m.
    7. present: February 13 is the incident date on the archive.
    8. present: The product is the 9:25 a.m. item.
    9. present: The clock time 9:25 a.m. is present on the archive header.
    10. present: The notice is explicitly timed on the Urgent page.
    11. present: 9:25 a.m. Pacific is the send time recorded by SDSU.
    12. present: The header carries a time of day.
    13. present: The time element is the 9:25 a.m. stamp.
    14. present: Morning of February 13 is the time frame.
    15. present: The archive dates this product to Feb. 13 at 9:25 a.m.
    16. present: A specific hour and minute are on the archive header.
    17. present: The notice is timed 9:25 a.m.
    18. present: The product header is Feb. 13 at 9:25 a.m.
    19. present: 9:25 a.m. marks when this notice went out.
    20. present: The dated archive page is February 13 2023.
    21. present: The time cue is the 9:25 a.m. label.
    22. present: This is the first timed product on the page.
    23. present: The official stamp is 9:25 a.m.
    24. present: The product is a morning public-health notice.
    25. present: Feb. 13 plus 9:25 a.m. is the time pair on the archive.
  • Impactpresent25/25

    Final assessment

    All 25 passes treat the diagnosed campus community member as impact language.

    What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.

    See all 25 individual reads
    1. present: A campus community member who has been diagnosed is identity and impact language.
    2. present: The text reports a diagnosed person, an impact claim.
    3. present: Diagnosed with Legionella pneumonia is impact wording.
    4. present: A campus community member is an identity class.
    5. present: The product states a person was diagnosed.
    6. present: Impact language is a diagnosed case.
    7. present: The notice asserts a human health impact.
    8. present: Diagnosed is an impact word about a person.
    9. present: A community member is identified as the case.
    10. present: The body includes a diagnosis of a person.
    11. present: Human harm is addressed as a diagnosis.
    12. present: The identity/impact element is the diagnosed member.
    13. present: A named class of person (campus community member) is given.
    14. present: The text reports a person's illness.
    15. present: Impact is stated: a diagnosed Legionella pneumonia case.
    16. present: The notice gives a human health outcome.
    17. present: A diagnosed campus community member is present as a claim.
    18. present: Personal health impact is described.
    19. present: The product answers that someone was diagnosed.
    20. present: Diagnosis language is in the sentence.
    21. present: The impact statement is a confirmed diagnosis.
    22. present: Campus community member plus diagnosed is the impact line.
    23. present: The text includes illness status for a person.
    24. present: Impact on a person is addressed.
    25. present: The diagnosed-member clause is the identity/impact element.

Coded by SuperGrok Heavy 4.5

Systematic AI judgments with visible reasoning, not human-validated codings.

About this analysis
Context

Background

SDSU Urgent archive for a February-March 2023 ENS building closure after a Legionella pneumonia diagnosis.
Analysis

Key Findings

Four official products from closure through Annex-isolated low counts and a 30-day disinfection plan.
Outcome
ENS negative for L. pneumophila. Annex isolated low count. 30-day disinfection begun March 24; ENS then available to reopen.
Provenance

Sources

Every claim on this page is meant to be checkable. Open the links below (and the Verify this quote control under each confirmed alert) to read the original university, news, or archive page yourself. Hostnames are shown so you can see where you are going; archived copies survive when live pages move or disappear. See also our methodology.

  1. Official
Cite this case

Campus Alert Archive. "San Diego State University: ENS building closed after Legionella pneumonia report." Incident of February 13, 2023. Added August 2026. https://campusalertarchive.com/case/san-diego-state-university-ens-legionella-closure-2023-02-13/

Download case JSON

Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.

Tags
public-r2californiasdsupublic-healthlegionella
Added August 2026Updated August 2026Via ingestion