Ozone is among the most dangerous gaseous pollutants and a critical component of smog. While annual averages for particulate pollution pass most guidelines, the city continues to struggle with ozone pollution. Majid Ezzati, from Imperial’s School of Public Health, concluded in a recent study that further lowering the PM2.5 standard below the current level can provide an opportunity to save more lives and equalize the health of New York residents across income levels. 2 A PM2.5 reduction of 10% could reduce the number of deaths and hospital emissions by 300 and 200, respectively. The New York Health Department estimates that PM2.5 pollution contributes to more than 3,000 deaths and 2,000 hospital admissions for coronary and respiratory conditions annually. 1 Current New York air pollution levels continue to threaten communities, particularly lower-income neighborhoods, and raise the risk for heart and lung health complications.
300 MBAR TO PSI FREE
While low PM2.5 levels meeting the < 10 μg/m 3 target are recommended, the WHO advises that no level of exposure has been shown to be free of health impacts. These annual PM2.5 levels are comparable to the air quality of Taos, New Mexico and Waco, Texas (6.9 and 6.8 μg/m 3, respectively). Since at least 2017, New York air quality has consistently fallen within this target (2017, 2018, and 2019 averaged 6.8, 7, and 7 μg/m 3 respectively). The World Health Organization (WHO) uses a slightly more stringent threshold for PM2.5 levels than the US EPA (< 10 μg/m 3). PM2.5, or fine particulate matter, is a dangerous and prevalent air pollutant, widely regarded as one of the most harmful to human health. For the last three years (2017, 2018, and 2019), New York’s air quality index (AQI) has remained less than 50, or “good.” The US Environmental Protection Agency (EPA) defines “good” air quality as air that poses little to no risk to health. Psi to Kilopascal Conversion Table Psi ġ5 psi = 15 × 6.8947572932 kPa = 103.What is the air quality in New York City?ĭespite being the most populous city in the United States, New York City has relatively clean air on average. This is true of most countries, including the United States.
The kilopascal is more prevalent in scientific contexts such as material science, engineering, and geophysics. Exceptions include certain countries that use either the imperial or United States customary systems of measurement, such as the United States, in which the unit of pound per square inch is more commonly used.
In 1971, at the 14 th General Conference on Weights and Measures, the pascal was adopted as an SI derived unit of pressure.Ĭurrent use: The kilopascal is widely used worldwide in countries that have adopted SI. The kilopascal is simply a multiple of the pascal, as is common within SI. History/origin: The unit, pascal, is named after Blaise Pascal, a French mathematician and physicist. A kilopascal is defined as 1,000 Pa, where 1 Pa is defined as the pressure exerted by a 1 newton force applied perpendicularly to an area of one square meter, expressed as 1 N/m 2 or 1 kg/m Kilopascalĭefinition: A kilopascal (symbol: kPa) is a multiple of the pascal (Pa), an SI (International System of Units) derived unit of pressure used to measure internal pressure, Young's modulus, stress, and ultimate tensile strength. Although the pascal is more widely used in scientific contexts, psi is more often used in everyday contexts, particularly in countries like the United States as well as others under the US customary or imperial systems of units. As such, the prototype pound at the time was known as the avoirdupois wool pound.Ĭurrent use: The psi is fairly widely used to measure numerous pressures, such as tire pressure, scuba tank pressure, natural gas pipeline pressure, among others. The system is believed to have come into use in England around 1300 and was used in the international wool trade. It is based on the avoirdupois system, a system that uses weights in terms of the avoirdupois pound, which was standardized in 1959.
History/origin: Pound-force per square inch is a unit that originated in the imperial and US customary systems of units.
One psi is approximately 6,895 pascals (N/m 2). It is defined as the pressure that results when a force of one pound-force is applied to a one-square-inch area. Definition: A pound-force per square inch (symbol: psi) is an imperial and US customary unit of pressure based on avoirdupois units.
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