This standard specifies the water quality requirements of every kind of application function in sea area.
This standard is applicable to the sea area governed by the People's Republic of China.
The provisions involved in the following criteria are quoted in this standard to constitute provisions of this standard, and have the same effect with this standard.
GB 12763.4-91 "The Specification for Oceanographic Survey Observations of Chemical Parameters in Sea Water"
HY 003-91 "Code for Marine Monitoring"
GB 12763.2-91 "The Specification for Oceanographic Survey-Marine hydrographic observations"
GB 7467-87 "Water Quality; Determination of Chromium (6); 1.5 Diphenylcarbahydrazide Spectrophotometric Method"
GB 7485-87 "Water Quality; Determination of Total Arsenic; Silver Diethyldithiocarbamate Spectrophotometric Method"
GB 11910-89 "Water Quality-Determination of Nickel-Dimethylglyoxime Spectrophotometric Method"
GB 11912-89 "Water Quality-Determination of Nickel-Flame Atomic Absorption Spectrometric Method"
GB 13192-91 "Water Quality-Determination of Organic Phosphorous Pesticide in Water-Gas Chromatography"
GB 11895-89 "Water Quality-Determination of Benzo(alpha)-pyrene-Acetylated Paper Chromatography with Fluorescence Spectrophotometric Method"
When the following standards are revised, the latest edition shall be applied.
3.1 Sea water quality classification
The sea water quality may be divided into four classes according to different application functions and protection objectives of sea area:
Class I It is applicable to marine fishery water area, marine natural protection area and rare marine organism protection area.
Class II It is applicable to aquiculture area, bathing beach, movement overseas or recreational area with direct sea water contact for human body as well as industrial water area having direct connection with human edible.
Class III It is applicable to general industrial water area and offshore landscape tourist area.
Class IV It is applicable to ocean port water area and ocean exploitation operating area.
