A wide selection of pollutants in several estuarine environments exposed to different types and grades of pollution were evaluated. The obtained data from the combination of both, a complete set of pollutants and a range of areas with different degrees of exposure to pollution, was used to analyze the pollutants presence, levels and sources, and finally to determine benchmark values of organic and inorganic pollutants that permit a detailed classification and interpretation of the environmental status of estuarine areas.

The analysed pollutants include organic compounds: polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) metalloid (As) and metals: Li, Al, Cr, Mn, Fe, Ni, Cu, Zn, Cd, Hg and Pb. This set of pollutants was determined in sediments from estuarine areas with different pollution and industrialization grades. The treated data was used to identify benchmark stations and define benchmark values.

Therefore this paper offers both, a critical evaluation of the environmental status of 4 estuarine regions of great economic importance and a tool to identify and perform a categorization of other areas based on their pollutants levels. So on, this paper conclude useful values that will allow an intercomparison with other environmental areas.

评估了几种河口环境中暴露于不同类型和等级污染的多种污染物。从全套污染物和暴露程度不同的一系列区域中获得的数据，用于分析污染物的存在，水平和来源，最后确定有机和无机污染物的基准值可以对河口地区的环境状况进行详细的分类和解释。

分析的污染物包括有机化合物：多环芳烃（PAH），多溴联苯醚（PBDE），多氯联苯（PCB），有机氯农药（OCP）准金属（As）和金属：Li，Al，Cr，Mn，Fe，Ni ，Cu，Zn，Cd，Hg和Pb。这套污染物是在河口地区具有不同污染和工业化等级的沉积物中确定的。处理后的数据用于识别基准站并定义基准值。

因此，本文既提供了对四个具有重要经济意义的河口地区的环境状况的重要评估，又提供了根据其污染物水平识别和执行其他地区分类的工具。因此，本文总结了有用的价值，可以与其他环境领域进行比较。