休斯敦的空气质量

休斯敦的空气质量指数(AQI)和PM2.5空气污染

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天气

休斯敦现在的天气怎么样?

天气Broken clouds
温度93.2 oC
湿度57 %
风速和风向6 mp/h
气压1012 mb

实时AQI城市排名

实时美国 热门城市排名

#city美国 AQI
1Union

167

2Laurel

126

3Anthony

124

4米申

107

5University City

107

6Centreville

95

7San Tan Valley

95

8Mecca

93

9South Padre Island

92

10Wildwood

91

  (当地时间)

查看世界AQI排名

实时休斯敦 AQI排名

实时休斯敦空气质量排名

#station美国 AQI
1Clinton C403

82

2Houston East C1

44

3Monarch Oaks Street

36

4Shady Acres

32

5Haden Road 2

31

6Cypress Station

30

7Haden Road 3

30

8AAH - Central Business District

28

9Rice Military

28

10Washington Avenue Coalition / Memorial Park

28

  (当地时间)

查看世界AQI排名

美国 AQI

30

实时空气质量指数(AQI)
优秀

概览

休斯敦现在的空气质量指数(AQI)是多少?

空气污染等级空气质量指数(AQI)主要污染物
优秀30 美国 AQIPM2.5
污染物浓度
PM2.5
7.1 µg/m³

健康建议

休斯敦空气污染,如何做好防护?

Open your windows to bring clean, fresh air indoors
Enjoy outdoor activities

预报

休斯敦空气质量指数(AQI)预报

污染等级天气温度风速和风向
星期六, 7月 4

优秀

星期日, 7月 5

优秀

星期一, 7月 6

优秀

今天

中等

96.8° 80.6°

11.2 mp/h

星期三, 7月 8

优秀

98.6° 80.6°

8.9 mp/h

星期四, 7月 9

优秀

102.2° 80.6°

4.5 mp/h

星期五, 7月 10

优秀

102.2° 80.6°

6.7 mp/h

星期六, 7月 11

优秀

104° 80.6°

6.7 mp/h

星期日, 7月 12

优秀

104° 82.4°

6.7 mp/h

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休斯敦历史空气质量图表

如何更好地远离空气污染侵害?

减少您在休斯敦 空气的污染暴露值

休斯敦 空气质量分析和数据

What is the air quality in Houston?


In recent years, Houston’s average annual air quality has met the US Environmental Protection Agency (EPA) qualification for “good,” indicating that the air generally poses little risk to health. Since annual averages smooth over elevated periods of pollution, they can fail to portray potential risks accurately. Despite an annual “good” air quality index, there have been a number of unhealthy pollution days in recent years which have caused Houston to continually fail to meet federal attainment levels for daily ozone and PM2.5.


An air quality index (AQI) value is calculated by weighting six criteria pollutants for their risk to health in a formula. Fine particulate matter (PM2.5) and ozone are weighted more heavily for their high risk to human health, and as a result, PM2.5 and ozone most often determine overall AQI.


PM2.5 is fine airborne particulate matter measuring 2.5 micrograms or smaller. Due to its microscopic size, PM2.5 is able to penetrate deep into the lungs and then into the bloodstream, potentially causing a wide range of short- and long-term health effects. Exposure to PM2.5 has been directly linked to conditions such as heart and lung disease and early death.


In 2019, Houston exceeded the PM2.5 recommendation set forth by the World Health Organization (10 μg/m3) by 0.8 μg/m3. November (14.8 μg/m3), December (13 μg/m3), and March (12.7 μg/m3) experienced particle pollution levels defined as US AQI “moderate” – air that poses some risk to sensitive groups, including children, the elderly, and people with pre-existing cardiovascular or respiratory health conditions.


An analysis conducted by the Environmental Defense Fund and the Harvard School of Public Health estimated that Houston’s PM2.5 pollution has contributed to more than 5,000 early deaths and $49 billion in economic damages in 2015 alone.1 Such high annual costs highlight a need to further tighten PM2.5 standards. A study conducted by the US EPA revealed that reducing the federal limit for annual PM2.5 from 12 μg/m3 to 9 μg/m3 could save as many as 12,150 lives a year.2 In Houston, it is evident more stringent standards are needed. 75 percent of the health burden is carried by communities who already exceed the current federal PM2.5 standard.


Ozone is a gaseous pollutant and component of smog formed in the atmosphere when sunlight causes nitrogen oxides and organic substances to react. Like PM2.5, ozone can also cause respiratory infections, inflammation, and early death.


According to the 2019 State of the Air report by the American Lung Association, Houston ranks 9th nationally for worst ozone pollution with a weighted average of 26.7 days annually exceeding standards.3 That’s nearly a month of dangerous ozone levels per year.


Houston’s relatively high average temperatures, abundant sunshine, large oil and energy industry and dispersed population make it challenging for the city to reach attainment levels. The city has never, in fact, met daily attainment levels for ozone.


Air quality data changes hourly, based on emissions and weather. Check real-time air quality levels in Houston at the top of this page and follow Houston’s forecast air quality data to take proactive steps in reducing exposure to unhealthy air.



Has air quality improved in Houston?


Like much of the United States, Houston’s air pollution has improved over recent decades as a result of increasingly stringent regulations on a wide variety of industries. Just twenty years ago, Houston often swapped ‘most polluted’ titles with Los Angeles. Today, Houston’s air quality is much improved, though still relatively high compared to the US average. According to the 2019 World Air Quality Report, Houston ranks 244th out of 1517 included cities for highest PM2.5. Moreover, the city has seen a recent rise in both PM2.5 and ozone pollution since at least 2017.


For fine particulate matter, or PM2.5, Houston experienced a 7.8% increase from 2017 to 2018, and another 11.3% increase from 2018 to 2019. These increases, though subtle, show a concerning trend. But a steadily growing population and economy does not need to be a reason for more emissions. Shifting towards cleaner energy and more fuel-efficient low emission vehicles are two impactful ways to greatly reduce Houston’s air pollution levels.


For ozone, Houston experienced its highest record from 1997 to 1999, when there was a weighted average of 110 unhealthy air days. This number has fallen dramatically since, yet the most recent average of 26.7 days is still nearly 8 times the US EPA attainment limit.


‘Stay-at-home’ measures implemented during the 2020 COVID-19 pandemic have resulted in some city-wide pollution reductions, including a 13% drop in ozone.4 As the economy opened back up, movement and industry quickly returned to ‘normal’ levels, with pollution reductions just as quickly diminishing.



Why does Houston have unhealthy air quality?


Houston’s unhealthy air quality is primarily attributable to ozone pollution. Warm urban climates are naturally predisposed to higher ozone levels because they provide ideal environmental conditions for ozone formation, such as sunshine, heat, and abundant precursor pollutants.


Like most big cities, air pollution seems an inevitable byproduct of the area’s population and economy. There are 7 million people, 5 million registered vehicles, and 121,000 industrial businesses in the greater Houston area. The Port of Houston is one of the nation's busiest, producing 4.1 tons of smog-forming pollution each year.5


In addition to these emission contributors, global warming is expected to exacerbate ozone levels by providing warmer temperatures ideal for ozone formation.


60 percent of Houston’s ozone pollution is estimated to result from vehicle exhaust alone. During the COVID-19 pandemic, ‘stay-at-home’ measures are likely to have contributed to the city’s improved air quality by keeping cars off the road in significant numbers. Houston saw a 13% reduction in ozone during this time. While short-term, these improvements shed light on what is possible by transitioning residents to more fuel-efficient, low-emission vehicles and investing in mass public transit.


Higher density areas tend to have higher pollution levels. Downtown Houston AQI, for example, tends to be much higher than the greater Houston area. Use the air pollution map of Houston to understand local variances across the city.



+ Article Resources



[1] Roy A. (2020, May 11). Amid COVID-19, the Trump administration sets dangerous air pollution standards. What is at stake for Houstonians? Environmental Defense Fund.
http://blogs.edf.org/health/2020/05/11/pm-standards-houston-analysis

[2] Environmental Protection Agency. (2019). Policy assessment for the review of the national ambient air quality standards for particulate matter, external review.
https://www.documentcloud.org/documents/6384811-2019-9-5-Draft-EPA-Assessment-for-PM2-5-NAAQS.html

[3] American Lung Association. (2019). State of the Air – 2019.
http://www.stateoftheair.org/assets/sota-2019-full.pdf

[4] Rogalski J. (April 10, 2020). A side effect of COVID-19 crisis: Houston's air is cleaner. WQAD 8.
http://blogs.edf.org/health/2020/05/11/pm-standards-houston-analysis/

[5] Environmental Defense Fund. (2020). Cleaner air in port cities.
https://www.edf.org/climate/cleaner-air-port-cities#:~:text=EDF%20estimates%20that%20the%20prolonged,the%20Houston%2DGalveston%20Area%20Council

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