Each region in the country which complies with the NAAQSs is put into one of three classes.
全国符合《全国环境空气质量标准》的各个地区，都被划分为三类。
ambient air quality standard
GB3095-1996环境空气质量标准
In establishing national ambient air quality standards, the EPA Administrator is not permitted to consider the feasibility of attaining them.
在建立《国家环境空气质量标准》时，环境保护局的局长不允许考虑达到标准的可行性。
From 2002 to 2004, the quality of ambient air in urban area of Qinzhou city reach national secondary standard.
2002年至2004年，钦州市区环境空气质量达国家二级标准。
Urban Air Quality in Key Environmental Protection Cities In the 47 key environmental protection cities, 19 of them have attained the Grade II standards for urban air quality.
环保重点城市空气质量47个环保重点城市中，19个城市环境空气质量达到空气质量二级标准。
In 2001, the annual average of NO2 concentration in the air of 341 cities attained the Grade II national standards for air quality.
2001年，341个城市空气中二氧化氮浓度年均值均达到国家环境空气质量二级标准。
Article 6 The administrative department of environmental protection under the State Council shall establish national standards for atmospheric environment quality.
第六条 国务院环境保护行政主管部门制定国家大气环境质量标准。
Standard methods for radon measurement in environmental air
GB/T14582-1993环境空气中氡的标准测量方法
Air and surface water quality in all urban districts in 47 major cities should meet related national standards by the end of 2000.
到2000年底,47个重点城市的空气和地面水达到国家规定的环境质量标准
2. Air and surface water quality in all urban districts in 47 major cities should meet related national standards by the end of 2000.
2. 到2000年底，47个重点城市的空气和地面水达到国家规定的环境质量标准
By the end of year of2000, the air and surface water quality of the47 major cities will meet the national standard of environment.
到2000年底，47个重点城市的空气和地面水达到国家规定的环境质量标准。
The environmental quality standards and pollutant discharge or emission standards are divided into state standards and local standards.
环境质量标准、污染物排放标准分为国家标准和地方标准。
Environmental quality standard for soils
GB15618-1995土壤环境质量标准
d emission standard
空气质量和排放标准
We present the National Primary and Second Ambient Air Quality Standards as upper bound guideline.
我们把国家一级和二级环境大气质量标准作为上限控制线。
The Study of Air Environment Capacity and Time Limit Satisfying Project in Lhasa City;
拉萨市大气环境容量及环境空气质量限期达标方案研究
Construction management scheme conformed to the quality,environmental and safety standards
质量环境安全标准在施工组织设计中的应用
Clean Air Act Amendment (1987) established a national air-quality standard for ozone.
1987年洁净空气法修正案建立了空气的国家空气质量标准。