Colorado Department of Public Health and Environment

Cyclosporiasis cases have increased in the United States and Colorado, but the Colorado Department of Public Health and Environment (CDPHE) notes these cases are common during summer months. The CDPHE confirmed no deaths in historic data related to the parasitic illness, which causes diarrhea.

The Colorado Department of Public Health and Environment advises residents in Pine Drive Water District and Signal Mountain Ranch to use bottled water due to impacts from the Aspen Acres Fire. Water infrastructure in these communities is affected, prompting the guidance for returning residents.

The CDC and Colorado Department of Public Health and Environment (CDPHE) report cases of cyclosporiasis, an intestinal illness caused by the Cyclospora parasite, with Colorado seeing 90 cases this year (up from 73 in 2025) and Michigan reporting a significant increase to 572 cases as of July 4. The CDPHE notes no outbreak in Colorado, and most cases there are linked to international travel.

Denver was ranked the most polluted major city in the U.S. due to wildfire smoke and elevated ozone levels. An ozone action day alert is in effect for Colorado's Front Range Urban Corridor, with health officials warning against outdoor activity. Seven major wildfires are burning in Colorado, contributing to the pollution.

New data from Colorado's Department of Public Health and Environment shows construction workers have a higher overdose death rate (93.5 per 100,000) compared to other industries (43.5). Factors include long hours, financial stress, job-related injuries leading to painkiller use, and a mental health crisis in a male-dominated field. Industry leaders are promoting peer support programs to address the issue.

The Front Range in Colorado is experiencing smoky skies and air quality alerts due to wildfires on the Western Slope. Residents report health impacts and increased purchases of air purifiers, while authorities warn vulnerable groups about unhealthy conditions. The alert lasts through Tuesday, with businesses like McGuckin Hardware seeing heightened demand for air purifiers during fire seasons.

Wildfires on the Western Slope and Utah border are sending smoke toward Denver, causing unhealthy air quality levels with high ozone and particulates. The Colorado Department of Public Health and Environment warns of health risks, particularly for those with asthma, while the Snyder fire near the Utah border has grown to 28,000 acres and killed three firefighters.

Colorado health officials anticipate a busy season for toxic algae blooms due to warmer temperatures and drought conditions. The blooms, which pose health risks through skin rashes and toxin ingestion, have already led to recreation restrictions at Jackson Lake State Park.

Colorado health officials expect a busy season for toxic algae blooms due to warmer temperatures and drought conditions. The blooms, which can produce harmful toxins, have led to recreation restrictions at Jackson Lake State Park, and the Colorado Department of Public Health and Environment is collaborating with Colorado Parks and Wildlife for monitoring.

GEO Group, a company operating immigrant detention facilities in Colorado, sued the state to block enforcement of House Bill 1276, which mandates health and safety inspections of such facilities. The law, signed by Gov. Jared Polis, requires additional inspections and police training on immigration enforcement compliance. GEO argues the law violates federal preemption and contractual rights under the U.S. Constitution.

A fatal hantavirus case in Colorado has been reported, but officials say it is not linked to a cruise ship outbreak. The Centers for Disease Control and Prevention confirmed no Andes hantavirus cases are related. An adult in Colorado died from the virus.