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Common Ground News

Why is the air quality bad today in Fresno?

Author

David Ramirez

Updated on February 23, 2026

Why is the air quality bad today in Fresno?

Ozone within Fresno is created through Oxides of Nitrogen and Volatile Organic Compound (VOC) emissions from vehicles, agricultural operations, and industries combined. Reactive organic gases (ROG) -- ROG also referred to as volatile organic compounds (VOC) is one of the leading causes for Fresno's air pollution.

Keeping this in consideration, what is the air quality in Fresno today?

Fresno - Drummond Street, Fresno, California Air Pollution: Real-time Air Quality Index (AQI)

CurrentMax
PM2.5 AQI2048
PM10 AQI5253
O3 AQI4250
NO2 AQI721

Subsequently, question is, why does the Central Valley have poor air quality? Reducing Air PollutionThis is a result of the valley's topography – surrounding mountain ranges trap air pollutants -- and pollution sources, including heavy truck traffic on I-5 and Highway 99; diesel-burning locomotives, tractors and irrigation pumps; and wood-burning stoves and fireplaces.

Accordingly, why is San Diego air quality bad today?

Ozone is the main ingredient of smog, making it one of the most widespread causes of air pollution and associated health threats in California. The other kind of pollution, short-term particle pollution, has gone down in San Diego County, the report said, giving the region its best grade ever — a B — in 2019.

Why is Bakersfield so polluted?

Both Bakersfield and Fresno are in California's Central Valley, where the air is laden with PM2. 5 because of high volume of oil and gas drilling and diesel engines in the area. The Central Valley is also topographically cursed—it's shaped like a bowl, so pollution is often trapped, unable to disperse.

What color is the air quality today?

The Air Quality Index and Your Health
ColorLevel of Health ConcernAQI Values
YellowModerate51 to 100
OrangeUnhealthy for sensitive groups101 to 150
RedUnhealthy151 to 200
PurpleVery Unhealthy201 to 300

Can I burn my fireplace today?

Residents living in Orange County and non-desert portions of Los Angeles, Riverside and San Bernardino counties are prohibited from burning wood in their fireplaces or any indoor or outdoor wood-burning device, including burning manufactured fire logs. Gas and other fireplaces that do not burn wood are not affected.

What is good air quality index?

As Air Quality Index values rise, more of the public becomes vulnerable. An AQI between 0 and 50 is good. A level of 51-100 is acceptable, but a few people who are sensitive to certain pollutants may have reactions.

What causes air quality?

What Causes Air Pollution? The Short Answer: Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.

What is the quality of air today?

Air Quality Scale
AQIAir Pollution Level
0 - 50Good
51 -100Moderate
101-150Unhealthy for Sensitive Groups
151-200Unhealthy

Where in California is Fresno?

Fresno is located in the center of the San Joaquin Valley of Central California, approximately 200 miles (322 km) north of Los Angeles, and 170 miles (274 km) south of the state capital, Sacramento, and 160 miles (257 km) east of Seaside on the Pacific Ocean. Metropolitan Fresno has a population of 1,107,416.

What are pm2 5 particles?

PM2. 5 refers to atmospheric particulate matter (PM) that have a diameter of less than 2.5 micrometers, which is about 3% the diameter of a human hair. They are even smaller than their counterparts PM10, which are particles that are 10 micrometres or less, and are also called fine particles.

Why is Temecula air quality bad?

Poor air quality results in potential health hazards and often produces a hazy, unattractive ceiling of smog above the basin. This is due to the Lake Elsinore Convergence Zone, where coastal winds block air pollutants from the rest of the South Coast Air Basin.

Does San Diego have bad air quality?

SAN DIEGO — The state of California had the worst air quality in America in 2018, according to a recent study published by CPAP.com. The study attributes the poor air quality in California in 2018 to industrial output in the state as well as the large-scale wildfires that year.

Where in California is the best air quality?

Recently, Los Angeles had some of the best air quality in the world, and San Francisco was in the top 10 as well. Using data from Spare the Air for the Sacramento region last year (2019) recorded four days with Moderate air quality.

Why is San Diego so hazy?

It's created when pollutants from trucks, cars, factories and farms chemically react in the presence of sunlight.

What is the air quality in San Diego today?

Air Quality Forecast
CityForecast Maximum AQI OZONE
Downtown54GOOD
El Cajon67MODERATE
Escondido67MODERATE
Otay Mesa67MODERATE

What is the air quality in California?

California
Reporting AreaCurrent AQIForecast Sunday May 17 May 17
Loading
Los Angeles Area
Antelope Vly 11:00 AM PDT44 OZONE Good67 OZONE Moderate
Anza Vly 11:00 AM PDT42 PM2.5 Good53 PM2.5 Moderate

Is there smog in San Diego?

Yes, ozone and precursor emissions are transported to San Diego from the South Coast Air Basin (the metropolitan areas of Los Angeles, Orange, San Bernardino, and Riverside Counties) during relatively mild "Santa Ana" weather conditions.

Is it smoky in San Diego?

Air quality reports use the Air Quality Index, which represents the higher of two pollutants - PM2. 5 or ozone.

Air Quality Forecast.

Air Quality Index (AQI) ValuesLevels of Health ConcernColors
201 to 300Very UnhealthyPurple
301 to 500HazardousMaroon

What is the air quality in Los Angeles?

Los Angeles Air Pollution: Real-time Air Quality Index (AQI)
CurrentMax
PM2.5 AQI3442
PM10 AQI1519
O3 AQI432
NO2 AQI123

What city in California has the worst air quality?

Bakersfield, California remains the most polluted city in America in terms of spikes in particulate matter, with Fresno coming in second. A “spike” is defined as a day when the concentration of PM2.

Why is California so hazy?

Frequent sunny days and low rainfall contribute to ozone formation, as well as high levels of fine particles and dust. The strong relationship between Air Quality Index (AQI) and ozone levels may be found on air pollution maps. Air pollution in Los Angeles has caused widespread concerns.

Which state produces the most pollution?

Rank
RankJurisdictionCO2 emissions per capita (in metric tons)
-States, D.C. and territories total15.95
-States and D.C. Total16.059
1Texas23.59
2California9.256

Why does California have the worst air quality?

The combination of three main factors are the cause of notable unhealthy levels of air pollution in California: the activities of over 39 million people, a mountainous terrain that traps pollution, and a warm climate that helps form ozone and other pollutants.

How bad is the air in Bakersfield?

Bakersfield, California remains the most polluted city in America in terms of spikes in particulate matter, with Fresno coming in second. A “spike” is defined as a day when the concentration of PM2. 5 rises above the limit set by the US Environmental Protection Agency for acceptably healthy air.

Which of the following contributes most to poor air quality in the Central Valley?

The region's agriculture is responsible for much of the region's pollution. Up until a few years ago, farmers in the region would regularly burn brush and cuttings at the end of the season, creating huge sources of particulate matter in the air.

Is California air pollution bad?

Studies show that pollutants prevalent in California are linked to several health issues, including asthma, lung cancer, birth complications, and premature death. In 2016, Bakersfield, California recorded the highest level of airborne pollutants of any city in the United States.

Why is the Central Valley so hot?

The air from the Pacific Ocean hitting the air from the central valley causes fog in the bay and can chill you to the bone, even in mid-August. The Central/San Joaquin valleys are also very hot in summer, due to its topography and location.

What's wrong with Bakersfield?

There's a lot of pollution. Bakersfield is a big oil company town, and the air quality here is notoriously bad. There are tons of different stores, shopping outlets, bars, and plenty of things to do. You need a car to get around, as there is no suitable public transportation to get you around the city.

Is Bakersfield a safe place to live?

Just like any other city, Bakersfield has its nice and bad areas. We have a main highway splitting the city in two. The west side is relatively more expensive to live and doesn't see much crime. The east side has excellent patches, but for the most part is where almost all the crime occurs.

What state has the worst pollution?

California topped the list, followed by Oregon and Washington. Los Angeles is the city with the worst ozone pollution — LA has topped that list in 19 of the last 20 of these reports.

What city has the worst air quality?

The 24-hour concentration of PM2. 5, the most harmful type of air pollution, is considered unhealthy when it rises above 35.4 μg/m3.
  1. Riverside-San Bernardino-Ontario, CA.
  2. Hilo, HI.
  3. Bakersfield, CA.
  4. Visalia-Porterville, CA.
  5. Phoenix-Mesa-Scottsdale, AZ.
  6. Los Angeles-Long Beach-Anaheim, CA.
  7. Fresno, CA.

Which US city has the worst air quality?

Most-polluted cities by ozone pollution
  • Los Angeles-Long Beach, CA.
  • Visalia, CA.
  • Bakersfield, CA.
  • Fresno-Madera-Hanford, CA.
  • Sacramento-Roseville, CA.
  • San Diego-Chula Vista-Carlsbad, CA.
  • Phoenix-Mesa, AZ.
  • San Jose-San Francisco-Oakland, CA.

Who has the worst air quality?

  • Shouguang, China.
  • Zhengzhou, China.
  • Luohe, China.
  • Shangqiu, China.
  • Weinan, China.
  • Pingdingshan, China.
  • Yanbu, Saudi Arabia.
  • Linfen, China. Twelve years ago, Linfen was the most polluted city in the world, but even then, Beijing was making efforts to curb the city's coal-burning addiction.

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