Denver COVID-19 Outbreaks

*In an effort to consolidate public health functions for Denver, many public health programs including COVID-19 disease surveillance are set to be transferred to the Denver Department of Public Health and Environment (DDPHE) on September 30, 2021. At that time, all COVID-19 data for cases, hospitalizations, deaths, and testing will be removed from this page. The Public Health Institute at Denver Health (formerly Denver Public Health) will continue to provide data and surveillance for COVID-19 vaccinations through December of 2021.*

Denver Department of Public Health & Environment (DDPHE) and Denver Public Health (DPH) are collaborating with local businesses, organizations, and community partners to investigate and control COVID-19 outbreaks. Outbreaks are clusters of COVID-19 cases that appear related to a single workplace, business, school, facility, or event. Learning from and controlling outbreaks helps us slow the spread of COVID-19.

In the dashboard below you will find information about outbreaks and the number of cases involved in COVID-19 outbreaks in Denver since the start of the pandemic. This information is updated weekly on Wednesday afternoon, and mirrors information available in CDPHE’s public COVID-19 outbreak data page. Numbers may differ slightly from CDPHE based on the timing in which the dashboard is updated.

When would COVID-19 cases be classified as an outbreak?

Confirmed outbreak:

  • Two or more people who are confirmed cases of COVID-19 in a workplace/facility or with a common exposure, with symptom onset or test collection date (if asymptomatic) within 14 days OR
  • One confirmed and two or more probable cases of COVID-19 in a workplace/facility, with onset or test collection date (if asymptomatic) within 14 days.
    • See below for additional information about case and outbreak definitions.

Case and Outbreak Definitions

Report a COVID-19 Outbreak

Additional information for facilities in the “COVID-19 Outbreak Resources & Guidance” section below.

COVID-19 Outbreak Resources and Guidance for Facilities/Businesses

Report a COVID-19 Outbreak

Please click the link to report a suspected outbreak of COVID-19 in a Denver workplace or organization and we will review the information submitted. After review, you or the workplace will be contacted by a representative within 48 hours to discuss next steps. We are unable to respond to incomplete reports so please be sure to complete the information in the survey as completely and accurately as possible. Long-term care facilities (Nursing Homes, Assisted Living Facilities, etc.) should send an email directly to to report any cases or outbreaks in your facility instead of using the survey above.

Workplace Outbreak Guidance

Please visit the Colorado Department of Public Health & Environment’s COVID-19 Workplace Outbreak Guidance site for in-depth information and resources related to managing a COVID-19 outbreak.

Please note an outbreak determination does not necessarily mean all cases acquired their illness in that specific workplace/facility. It is possible that a case may have been exposed elsewhere (we can rarely prove where any individual was exposed with a person-to-person pathogen). But when a case worked/spent time in a workplace/facility with a known outbreak, we attribute their illness to that outbreak even if there is no definitive proof that the case acquired the illness there. This conservative approach is consistent across all outbreak types.

After A Suspected Outbreak is Reported

Once a confirmed or suspected outbreak is reported, a representative from DDPHE or DPH will be assigned as the main point of contact to provide resources and collect information. If the facility/workplace is located in another county, we will forward the information provided to that county for follow-up. It may take up to 48 hours for a public health representative to contact you once a possible outbreak has been reported at your facility due to the timing in which the report was received and current staff capacity.

While you are waiting for public health follow-up, please see the recommended steps below:

  1. Using the appropriate line list template, please begin recording information about your staff, guests, or residents that have developed COVID-19-like symptoms or who have tested positive for COVID-19.
  2. Ensure that any staff, guests, or residents who are currently ill or tested positive for COVID-19 are isolating according to public health isolation guidelines.
  3. Ensure that any staff, guests, or residents who were in close contact with a confirmed or probable COVID-19 case are quarantining according to public health quarantine guidelines.
  4. Reference CDPHE’s workplace guidance for initial recommendations regarding cleaning and disinfection, testing, and maintaining a healthy work environment.
  5. If you have employees that need to take time off work due to COVID-19 illness or exposure, please reference the Families First Coronavirus Response Act page for information for your business about the law regarding this time off.
  6. If you have questions or need assistance with COVID-19 testing, please visit DDPHE’s testing pages or Denver Public Health's testing page or for more information.
  7. If you have questions or need assistance with COVID-19 vaccination, please visit DDPHE’s vaccination page for more information.
  8. For general questions about COVID-19, you can call CO HELP at 1-877-462-2911 or 303-389-1687.

When is a COVID-19 outbreak considered over?

A COVID-19 outbreak is typically considered resolved when:

  • 28 days have passed since the symptom onset date (or test collection date, if asymptomatic) of the last newly identified COVID-19 case.

Public Health Orders

For information on public health orders currently in effect in Denver and Colorado, please visit the Colorado Department of Public Health & Environment’s Public Health and Executive Orders page or the Denver Department of Public Health & Environment’s Public Orders page.