# Denver Air Quality Update: June 7, 2025

The air quality in Denver today is showing mixed conditions across different pollutants. As of this morning, no Ozone Action Day Alerts are in effect for the Front Range Urban Corridor, which includes Denver[1].

For today, June 7, particulate matter (PM2.5) levels are expected to improve to the Good category, following yesterday's Moderate readings that reached an Air Quality Index (AQI) of 54[1][2]. The I25GLO ambient monitor in Denver Metro currently shows an AQI of 54[2].

Ozone concentrations are forecasted to be in the Good to Moderate range today. Health officials recommend that people who are unusually sensitive to ozone should consider reducing prolonged or heavy outdoor exertion between noon and 8 pm[1].

Both Carbon Monoxide and Nitrogen Dioxide concentrations are expected to remain in the Good category throughout the day, while visibility is predicted to be Good to Moderate[1].

Denver's geography makes it particularly susceptible to air quality issues. Located at the foot of the Rocky Mountains, the city is prone to temperature inversions where warm air traps cooler air near the ground, preventing pollutants from dispersing into the atmosphere[5]. This phenomenon contributed to Denver's historical air quality challenges, including the infamous "brown cloud" that plagued the city from the 1970s into the early 1980s when the area exceeded EPA air quality standards nearly 200 days annually[5].

Health experts warn that ground-level ozone can cause acute respiratory problems and trigger asthma attacks. During periods of elevated pollution, residents are advised to avoid rigorous outdoor activity during the heat of the day, as prolonged exposure can potentially cause lasting damage to lungs[1].

For real-time updates on Denver's air quality conditions, residents can check official monitoring websites maintained by Colorado's Department of Public Health and Environment.

Denver's Air Quality Update: June 3, 2025

The air quality in Denver today is showing favorable conditions, continuing a trend from yesterday. According to the latest reports, ozone concentrations are expected to be in the Good category today, following yesterday's Good to Moderate range[1]. This indicates minimal health concerns for the general population.

Particulate Matter (PM2.5) levels are also expected to remain in the Good category today, with yesterday's highest reading at 40 AQI, recorded by the ADB ambient monitor[1]. Other pollutants including Carbon Monoxide and Nitrogen Dioxide are similarly forecasted to remain in the Good category[1].

Denver's geographical location at the foot of the Rocky Mountains creates unique air quality challenges. The city is prone to temperature inversions where warm air traps cooler air near the ground, preventing pollutants from dispersing into the atmosphere[4]. This phenomenon contributed to Denver's historical air quality issues, including the infamous "brown cloud" that plagued the city from the 1970s into the early 1980s when the area exceeded EPA air quality standards nearly 200 days annually[4].

Today's favorable air quality represents significant progress from those days, thanks to ongoing efforts by organizations like the Regional Air Quality Council, which collaborates to improve air quality through planning, policy development, and program implementation[5].

For residents planning outdoor activities today, conditions are ideal with minimal restrictions needed. Unlike yesterday, when those unusually sensitive to ozone were advised to consider reducing prolonged outdoor exertion between noon and 8 PM[1], today presents no specific limitations for outdoor activities.

The Environmental Quality Division continues to monitor industrial, manufacturing, and commercial air pollution sources throughout Denver to ensure compliance with regulations that protect public health[4]. This ongoing vigilance helps maintain the improved air quality that Denver residents are enjoying today.

Denver's Front Range Kicks Off Summer 2025 Ozone Season

Today marks the official start of the Summer 2025 Ozone Action Day Alert Program in Denver and the Colorado Front Range region. As of June 1, 2025, the Colorado Department of Public Health and Environment and the Regional Air Quality Council have begun their seasonal monitoring program that will run through August 31[1][3].

Currently, there are no air quality advisories in effect for the Denver-Boulder metropolitan area and the Front Range Urban Corridor, which extends from Douglas County north to Larimer and Weld counties, including Fort Collins and Greeley[1][4].

The most recent air quality measurement from early this morning showed a highest AQI value of 50 for Ozone, which indicates Good air quality conditions[1]. This represents favorable breathing conditions for all residents, including sensitive groups.

For those concerned about air quality, the state has implemented a notification system where residents can subscribe to receive daily forecasts for ozone pollution throughout the season. These forecasts are available in both English and Spanish on the division's website[3].

On days when ozone levels are predicted to exceed the National Ambient Air Quality Standards, an Ozone Action Day Alert will be issued. These alerts serve as important public health notifications, especially for vulnerable populations including those with respiratory conditions, the elderly, and children.

The Regional Air Quality Council, which collaborates on these efforts, focuses on improving air quality while protecting Colorado's health, environment, and economy through various planning and program implementations[5].

The summer ozone season follows the conclusion of the Winter 2024/2025 High Pollution Advisory Program. The winter advisory program will resume on November 1, 2025[1].

For those traveling or planning outdoor activities today, conditions appear favorable with good air quality, though residents are encouraged to check daily forecasts as summer temperatures rise and ozone levels typically fluctuate.

Today, air quality across Denver is in the Good to Moderate range. Ozone concentrations are expected to remain at levels generally considered safe for the public. However, individuals who are unusually sensitive to ozone are advised to consider reducing prolonged or heavy outdoor exertion, particularly during the afternoon and early evening hours between noon and 8 pm. Fine particulate matter is also forecast to be in the Good to Moderate category, meaning air quality is still acceptable for most people, but those who are especially sensitive to particle pollution should take similar precautions by minimizing vigorous outdoor activity.

Other common air pollutants, including carbon monoxide and nitrogen dioxide, are predicted to remain in the Good category, posing minimal risk to the general population. Visibility throughout Denver and the greater Front Range area is expected to be Good to Moderate. No official Air Quality Action Day has been declared, indicating there are no heightened health concerns for the general population and no mandatory pollution restrictions in place.

These daily air quality forecasts are part of Colorado’s efforts to keep residents informed, especially during the annual ozone pollution season, which runs from May 31 to August 31. During this time, heightened attention is paid to ozone levels because warm, sunny conditions can spur the formation of ground-level ozone, particularly on hot summer days. Residents who are interested can subscribe to receive daily forecast emails from Colorado’s Air Pollution Control Division for real-time updates and health guidance throughout the season.

Overall, today’s air quality is generally safe for outdoor activities for most people, but those who are unusually sensitive to ozone or particulate matter should monitor symptoms and limit heavy outdoor exertion as needed. Anyone experiencing difficulty breathing or throat irritation should consider reducing time outdoors and seek guidance from health professionals if symptoms persist. Denver continues to monitor air quality closely to ensure residents stay informed and healthy during the ozone season[1][2].

Today in Denver, air quality levels are drawing attention as conditions are rated in the Poor category, signaling concerns particularly for sensitive groups including children, people with asthma, and the elderly. Throughout the day, the Air Quality Index indicates that pollution levels are high enough that individuals who are unusually sensitive may experience symptoms like throat irritation or difficulty breathing. For these groups, health officials recommend reducing time spent outdoors or avoiding prolonged exertion outside, especially between noon and 8 pm when ozone concentrations tend to rise to their highest levels of the day[5][1].

Ozone pollution is a primary contributor today, with concentrations expected to range from Good to Moderate, but peaking enough to warrant precaution for vulnerable populations[1]. Fine particulate matter readings are also in the Good to Moderate range, adding to the cumulative effect on air quality. Carbon monoxide and nitrogen dioxide levels remain in the Good category, so they are not significant contributors to today’s air pollution. Visibility in Denver is fluctuating between Good and Moderate, and periods of reduced visibility may occur if humidity and showers pass through the region[1].

No official Action Day has been declared, which would indicate air quality deemed Unhealthy or worse, but today’s conditions still merit some caution. If you are sensitive to air pollution, it is wise to monitor symptoms and adjust outdoor activities as needed. Staying informed through local air quality advisories and forecasts will help you make the safest choices for your health[1][5].

Today's Air Quality for Denver: What You Need to Know

Denver residents face Fair air quality conditions today, Sunday, May 25, 2025. This represents an improvement from yesterday's Poor air quality rating[5]. While the air quality is generally acceptable for most individuals, sensitive groups may still experience minor to moderate symptoms from long-term exposure[5].

The most recent measurements from yesterday evening showed an Air Quality Index (AQI) value of 60 for particulate matter less than 2.5 micrometers (PM2.5), which falls in the Moderate range[3]. Under these conditions, unusually sensitive individuals might experience respiratory symptoms, and people with cardiopulmonary disease and older adults could see possible aggravation of heart or lung disease[3].

Denver's air quality has been fluctuating over recent days. Earlier this month, from May 5-9, Colorado celebrated Air Quality Awareness Week, highlighting the importance of monitoring air conditions[1]. Recent trends show varying AQI levels throughout the day, with measurements ranging from Good to Moderate depending on the time and location[4].

Looking ahead, tomorrow's forecast unfortunately predicts a return to Poor air quality conditions, which will continue through Tuesday, May 27[5]. During Poor air quality days, the air reaches higher levels of pollution and becomes unhealthy for sensitive groups. Health officials recommend reducing time spent outdoors if you experience symptoms such as difficulty breathing or throat irritation[5].

For those concerned about air quality, Colorado's Department of Public Health and Environment provides regular updates. The state's Summer 2025 Ozone Action Day Alert Program will begin on June 1, while the Winter High Pollution Advisory Program will start November 1[3].

Remember that unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion during Moderate air quality conditions, and everyone should stay informed about changing air quality levels, especially as we head into the summer months when ozone levels typically rise[3].

Denver’s air quality today is mostly favorable for outdoor activities. The latest readings show an Air Quality Index around 19 in central areas like I-25, which falls into the Good category according to health standards. This means the air is clean, with little or no risk from pollution for the general population, and no special precautions are needed for outdoor exercise or recreation[5].

According to the Colorado Department of Public Health and Environment, ozone levels peaked at 74 overnight, which is considered Moderate. This range is generally safe, but people who are unusually sensitive to ozone, such as those with asthma or other respiratory conditions, should consider reducing outdoor exertion between noon and 8 pm. For most residents and visitors, activities can continue as normal[1].

Fine particulate matter, carbon monoxide, and nitrogen dioxide all remain in the Good range, so concerns about wildfire smoke or traffic emissions are minimal today. Visibility across the Denver metro area is also generally Good to Moderate, though occasional humidity or rain showers may cause brief periods of reduced clarity[1].

Temperatures in Denver today are forecasted to reach a high of 26 degrees Celsius with a low around 13 degrees, creating comfortable conditions to enjoy the outdoors[2]. No Air Quality Action Day is in effect, and there are no restrictions on outdoor burning or other activities.

In summary, Denver’s air is clean and healthy this Saturday. Sensitive individuals should watch midday ozone if planning strenuous activity, but for most people, the air quality poses no concern. Residents can look forward to continued good conditions into early next week[1].

Air quality in Denver today, Tuesday, May 20, 2025, is generally rated as good. The Air Quality Index, or AQI, for the Denver metro is measured at 64, which falls in the Good category according to the latest summary from Colorado’s official air quality monitoring system. This means the air is healthy and safe for outdoor activities for people of all ages and backgrounds.

Key pollutants monitored include ozone, particulate matter, and nitrogen dioxide. Ozone levels are currently low, measuring about 59 parts per billion, which is well within safe limits for the Denver area. The AQI for the I-25 corridor through Denver is also reported at 26, reinforcing the good air quality rating. Measurements for particulate matter show PM2.5 levels at just 3 micrograms per cubic meter and PM10 at 7 micrograms per cubic meter. Both are safely below the thresholds that trigger health concerns. Other pollutants, such as carbon monoxide and sulfur dioxide, remain at minimal levels and do not pose a hazard today.

There are no active air quality advisories or special warnings for the greater Denver area. Weather conditions are favorable, with a high of 22 degrees Celsius, mostly clear skies, and a light breeze, further supporting good air dispersion and limiting pollutant buildup.

For residents and visitors, today presents an excellent opportunity to enjoy outdoor activities without restriction from air pollution. Sensitive groups, including children, seniors, and those with respiratory issues, can also safely be outside, as there are no elevated risks from ozone or particle pollution.

In summary, Denver’s air today is clean and healthy, offering reassurance for everyone planning to be outdoors. Continued monitoring is recommended, but as of now, the outlook is positive for air quality across the metro region[1][2][5].

Denver’s air quality today, May 17, 2025, is rated as poor, with air pollution levels considered unhealthy for sensitive groups. The Air Quality Index in the Denver metro area is in the 40s, indicating a Moderate rating, but several sources highlight elevated pollution levels that pose specific concerns for people with respiratory conditions, children, and older adults. Anyone experiencing symptoms like difficulty breathing or throat irritation should limit time outdoors and reduce strenuous activities.

Ozone is the main pollutant of concern, with earlier measurements indicating values that could reach into the Moderate to Poor range. Sensitive individuals are advised to reduce prolonged or heavy outdoor exertion, especially from midday until late evening. While fine particulate matter and other common pollutants such as carbon monoxide and nitrogen dioxide remain within safe limits, ozone pollution is the primary factor lowering today’s air quality rating.

The broader Front Range, including Denver, has been under advisories this week due to persistent ozone, which often worsens on warm, sunny days when atmospheric conditions trap pollutants near the ground. No Action Day has been declared, but air quality forecasts suggest continued caution, particularly for those with underlying health conditions or increased sensitivity to air pollutants.

Today’s conditions are a timely reminder of the ongoing air quality challenges in the Denver area, as underscored by recent reports from organizations like the American Lung Association. While visibility is generally good and most pollutants are within acceptable ranges, today’s heightened ozone levels mean that people in sensitive groups should remain vigilant and consider indoor activities during peak pollution hours. Residents are encouraged to check local updates for any changes throughout the day and take recommended precautions to protect their respiratory health[1][2][5].

Denver is experiencing elevated ozone pollution today, with air quality officially classified as Unhealthy for Sensitive Groups. The Air Quality Index has hovered around the 100 mark, meaning people with respiratory conditions, children, and older adults should take precautions. Unusually sensitive individuals may experience symptoms like coughing or shortness of breath and should consider limiting prolonged or heavy outdoor activity. While there are no active advisories for Denver and the broader Front Range area, some nearby regions, especially parts of Larimer and Weld counties, have recorded even higher ozone levels.

Throughout the day, skies remain clear and temperatures are seasonably warm, conditions that often contribute to ground-level ozone formation, especially during the afternoon and early evening. Ozone pollution typically increases on sunny days with light winds when emissions from vehicles and other sources can react in the atmosphere. This pattern is expected to persist through the day, so vulnerable groups are advised to monitor symptoms and spend less time outdoors if they notice any respiratory discomfort.

The Colorado Department of Public Health and Environment and the Regional Air Quality Council note that the official Ozone Action Day Alert program will begin on June 1. However, air quality action days or advisories can be issued at any time should pollutant concentrations spike further. Statewide conditions and real-time updates are available via state air quality resources.

For most healthy adults, outdoor activities can continue as usual, but everyone is encouraged to stay informed about changing conditions and take sensible precautions as needed. If you feel symptoms such as difficulty breathing or throat irritation, it is recommended to reduce time outdoors and seek indoor environments where air quality is better. Denver’s air quality can shift quickly, particularly during the spring and summer months, so staying tuned to official sources is the best way to remain healthy and enjoy your day safely[1][4][5].