Don't let ground-level ozone ruin your summer fun

Summer is definitely here. It’s hot, it’s sunny, it’s the time of year you want to be outside. With all that fun in the sun, though, can come a form of air pollution we’re definitely not excited about: ground-level ozone. 

Ecology keeps a close eye on ground-level ozone levels around Washington and issues advisories when levels rise to a point that could affect people’s health. Let’s talk about what ground-level ozone is, what it can do to your health, how you can help prevent it, and how to find out when levels are unhealthy.

Why should I care about ground-level ozone?

First, let’s distinguish the difference in ozone and ground-level ozone.

• “Good” ozone forms naturally one to 30 miles above the Earth’s surface. This ozone layer protects life from the sun’s harmful rays.
• “Bad” ozone forms at ground-level. It is the main ingredient of smog and can cause a plethora of health problems.

Today, we are going to talk about how ground-level ozone forms, the health problems it causes, and what to do about it.

How it forms

Ground-level ozone is a gas created by a chemical reaction between nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the presence of sunlight. Vehicle and industrial emissions, gasoline vapors, chemical solvents, and natural sources emit NOx and VOCs that help form ground-level ozone. 

Obviously, urban areas will see higher amounts of ground-level ozone because they tend to have more air pollutants. But rural areas may not be spared from the health effects of it. Ground-level ozone takes time to form, and while it’s forming the wind can carry it far away. So, even if you live in the country, you can still be exposed to ground-level ozone.

What it can do to your health

Unhealthy amounts of ground-level ozone can affect everyone, but people with lung disease, children, older adults, and people who are physically active are especially sensitive. Ground-level ozone can:

• Irritate your throat.
• Cause coughing, wheezing, and painful breathing.
• Inflame and permanently damage lung tissue.
• Aggravate asthma, emphysema, and chronic bronchitis.
• Increase the likelihood of pneumonia and bronchitis.

To protect your health, do less strenuous activities outdoors or stay inside until it cools down. If you experience serious symptoms, see your doctor.

How you can help reduce ground-level ozone

On hot days when ground-level ozone is expected to reach unhealthy levels, take these extra steps to help reduce air pollution:

• Drive less. Combine errands or use public transportation.
• Switch to a zero emissions vehicle, walk, or ride a bike.
• Postpone travel until the weather cools when possible.
• Don’t use lawnmowers or other small engines during heat spells.
• Follow burn bans.
• Don’t barbecue or use your fire pit while it’s hot out.
• Don’t let your engine idle.
• Refuel your vehicle in the early mornings.
• Don’t paint or use aerosol sprays until temperatures cool off.

When it gets hot outside, keep an eye on Ecology’s Facebook page or Twitter account for air quality advisories or check Washington’s Air Quality Monitoring Network. 

To learn more about ground-level ozone and other air quality topics, visit Ecology’s website.
 
By Kim Vaughn / Air Quality

The best solution is less pollution … 50 years of the Clean Air Act

(This is the second post of a three-part series.) 

Fifty years ago, Washington’s Clean Air Act was adopted in order to improve air quality for

Washingtonians. Since that time, much has been done to reduce harmful pollutants that effect our environment and people’s health. 

One of the many benefits of the good work started years ago, if maintained, is that that you, and future generations, can enjoy our majestic mountain wilderness areas. 

Seeing clearly through the haze

If you’ve ever looked out at Mt. Rainier, or any other scenic vista from far away and it appears hazy or blurry, chances are, those aren’t clouds blocking your view. It’s likely air pollution, also referred to as regional haze, and it’s one of the many air quality issues we’ve been working to improve.

Regional haze is formed by particulate matter that absorbs and scatters light. It can travel a

The same view with different amounts of
particulate matter in the air.

very long distance and individual particles are too small to see with your eyes. The more particles in the air, the harder it is to see far away. It also can cause serious health problems when inhaled. 

What makes up air pollution?

Air pollution and smoke are made up of hundreds of different complex mixtures of gases and fine particles; like soot, dust, and dirt.

Many of these mixtures contain harmful primary pollutants like: 

• Sulfur dioxides. Gases that form when sulfur is exposed to oxygen at high temperatures during fossil fuel combustion, volcanic eruptions, oil refining, or metal smelting. At high concentrations it can dissolve in clouds and chemically combine with oxygen to form sulfuric acid, otherwise known as acid rain. 
• Nitrogen oxides. A group of gases composed of nitrogen and oxygen. Two of the most common nitrogen oxides are nitric oxide and nitrogen dioxide. Nitrous oxide is a greenhouse gas that contributes to climate change. Nitrogen oxides are produced by the burning of fuels from many things such as vehicles, power plants, industrial, commercial and manufacturing facilities.
• Volatile organic compounds. These are chemicals that can easily become vapors or gases. Along with carbon, they contain elements such as hydrogen, oxygen, fluorine, chlorine, bromine, sulfur, or nitrogen. Gasoline-burning engines are a major source but they are also found in many products used daily, such as paint and household cleaners. 

When nitrogen oxides and volatile organic compounds interact in sunlight, they create ground-level ozone, a secondary pollutant. Ground-level ozone is a harmful, colorless, and highly irritating gas that forms just above the Earth's surface. This is not the same as stratospheric ozone in the upper atmosphere that protects us from the sun’s ultraviolet rays.

Effects of pollutants on the environment

Even though many of these compounds are found in nature, having too many of them can:

• Make lakes and streams acidic; harming aquatic life and economically damage fishing industries. 
• Change nutrient balances in water and soil; causing damage that can’t be repaired. 
• Cause damage to forests; resulting in a loss of wildlife habitat.
• Damage crops; resulting in economic loss. 
• Contribute to acid rain; that stains and erodes monuments.  
• Affect the diversity of ecosystems; by limiting their ability to function and grow, such as during oxygen-robbing algal blooms.

Effect of pollutants on human health

Air pollutants, like fine particles and ozone, can harm people’s health. As pollution levels rise, the number of trips to the doctor due to pollution-related illnesses may also increase. Air pollution is a real public health concern because it can cause or contribute to serious health problems like:

• Headaches
• Premature death in people with heart or lung disease.
  
• Heart attacks.
• Irregular heartbeat.
• Aggravated asthma symptoms.
• Decreased lung function.
• Irritation of the eyes and airways causing coughing or difficulty breathing.
• Respiratory infections
• Cancer.
• Increased health care costs.

People at the most risk are children, pregnant women, the elderly, and those with cardiovascular or respiratory disease. Health effect research shows that death rates in several U.S. cities increased when there were higher levels of particulate matter in the air. 

Coming soon

Our third and final blog will discuss things you can do to minimize your contribution to air pollution and what Ecology is doing to protect human health and the environment. Working together, we can ensure healthy air for another 50 years and future generations!
If you’re interested in seeing what the air quality is like in your community, check out our monitors your area by visiting Washington’s Air Monitoring Network. 

To learn more about the history of our state's Clean Air Act visit WaCleanAir50.org

Part I: We’ve come a long way baby … celebrating 50 years of the Clean Air Act

Part 3: A breath of fresh air ... 50 years of the Clean Air Act

By Kim Allen, Air Quality

wacleanair50.org

Hot weather may cause air pollution issues in Washington

By Camille St. Onge | Air Quality

The warmer-than-usual weather expected in Washington may set conditions for health-harming ozone pollution (smog) in the coming days and throughout the summer.

GEEKY SMOG FACTS

Smog is a harmful pollutant that forms when sunlight interacts with pollution mainly from cars and trucks. 

The pollutants from tail pipes are nitrogen oxides and volatile organic compounds. The hot sunlight bakes the pollutants together and forms harmful smog.

When people hear the word ozone they usually think about the ozone layer found high in the upper atmosphere (the stratosphere) that shields us from much of the sun's ultraviolet radiation. However, ozone air pollution at ground level where we breathe it (in the troposphere), causes serious health problems.

IT'S LIKE A SUNBURN ON YOUR LUNGS
Smog aggressively attacks lung tissue and has harmful effects on peoples' health. You might think of it as sunburn on your lungs. Breathing smog can lead to several types of health problems.

Difficulty breathing and lung damage: Because of smog's effect on lung function, it can make it feel difficult to breathe deeply, especially during exercise. Research has shown

that ozone exposure can also damage the lining of your lungs.

Worsening asthma symptoms: If you suffer from asthma, being exposed to high levels of smog can trigger asthma attacks.

Coughing and throat/chest irritation: High levels of ozone can irritate your respiratory system. These types of mild symptoms usually only last for a few hours after you've been exposed to smog. However, ozone can continue to harm your lungs even after symptoms disappear.

ONE THING YOU CAN DO TO REDUCE SMOG POLLUTION
There are a number of things we can all do to reduce harmful smog. Since pollution from cars and trucks is the largest source of smog, you might think about how you can drive less. 
Changing habits can be hard. So if you are considering driving less, start with one thing, just once a week:

• Carpool with a coworker.
• Take the bus.
• Work from home.
• Ride your bike to the store or work.
• Walk somewhere.

 WAYS YOU CAN AVOID SMOG EFFECTS

There are things you can to reduce your exposure to smog. Smog levels are generally lower in the morning when the weather is cooler. Plan your outdoor activities, like running or gardening, for morning time.

The Environmental Protection Agency also has an app that provides a smog forecast:

• Download the free AirNow app for iPhone or Android.
• Sign up for AirNow EnviroFlash, a free service that sends air quality info to your e-mail or mobile phone e-mail address. 
• The National Oceanic and Atmospheric Administration (NOAA) provides additional Air Quality Forecast Guidance.

And, you can visit Ecology’s online air quality map to see what levels are like in your area.

Commuter Resources for bus, rail and ride sharing: King County Metro Transit,  Rideshare; Sound Transit, Spoke Regional Transit, Vancouver C-Tran, Whatcom transportation Authority