Bronte Wells
California has some of the worst air quality in the United States, with eight of the ten cities with the highest year-round concentration of particulate matter between 2013 and 2015 located in the state. The state has implemented various measures to tackle this issue, such as the Clean Air Act, which limits the release of chemical pollutants from industrial and chemical plants, and the California Air Resources Board, which establishes health-based outdoor air quality standards. Additionally, California has adopted stricter emission standards for vehicles and ships, and the state has entered agreements with other nations to reduce greenhouse gas emissions. Despite these efforts, air pollution in California continues to harm people's health and the environment, and the state is particularly prone to wildfires, which further contribute to unhealthy air quality.
| Characteristics | Values |
|---|---|
| Air pollution | Smog is the most pervasive form of air pollution in California, with 90% of Californians breathing unhealthy levels of air pollutants. |
| California has some of the worst air quality in the US, with 8 of the 10 cities with the highest year-round concentration of particulate matter between 2013 and 2015 located in the state. | |
| California has strict emission standards for vehicles, with all registered vehicles requiring original equipment from the manufacturer or specific aftermarket parts. | |
| The state has adopted new, stricter emission standards for diesel trucks, oil tankers, and ships to tackle rising smog. | |
| Water pollution | California's water quality standards were not met on 1.6 million acres of its lakes, bays, wetlands, and estuaries in 2011. |
| The Porter-Cologne Water Quality Control Act governs water quality regulation in the state. | |
| Climate change leadership | California has the most progressive laws to fight climate change and is a global leader in the space. |
| The state has entered agreements with several nations and linked cap-and-trade programs with Quebec. | |
| California has established programs to reduce greenhouse gas emissions, including a Zero Emission Vehicle mandate. |
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What You'll Learn
California's strict vehicle emission standards
California has long struggled with poor air quality, with the state's unique geography, weather, and growing population contributing to the issue. In 1967, the California Air Resources Board (CARB) was established to address severe air pollution, and it has since become a leader in climate change initiatives.
CARB has implemented stringent vehicle emission standards, which are stricter than the United States' national Tier regulations. California's Low-Emission Vehicle (LEV) program defines six automotive emission standards, with regulations based on vehicle weight and cargo capacity. The state's vehicle emission standards cover traditional pollutants like ozone and particulate matter, as well as toxic air contaminants (TACs) that can cause serious long-term health effects, even at low levels.
The Federal Clean Air Act (CAA) allows California to set its own emission standards for new motor vehicles and non-road engines, despite the usual prohibition on states enacting such standards. California's unique situation with severe air pollution and its impact on public health has granted it this special dispensation from the federal government. The state's standards are at least as protective of public health and welfare as the federal standards, and other states can choose to follow them if they wish.
To ensure that vehicle emission standards are met, the Bureau of Automotive Repair and CARB conduct roadside smog tests, emissions surveys, and visual tests to check for tampered or damaged emissions components. California has also adopted stricter emission standards for diesel trucks, oil tankers, and ships, aiming to eliminate 10,000 tons of emissions per year. Additionally, the state has a Zero-Emission Vehicle mandate, with plans to introduce 1.5 million hydrogen fuel cell vehicles by 2025.
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The impact of wildfires
California has long struggled with poor air quality, and wildfires are a significant contributor to this issue. The state's hot and dry climate makes it particularly susceptible to wildfires, and climate change is expected to further exacerbate this problem. As global temperatures rise, California is experiencing more frequent and intense droughts, creating ideal conditions for wildfires to spark and spread.
Wildfires release large amounts of particulate matter and ozone precursors into the atmosphere, which can have severe health consequences for residents. Fine particulate matter, known as PM2.5, is of particular concern due to its impact on human health. Wildfires also emit methane, a potent greenhouse gas, and nitrogen oxides, which contribute to smog formation. The smoke from wildfires can spread over vast distances, affecting air quality in areas far beyond the immediate vicinity of the fire. For example, in 2020, smoke from wildfires in Oregon was transported south, reaching the San Francisco area and contributing to the state's air pollution.
To address the impact of wildfires on air quality, California included the wildfire threat within its 2009 Climate Adaptation Strategy. The state is working to reduce the future threat to air quality from wildfires by protecting forests, increasing public awareness of proper land management strategies, and promoting efforts to maintain air quality. California's air quality agencies are also taking steps to mitigate the effects of wildfire smoke, despite it being considered an "exceptional event" under the federal Clean Air Act.
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The role of the California Air Resources Board (CARB)
The California Air Resources Board (CARB) is a government agency within the California Environmental Protection Agency. It was established in 1967 by then-governor Ronald Reagan, who signed the Mulford-Carrell Act, combining the Bureau of Air Sanitation and the Motor Vehicle Pollution Control Board.
CARB's stated goals include attaining and maintaining healthy air quality, and protecting the public from exposure to toxic air contaminants. It also provides innovative approaches to complying with air pollution rules and regulations. CARB has been instrumental in driving innovation in the global automotive industry through programs such as its ZEV mandate. One of CARB's responsibilities is to define vehicle emissions standards.
CARB works with local governments, the business sector, and the public to address California's air quality problems. It has also helped establish regulations that have helped protect the health of Californians, such as reducing the amount of toxic pollutants created by cars. CARB has influenced the development of new technologies, such as the catalytic converter, which can help create cleaner fuels and produce market-friendly low-emission vehicles.
CARB establishes health-based ambient air quality standards to identify safe outdoor pollutant levels for the public, including children and the elderly. It has set standards for eight "traditional pollutants," such as ozone and particulate matter. CARB also identifies other air pollutants as toxic air contaminants (TACs)—pollutants that may cause serious long-term effects, such as cancer, even at low levels.
CARB works with local air pollution control districts to reduce air pollution from all sources. It has implemented policies to reduce emissions of greenhouse gases, such as the Low-Emission Vehicle (LEV) Program standards in 1990 to address smog-forming pollutants. CARB also has a Commercial Harbor Craft regulation aimed at reducing emissions from commercial vessels operating in California's harbors and ports, primarily targeting diesel-powered vessels.
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Water quality regulation
Water pollution is defined by the Federal Clean Water Act as "dredge spoil, solid waste, incinerator residue, sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt, and industrial, municipal, and agricultural waste discharged into water." California has 3 million acres of lakes, bays, wetlands, and estuaries, and in 2011, an Environmental Protection Agency (EPA) study showed that 1.6 million acres of these waters did not meet water quality standards.
The Porter-Cologne Water Quality Control Act governs water quality regulation in California. The state has also been impacted by extreme weather, sea level rise, and wildfires, which have affected the agricultural sector.
California has some of the worst air quality in the US, with eight of the ten cities with the highest year-round concentration of particulate matter between 2013 and 2015 located in the state. The combination of a large population, mountainous terrain, and a warm climate contributes to high levels of air pollution.
To address air pollution, California has implemented the Clean Air Act (CAA), which limits the release of certain chemical pollutants from industrial and chemical plants. The state has also established the California Air Resources Board (CARB), which sets health-based ambient air quality standards and identifies toxic air contaminants. In addition, California has adopted stricter emission standards for vehicles and ships, and is a leader in climate change initiatives, entering agreements with other nations and implementing programs to reduce greenhouse gas emissions.
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Climate change and extreme weather
California, the most populous state in the US, is already subject to drought, wildfires, and extreme weather. The state's varied and volatile climate is expected to become even more unpredictable due to the impacts of climate change.
The state has experienced a series of record-breaking wildfire seasons in recent years, with the 2020 wildfire season being the largest in modern history, burning over four million acres. Warmer temperatures and drier conditions caused by climate change increase the likelihood of wildfires, and a model developed for California's Fourth Climate Change Assessment projected a potential increase of up to 77% in the average area burned and a 50% increase in the frequency of fires exceeding 25,000 acres by 2100.
Heatwaves are another significant concern for California, as they are the natural disaster responsible for the most weather-related deaths in the state and worldwide over the last 30 years. The combination of extreme heat and wildfires disproportionately impacts less affluent communities and communities of color, exacerbating social and economic inequalities. The frequency and intensity of heatwaves are expected to increase due to climate change, posing a growing threat to public health, especially for vulnerable segments of the population such as the elderly, infants, and those with chronic health conditions.
The state is also facing challenges due to rising sea levels, coastal flooding, and coastal erosion. With approximately 85% of California's population living and working in coastal counties, rising sea levels pose a significant risk to human lives, property, and infrastructure. By the end of the century, the sea level along California's coasts is projected to rise by as much as 20 to 55 inches, putting nearly half a million people at risk of flooding and threatening $100 billion in assets.
To address these pressing issues, California has enacted proactive legislation and policies to mitigate and adapt to climate change. The state has a legacy of air quality and energy efficiency programs, and its climate change mitigation policies, such as the California Global Warming Solutions Act of 2006, aim to reduce greenhouse gas emissions. Additionally, initiatives like Energy Upgrade California encourage individuals and businesses to reduce their carbon footprint and embrace clean energy technologies.
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Frequently asked questions
California has implemented the Clean Air Act (CAA) to limit and reduce air pollution. The California Air Resources Board (CARB) establishes health-based standards to identify safe levels of outdoor pollutants. The state has also adopted stricter emission standards for vehicles and ships, and is working to add more hydrogen fuel cell vehicles to the roads.
Water quality regulation in California is governed by the Porter-Cologne Water Quality Control Act. The state has also implemented the Federal Clean Water Act, which defines and aims to reduce water pollution.
California's air pollution is caused by a combination of factors, including its large population, mountainous terrain that traps pollution, and warm climate that forms ozone. Commercial activities, such as shipping and aviation, also contribute significantly to air pollution in the state.
