Denver’s air quality today is expected to range from good to moderate, with no advisories or indoor burning restrictions in effect for the metropolitan region. Breezy winds combined with strong atmospheric mixing are allowing pollutants such as ozone, carbon monoxide, nitrogen dioxide, and fine particulate matter to remain at levels classified as either good or moderate for Saturday’s forecast period.

As of Friday afternoon, Denver’s highest measured Air Quality Index was 51 for fine particulates smaller than 2.5 micrometers. This falls into the moderate category, which means most people can go about their usual activities, but individuals who are unusually sensitive to particle pollution, such as those with heart or lung disease or older adults, may experience minor respiratory symptoms or aggravation of their conditions. In those cases, reducing heavy or prolonged exertion outdoors can be advisable.

Ozone concentrations are forecasted to be in the good range for both Friday and Saturday. Carbon monoxide and nitrogen dioxide are also expected to remain at good levels. Visibility is anticipated to be good to moderate for most of the day. These conditions are typical for the Front Range during this part of the year, aided by atmospheric mixing which disperses pollutants and limits buildup.

Historically in 2025, Denver has experienced generally healthy air: 90 percent of the days so far this year have met the World Health Organization’s safe air quality limits, indicating a very low risk for health problems from pollution. However, Denver remains on watch for ozone pollution, as periods of heat and wildfire smoke can trigger worse conditions—this summer, for instance, air quality advisories and action days were issued in response to high ozone and particulate levels.

For today, most residents and visitors in Denver should find outdoor conditions comfortable, but those with heightened sensitivity to air pollution may wish to take basic precautions, such as limiting strenuous outdoor activity during afternoon highs in particulate concentration.

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Today, Denver’s air quality is generally considered good, with some periods of moderate levels, primarily due to fine particulate matter. For Saturday, November 1, 2025, there are no current air quality advisories issued for the Denver metro region, and the winter High Pollution Advisory Program has just begun. Officials will now monitor daily pollution levels more closely through winter to protect residents’s health[5][6].

The Air Quality Index (AQI) for Denver early this morning is in the good range, meaning pollution poses little or no risk for most people. Fine particulate matter, known as PM2.5, is the main concern this time of year. PM2.5 consists of tiny particles from sources like vehicles, fireplaces, and atmospheric conditions that can penetrate the respiratory system. While levels are not high enough to warrant an Action Day or burning restrictions as of now, individuals who are unusually sensitive to air pollution—such as those with chronic respiratory conditions, young children, or the elderly—should still monitor air quality forecasts[4][5].

The air in Denver during November is typically influenced by colder temperatures and atmospheric inversions, which trap pollutants close to the ground and can create the familiar “Brown Cloud.” This haze is made up of particulate matter and can impair visibility and affect respiratory health. The Colorado Department of Public Health and Environment (CDPHE) issues daily air pollution advisories, calling for voluntary driving reductions or indoor burning restrictions whenever conditions exceed standards[3].

Ninety percent of the days so far this year in Denver have been within safe air quality limits, indicating a very low health risk for most residents. However, occasional spikes in pollution—most commonly during stagnant weather or when wildfire smoke drifts from other states—can temporarily elevate particulate matter and ozone, prompting caution for sensitive groups[2][3][4].

Overall, the city’s air is safe for outdoor activity today, but the start of winter could bring more frequent advisory periods, particularly on calm days when pollution builds up. Denver residents are encouraged to stay informed through state forecasts, reduce unnecessary burning, and help limit emissions on poor air days to protect community health[3][5].

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Denver’s air quality today is in the Moderate range, with the highest recorded Air Quality Index, or AQI, reaching 68 for particulate matter less than 10 micrometers early in the morning. Throughout much of the city, the AQI has hovered between the high 50s and mid 60s, primarily driven by fine particulate pollution. Ozone and other pollutants remain in the Good category.

Moderate air quality means that air pollution levels are acceptable for most people, but there is a slight risk for individuals who are unusually sensitive to airborne particles, such as those with respiratory or heart conditions. These individuals should consider reducing prolonged or heavy outdoor exertion, especially if they notice symptoms like coughing or throat irritation.

No air quality advisories are currently in effect for Denver or the surrounding Front Range Urban Corridor. Carbon monoxide and nitrogen dioxide remain well within Good levels, and ozone is expected to remain in the Good category through the weekend. The highest particulate concentrations were seen near the South Platte River corridor, from Denver northward, but pollution levels are projected to improve in the coming days.

In terms of visibility, conditions are likely to be moderate to poor at times on Saturday in the Denver area, with improvements expected beginning Sunday. The overall health risk for the Denver area today is considered very low for the general population, and 90 percent of the year’s days so far have been within the World Health Organization’s recommended air quality guidelines.

Outdoor activities can proceed as usual for most of Denver’s residents, though those with heightened sensitivity may wish to monitor symptoms and remain indoors during periods of increased particulate matter, especially during the early morning hours when daily AQI tends to peak. For most, today’s air remains suitable for work, school, and recreation outdoors.

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Denver’s air quality today is rated as Good, with the Air Quality Index in the low to mid 40s for ozone, and all primary pollutants—ozone, particulate matter, carbon monoxide, and nitrogen dioxide—remaining well below levels of health concern. There are no air quality advisories in effect for Denver or the broader Front Range region.

The most recent measurements report a highest AQI value of 46 for ozone and 44 around midday yesterday, both categorized as Good by the Environmental Protection Agency. Air quality forecasts expect continued Good air quality conditions through the weekend.

Throughout 2025, Denver’s air has remained largely within the World Health Organization’s safe limits, with over ninety percent of days rated as Good. The average AQI for the year has been 33, signifying consistently clean air. The highest AQI observed locally in the past two days reached 44 at 2 PM, while the lowest, a very clean 10, was recorded at 7 AM. These values reflect the typical daily pattern: slightly higher AQI numbers in the afternoon and lowest in the early morning hours, but always remaining within the Good category.

Ozone, which tends to rise on hot, sunny days, has been the primary air quality concern in recent years, but today levels are low. Monitoring data from the Colorado Department of Public Health and Environment and the Regional Air Quality Council confirm no Action Day alerts for ozone or particulates are necessary, and no restrictions, such as burning or driving advisories, are in effect.

For sensitive populations including young children, the elderly, and those with respiratory conditions, today’s air does not pose a measurable risk. Residents and visitors can safely engage in outdoor activities across Denver and surrounding counties. Visibility is forecasted to remain Good to Moderate, and the risk of acute or chronic health effects is considered very low given today’s pollution levels.

Denver continues to benefit from improved air quality and stable weather conditions, supporting healthy outdoor recreation this October day.

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Denver’s air quality today is ranked as moderate, with an Air Quality Index of 52 to 58 measured at monitoring sites in the metro area. The primary pollutant for this reading is fine particulate matter less than 2.5 micrometers, with concentrations around 13 micrograms per cubic meter recorded early in the morning. This moderate AQI means air pollution is acceptable for most individuals but may pose a minor risk for those who are unusually sensitive, such as people with respiratory conditions or older adults.

No official air quality advisories are currently in effect for the Denver-Boulder region or the greater Front Range Urban Corridor, and ozone levels remain in the good category. The absence of advisories indicates that most residents can go about daily activities without concern for air pollution, though sensitive groups may want to limit prolonged outdoor exertion. Recent trends from this week show Denver’s AQI has hovered in the moderate range, with daily highs typically occurring during early morning hours and lower readings later in the day.

From a historical perspective, today’s AQI is among the higher readings seen on this date over the past years, but it does not cross into more hazardous categories. Weather conditions are mild, and visibility remains good across the area, with no significant smoke events or air quality alerts affecting Denver at this time.

Overall, while Denver’s air is moderately affected by fine particulate pollution today, public health impacts are limited and outdoor activities remain safe for most people. However, individuals unusually sensitive to air pollution should monitor their symptoms and consider taking it easy until air quality improves further[2][3][1].

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Today’s air quality in Denver is considered good overall, with the Air Quality Index, or AQI, reading at 23 during the latest measurement. At this level, air quality poses little or no risk to health for the general public. The primary pollutants measured are particulate matter (PM2.5 and PM10), ozone, nitrogen dioxide, and carbon monoxide. Levels of fine particulate matter, PM2.5, are currently at 0 micrograms per cubic meter, while larger particulates, PM10, are slightly elevated at 38 micrograms per cubic meter, both remaining well within safe limits.

Ozone levels in Denver are moderate this morning, with a recorded value reaching a maximum of 57 parts per billion during the overnight hours, briefly pushing the AQI into the moderate range at a peak value of 58. These moderate readings occur generally in the early morning and tend to decrease as the day progresses. The ozone level during most of Saturday is expected to remain in the good category, presenting minimal health concerns for sensitive groups, such as people with asthma or respiratory conditions.

Carbon monoxide and nitrogen dioxide, both traffic-related pollutants, are measured at 140 parts per billion and 12 parts per billion respectively, showing no cause for concern. Sulfur dioxide is at a negligible 1 part per billion, well below any threshold that would prompt a health advisory.

Meteorological conditions today in Denver support this good air quality, with sunny skies, a temperature around 29 degrees Celsius, low humidity at 14 percent, and light winds at 9 kilometers per hour. These weather factors help disperse any accumulating pollutants.

Statistically, Denver enjoys relatively healthy air by international standards. This year, 91 percent of days have remained within the World Health Organization’s recommended safe limits, leaving the overall risk of air pollution-related health issues classified as very low for the region.

In summary, residents and visitors to Denver today can enjoy outdoor activities without restriction, as air quality is firmly in the good range and pollutant concentrations are low. There are no advisories or special precautions recommended for any group. The outlook for the remainder of the day is for air quality to stay favorable as meteorological conditions remain stable and pollutant levels are expected to remain low.

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Denver’s air quality today, September 27, 2025, is rated as good with an Air Quality Index of 36, meaning the air is healthy for all residents. Fine particulate matter known as PM2.5 is measured at 2 micrograms per cubic meter, and larger particulate matter, PM10, is at 26 micrograms per cubic meter, both well below levels associated with health concerns. Ozone levels are low at 12 parts per billion, with other pollutants like nitrogen dioxide and carbon monoxide also reported at minimal concentrations.

Over the past 24 hours, the air quality index in Denver fluctuated but consistently remained in the good range, with values peaking at 40 and dipping to as low as 18. The highest readings tended to occur midday, but at no point did air quality reach a level likely to pose health risks for sensitive groups or the general population.

Denver’s air quality performance this year remains strong, with over 90 percent of days in 2025 so far falling under the World Health Organization’s safe limits. Denverites can be confident heading outdoors today—conditions are clear from significant pollution, thanks in part to dry weather, modest wind speeds around 4 kilometers per hour, and low humidity. No special precautions are recommended, and everyone can safely enjoy outdoor activities without restriction.

Looking at historical data, Denver’s air quality on this date has consistently been classified as good in recent years, making today consistent with usual trends for early autumn. This overall clean air situation also suggests little lingering smoke or pollution from regional wildfires or industrial sources, both of which sometimes impact Colorado at this time of year.

In summary, Denver is experiencing healthy air quality conditions today, with very low pollution levels, posing little or no risk even to sensitive populations. Residents and visitors alike can enjoy fall weather and outdoor pursuits without concern for air pollution impacts on health.

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Today’s air quality in Denver is rated as good, with the Air Quality Index generally measuring between 15 and 29 in the last 24 hours. This level means the air is clean and poses little or no risk to anyone and people are encouraged to enjoy outdoor activities without concern. The main pollutants measured include PM2.5 at 5 micrograms per cubic meter, PM10 at 17 micrograms per cubic meter, ozone at 27 parts per billion, and nitrogen dioxide at 13 parts per billion. All of these are considered well within safe limits for health according to both national and World Health Organization standards.

No air quality advisories or health warnings are currently in effect for the Denver metropolitan area or the broader Front Range Urban Corridor. The ozone level reached its peak at 67 overnight Thursday, still only at the low end of the moderate range where only unusually sensitive individuals may experience minor respiratory symptoms. For the general population, the risk remains very low.

For all of 2025 so far, Denver has experienced good or moderate air quality on about 90 percent of days, indicating that the vast majority of the year has seen air meeting or exceeding recommended safety standards for fine particulate matter and ozone. This places Denver among cities with consistently healthy outdoor air, supported by weather conditions such as clear skies, comfortable humidity, and light winds.

Outdoor exercise, commuting, or extended time outside are all considered safe for people of every age and health status today. There are no restrictions or precautions suggested for schools, athletes, children, elderly, or individuals with respiratory conditions.

Overall, today’s air quality in Denver offers a safe and pleasant environment for all outdoor activities, reflecting stable and low levels of pollution with clear public health assurances from state and local agencies.

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Air quality in Denver today is rated as Good, with an Air Quality Index around 31 to 34. This means the air is clear and safe for all populations, including sensitive groups such as children, seniors, and those with respiratory conditions. The main pollutants measured are particulate matter and ozone, but all remain well below levels that would raise health concerns.

The current PM2.5 concentration, the fine inhalable particles often linked to health problems, is just 3 micrograms per cubic meter, and PM10, the larger dust particles, is measured at 24 micrograms per cubic meter. Ozone is at 37 to 40 parts per billion, also within the Good category for air quality. Levels of carbon monoxide, sulfur dioxide, and nitrogen dioxide are minimal and report no risk for short-term exposure.

Weather conditions today are partly cloudy, with temperatures ranging from 15 to 30 degrees Celsius and humidity near 17 percent. Winds are light, measuring around 4 kilometers per hour, helping to keep air pollutants dispersed rather than concentrated.

No air quality advisories or health alerts have been issued by the Colorado Department of Public Health for the Denver area or the Front Range. The outlook remains favorable for the next several days, with all pollutants expected to stay in the Good range. Visibility in the region is also expected to be good, further reflecting the low levels of particulates in the air.

Historically, Denver has experienced excellent air quality for most of 2025, with 90 percent of days falling within the World Health Organization’s safe air quality limits. As of today, the public does not need to restrict outdoor activity due to air pollution. For those enjoying weekend plans outdoors, today’s air in Denver is among the cleanest it has been all year. Daily air quality will continue to be monitored by state and local agencies to ensure these conditions persist.

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Denver’s air quality today is in the moderate category with an Air Quality Index value of 64 for particulate matter measured at 3 PM on Monday. This means air quality is generally acceptable, but there could be a minor health concern for individuals who are unusually sensitive, especially to ozone and small particles. For these sensitive groups, including those with respiratory conditions, reducing prolonged or heavy outdoor activity from noon to 8 PM is recommended, though most residents will not be affected.

Ozone levels are forecasted to remain in the good to moderate range both today and tomorrow. Particulate matter, carbon monoxide, and nitrogen dioxide concentrations are all expected to stay in the good category through Tuesday, indicating that overall air pollution remains relatively low in Denver. Furthermore, visibility is expected to stay good throughout Tuesday.

Over the past 24 hours, the highest recorded AQI in Denver reached 71 at 6 AM, while the lowest point was 34 at 9 PM, reflecting a decrease in pollution as the day progressed. Fine particulate matter concentrations, which are one of the main pollutants, are expected to continue dropping due to unsettled weather and shifting winds moving smoke out of the Denver area.

No air quality advisories or Action Days are currently in effect for the Denver metro and the broader Front Range region. The Colorado Department of Public Health and Environment does not anticipate needing any short-term advisories, so the risk from air pollution will remain low for most people today and tomorrow.

Denver residents can expect generally clean air with only minor concerns for sensitive individuals until conditions change. Unusually sensitive groups should stay aware, especially during peak midday hours when pollution tends to be highest, but for the general public the air quality is expected to be good.

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Denver’s air quality today is in the moderate range, with an Air Quality Index (AQI) of 81 for fine particulate matter reported around 7 AM MDT. Visibility across the metro area is somewhat reduced, with hazy skies due to wildfire smoke drifting from active fires in the Pacific Northwest and Canada. The National Weather Service and state agencies have confirmed most of the smoke is aloft, but there are still concerns for sensitive populations. People with heart or lung conditions, older adults, and children should consider reducing prolonged or heavy outdoor exertion.

The recent weather trend shows Denver’s AQI fluctuating between around 50 and 80 in the past several days, reflecting a mix of local and external wildfire influences. While a grass fire in Arvada occurred yesterday, local meteorologists report that it is not significantly impacting Denver’s air; the haze is almost entirely coming from outside the region. According to satellite imagery, conditions are expected to gradually improve through the weekend as smoke moves south and clears from the Front Range.

On Colorado’s Western Slope, air quality remains in the healthy or “green” category, since wildfire smoke there is staying higher in the atmosphere and not affecting ground-level conditions. The Denver-Boulder corridor is currently experiencing the worst air quality in the state, with elevated PM2.5 concentrations driven primarily by long-range transport of wildfire particles.

There is a health advisory for portions of northwestern and north-central Colorado regarding wildfire smoke. For Denver specifically, no surface-level air quality advisories are currently in effect, but officials continue to monitor updates and encourage residents to stay informed.

For those concerned, staying indoors during smoky periods, using air filters, or following public health guidance can help minimize exposure. Denver’s air quality is likely to improve as the weekend progresses, but today, moderate levels of wildfire smoke should prompt precautions among sensitive groups.

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Denver's air quality today is in the **Good to Moderate range**, meaning the majority of residents can safely enjoy outdoor activities without concern. Recent reports indicate **no advisories are in effect for ozone or other pollutants** across the Front Range Urban Corridor, which includes Denver, Boulder, and surrounding areas, through this afternoon. The highest ozone AQI recorded last night was 54, which falls within the Moderate category but does not pose a threat for most healthy individuals. Unusually sensitive groups, such as those with preexisting respiratory conditions, may wish to limit prolonged or strenuous outdoor exertion when AQI approaches the Moderate threshold[2].

Current air quality levels have benefitted from **breezy weather and scattered showers**, which help disperse pollutants and keep ozone levels in check. The air quality index fluctuated between 37 and 54 overnight, remaining comfortably below levels that would trigger official health advisories. Over ninety percent of days so far this year have met or exceeded the World Health Organization's safe air quality standards, and the overall risk of health effects remains very low for the general population[1].

Residents can expect **continuing Good to Moderate air quality through the afternoon**, with ozone and particulates well within safe limits. Meteorologists and health officials monitor these readings closely, and updates are available from Colorado's air quality advisory system should conditions change. For most people, today's weather conditions and pollutant levels support routine outdoor activities, whether for exercise or recreation[2][1].

Today in Denver, air quality is generally good with some moderate levels of particulate matter detected early in the morning. As of 1 AM Mountain Standard Time, the ozone Air Quality Index is recorded at 38, which falls into the Good category, indicating the air is clear and safe for most people. The highest particulate matter measurement, specifically PM2.5, reached an index of 56, classified as Moderate. This means air quality is acceptable for the general public, but those who are unusually sensitive, such as people with respiratory conditions, heart disease, older adults, or very young children, should consider reducing prolonged or heavy outdoor exertion during the day.

Pollutants such as carbon monoxide and nitrogen dioxide are predicted to remain in the Good range throughout the day. Overall, ozone concentrations are expected to stay between Good and Moderate, with the only caution for unusually sensitive individuals to limit strenuous activities outdoors between noon and 8 pm. Visibility is expected to be good, though there could be brief periods of reduced visibility during any passing showers or thunderstorms.

No air quality advisories or action days are in effect as of this morning, and there currently are no reports of significant wildfire smoke impacts in Denver. Therefore, outdoor conditions are favorable for most activities, but it remains wise for sensitive individuals to monitor air quality updates and take simple precautions if they notice symptoms when air quality is moderate.

Denver’s air quality today reflects a typical late summer day with manageable pollutant levels and no significant health threats to the broader public. Those planning outdoor exercise or events can do so with confidence, though it’s never a bad idea to check the latest updates if weather or smoke conditions change later in the day. For most, the air in Denver today poses little to no risk, supporting a safe and active Saturday outdoors[1][3][5].

Today, Denver’s air quality is classified as good to moderate, providing a generally comfortable environment for outdoor activities. At 7 AM Mountain Standard Time, the Air Quality Index for particulate matter (PM2.5), a common urban pollutant, was recorded at 44, which falls within the good range and suggests minimal risk to public health. Ozone concentrations are also expected to remain in the good to moderate range throughout the day.

People who are unusually sensitive to ozone, such as those with asthma or other respiratory issues, should consider limiting prolonged or heavy outdoor exertion between noon and 8 pm. Ozone tends to rise during afternoons due to increased sunlight and heat, potentially leading to temporary respiratory discomfort for sensitive individuals. Even during a moderate ozone forecast, it is prudent for at-risk groups to take these precautions.

Other major air pollutants, including carbon monoxide and nitrogen dioxide, are also expected to stay in the good category today. Visibility for the Denver metro area is forecast to be good to moderate, with no significant haze or smoke impacting the region. There are no current advisories issued for ozone or any other pollutant for Denver and the Front Range Urban Corridor until at least 4 p.m., indicating that average residents face low risk from air pollution at this time.

Denver’s air quality trends this August reflect a high proportion of days within safe air quality limits, with historical data showing very low risks of health issues from pollution. However, city officials remind residents that ground-level ozone, while not alarming today, can be a serious health concern on action alert days. Everyone can contribute to better air quality by reducing car trips and emissions, especially during the summer months when ozone levels are most susceptible to spikes.

Monitoring will continue hourly, and advisories may be issued if conditions change due to weather, emissions, or other factors. For now, Denver remains a safe city for outdoor enjoyment, with only mild cautions for those especially sensitive to ozone and airborne particulates[1][3][4].

Denver’s air quality today is in the moderate range for both ozone and fine particulate matter. As of 5 PM yesterday, the Air Quality Index reading for ozone was 58, and for PM2.5 (fine particulate matter) it was 64. Both are classified as moderate, meaning air quality is acceptable, but there might be a minor health concern for people unusually sensitive to pollution. Those individuals, particularly those with heart or lung conditions and older adults, should consider limiting prolonged or heavy outdoor activities.

No air quality advisories or alerts are currently in effect for ozone or other pollutants in the Denver area, and this has been forecast to continue through at least 4 p.m. today. Most other monitored pollutants, including carbon monoxide and nitrogen dioxide, are in the good category, and visibility is considered good to moderate across the Front Range.

Smoke from wildfires in northwestern Colorado is making its way across the region, but conditions in Denver and the Northern Front Range have improved compared to Thursday. On Thursday, there was an action day for multiple pollutants, but air quality has since gotten better, with both ozone and particulate levels decreasing. The improvement is welcome, although anyone sensitive to smoke or pollution should continue to monitor real-time data and take appropriate precautions, such as staying indoors during periods of visible haze or avoiding strenuous outdoor exercise.

Ground-level ozone remains a concern during the summer, as hot temperatures and sunlight can increase its production. Even moderate levels can cause acute respiratory symptoms, trigger asthma attacks, and aggravate chronic lung conditions, especially in children, older adults, and those with pre-existing respiratory issues.

Overall, Denver’s air is healthier than earlier in the week, but moderate levels of ozone and particulate matter call for a bit of caution for those who are unusually sensitive to air pollution.

Denver’s air quality this morning is rated mostly as Good, with localized areas experiencing Moderate levels of particulate matter. The Air Quality Index, or AQI, for ozone at the latest reporting times remained in the Good range, indicating that ozone pollution currently poses little risk to the general population. Specifically, recent measurements show ozone AQI values around 48 to 50, which means the air is considered satisfactory and should be safe for most residents.

However, particulate matter known as PM2.5 has been measured at an AQI of 66, which falls into the Moderate category. For most people, this level of particulate pollution is not a health concern. Nevertheless, unusually sensitive individuals, such as those with previous heart or lung disease or older adults, may begin to experience minor respiratory symptoms or worsening of existing conditions. These groups are encouraged to limit prolonged or heavy outdoor exertion during periods when PM2.5 is elevated.

No Ozone Action Day Alerts are currently in effect for Denver and the surrounding counties as of this morning. The Colorado Department of Public Health and Environment indicates that air pollution levels will likely remain steady through the early afternoon, with no major advisories or warnings for heightened risk expected at least until 4 p.m. today.

Residents in the greater Denver-Boulder area can expect overall clean air conditions for outdoor activities throughout most of the day. Still, monitoring advisories is recommended for those in sensitive groups as air quality can change throughout the afternoon, especially if temperatures rise or weather conditions stagnate.

Air quality and advisory updates are available from the Colorado Department of Public Health and Environment and can be checked online for the latest information throughout the day[1][2][4].

Denver’s air quality today is classified as Moderate, based on measurements and forecasts for ozone and particulate matter in the region. The latest data show the highest Ozone Air Quality Index, or AQI, reached 93 in the evening hours of July 25th, indicating moderate ozone pollution. Meanwhile, the AQI for fine particulate matter, known as PM2.5, was 55, also within the moderate range.

Moderate air quality means the air is generally acceptable, but there may be a risk for some people. Sensitive groups—such as children, older adults, and those with respiratory conditions like asthma—should consider limiting prolonged or heavy outdoor activity, especially from noon to 8 pm. In these conditions, active children, healthy adults, and anyone with lung or heart diseases may experience mild symptoms or worsening of preexisting conditions. Air quality authorities have issued an Ozone Action Day Alert, encouraging all residents to avoid rigorous outdoor activities during the heat of the day.

For fine particulate matter, unusually sensitive individuals are advised to reduce extended outdoor exertion, though most people will not be affected. Carbon monoxide and nitrogen dioxide levels are both in the Good category and not expected to pose any health risks today.

Visibility in Denver is expected to be moderate. The main health concern for the day remains ground-level ozone, which is formed from vehicle emissions and industrial pollution reacting with sunlight. Exposure to elevated ozone levels may cause acute respiratory effects, trigger asthma attacks, and potentially cause lasting lung damage with prolonged high exposure.

In summary, Denver residents are advised to stay informed and follow health recommendations, particularly if they are part of a sensitive group. For the general population, outdoor activities are safe but avoiding peak afternoon hours is recommended for those at higher risk. The air pollution risk today is moderate, and most people will not experience symptoms, but precautions are suggested for those unusually sensitive or with underlying health issues. The Ozone Action Day Alert for the Front Range will remain in effect until at least this afternoon to ensure public health guidance is followed.

Denver’s air quality today is classified as Good to Moderate, with no active advisories for ozone or other pollutants in effect through at least 4 p.m. for the entire Front Range Urban Corridor, which includes the Denver-Boulder area. The latest assessment by the Colorado Department of Public Health and Environment notes that unsettled weather and scattered showers are helping to limit ozone formation. As a result, ozone concentrations are expected to remain in the Good to Moderate range for the day.

The Air Quality Index for Denver today generally falls between 51 and 100, which corresponds to a Moderate level. This means air quality is acceptable, though there may be a risk for individuals unusually sensitive to air pollution. Key contributors to air quality at this time include ozone and fine particles (PM2.5), but levels are not expected to pose a concern for the general public.

Current visibility in Denver is described as moderate. No Ozone Action Day is in effect, and no additional pollutants have reached levels that would trigger health advisories. If atmospheric conditions change and ground-level ozone or other pollutants increase, an advisory will be issued, but as of this morning, the air remains clear of such alerts.

Weather forecasts indicate continued scattered showers, which should continue suppressing pollutant buildup and maintain stable air quality through the afternoon. Residents and visitors can engage in regular outdoor activities with minimal concern for health impacts, but anyone with heightened sensitivity to air pollution should consider monitoring any updates if atmospheric conditions change later in the day. Real-time data and updates remain available through state air quality resources and monitoring stations for those seeking more detailed information throughout the day[1][4][2].

Denver is under an Ozone Action Day Alert that began Friday afternoon and remains in effect until at least 4 p.m. Saturday, July 12, 2025. This alert covers the entire Front Range Urban Corridor, including Denver, Boulder, Fort Collins, and Greeley. Recent measurements show that ozone levels have climbed into the Unhealthy for Sensitive Groups category, with an Air Quality Index of 104 recorded Friday evening. This means that while the general public isn’t likely to be affected, people with respiratory conditions, children, older adults, and those who are unusually sensitive to air pollution should limit prolonged or heavy outdoor exertion.

Particulate matter, or PM2.5, has also been measured at moderate levels, with an AQI of 54. For most people, air quality remains acceptable; however, sensitive individuals might experience mild respiratory symptoms and should consider reducing outdoor activities, especially if they have underlying heart or lung disease.

Unsettled weather earlier in the week kept ozone concentrations in the Good to Moderate range, but hot and stagnant conditions are now allowing ozone to build up. Action Days like today are called when air pollution is either already unhealthy or is likely to worsen. This triggers voluntary pollution prevention measures and public health recommendations.

If you see or smell smoke, especially from wildfires in southwestern Colorado, remain indoors and keep windows closed, particularly if you are sensitive to air pollution. The Colorado Department of Public Health and Environment advises everyone, but especially vulnerable groups, to monitor symptoms and avoid unnecessary exposure during periods of higher pollution.

For most Denver residents, outdoor activities are still safe, but it is recommended to stay informed on hourly updates and advisories as conditions can change quickly. Those in sensitive groups should pay particular attention and adjust outdoor plans accordingly to minimize health risks.

Denver’s air quality for Sunday, July 6, 2025, is being rated as moderate for particulate matter (PM2.5) with an Air Quality Index (AQI) of 57, based on the latest official observations. This means that the air is generally acceptable for most people, but individuals who are unusually sensitive to air pollution, particularly those with respiratory or heart conditions and older adults, could begin to experience mild health symptoms. Those in sensitive groups are advised to consider reducing prolonged or heavy outdoor exertion during the day[1].

Ozone concentrations for today are projected to remain in the good to moderate range, particularly between noon and 8 p.m. People who are unusually sensitive to ozone should also consider limiting outdoor activity during these hours[1]. Ozone can be particularly troubling during warmer periods and may cause acute respiratory issues or trigger asthma attacks in sensitive individuals.

Other common pollutants such as carbon monoxide and nitrogen dioxide are expected to stay in the good category, presenting minimal risk to the general population. Visibility throughout the day is forecast to be good to moderate, which aligns with the moderate levels of particulate matter being detected[1].

No air quality advisories or Ozone Action Day Alerts are currently in effect for the Denver metro area or the greater Front Range Urban Corridor. Residents can continue normal activities but should remain mindful of symptoms if they fall into sensitive categories[1][3].

Denver’s air quality has seen challenges in the past, particularly during hot, stagnant days when pollution can become trapped near the surface, intensifying ozone and particulate concentrations. While today’s levels are moderate and do not warrant a formal advisory, the city’s long-term air quality can fluctuate quickly due to weather shifts and population pressures, making it important for residents to stay informed through official updates[1][4].