The marine waterqualitystandard is first category.
本海域为一类海水水质标准。
2
The qualitystandard of water supply source shall comply with the national waterqualitystandard.
城市供水水源的水质应当达到国家规定的水质标准。
3
To treat the produced water from oilfields to meet the injection waterqualitystandard, the physical technology and the chemical technology are often applied.