EDCs Estuary Concentrations ng L-1 or ngg-1 Environmental matrix HQs References
17β-estradiol (E2) Douro River (Portugal) ≅5.5 Water ≅2.75 [22]
Río de la Plata (Argentina) 369.0 Water 184.5 [20]
Yangtze River (China) <0.30 Sediment - [27]
Mondego River (Portugal) 2.8 Water 1.4 [28]
17α- ethynylestradiol (EE2) Ave River (Portugal) >10.0 Water    - [14]
Little River (Australia) <0.2 Water - [18]
Río de la Plata (Argentina) 43.0 Water 430 [20]
Yangtze River (China) <0.1 Water - [27]
Yangtze River (China) <0.7 Sediment - [27]
Mondego River (Portugal) 4.4 Water 44 [28]
Nonylphenol Ave River (Portugal) >250.0 Water - [14]
Sado River (Portugal) >230.0 Water - [15]
Douro River (Portugal) >550.0 Water - [22]
Daliao River (China) 83.6-777.0 Water 0.17-1.6 [23]
Daliao River (China) 1.5-456.0 Sediment - [23]
Taiwan <3.3-1178.7 Water 0.007-2.46 [29]
Mondego River (Portugal) 18.1 Water 0.04 [28]
Nakdong River (Korea) 137.1-10931.5 Water 0.29-22.8 [30]
Suyoung River (Korea) 144.0- 2469.6 Water 0.3-5.1 [30]
Bay of Biscay, Gernika (Spain) 91.9-193.7 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 197.8-257.2 Sediment - [31]
nonylphenol diethoxylate Sado River (Portugal) >900.0 Water - [15]
Douro River (Portugal) >2000.0 Water - [22]
Leça River (Portugal) >2mgL-1 Water - [16]
Mondego River (Portugal) 6.6 Water - [28]
Taiwan <1.2-238.4 Water - [29]
sitosterol Ave River (Portugal) >6.0 Water - [14]
Mondego River (Portugal) 3.1 Water - [28]
Estrone (E1) Sado River (Portugal) >10.0 Water - [15]
Leça River (Portugal) >10.0 Water - [16]
Little River (Australia) 2.5-23.2 Water 0.42-3.86 [18]
Yangtze River  (China) <1.5 Water - [27]
Yangtze River  (China) <1.9 Sediment - [27]
Mondego River (Portugal) 3.2 Water 0.53 [28]
Tributyltin Bay of Biscay, Gernika (Spain) 8.0-28.0 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 1599.0-9377.0 Sediment - [31]
Bisphenol A Daliao River (China) 29.2-124.0 Water <<1 [23]
Daliao River (China) 3.7-25.3 Sediment - [23]
Yangtze River (China) 0.98-43.8 Water <<1 [27]
Yangtze River (China) 1.2-6.5 Sediment - [27]
Mondego River (Portugal) 2.4 Water <<1 [28]
Bay of Biscay, Gernika (Spain) 0.01 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 0.04 Sediment - [31]
4-t-butylphenol Daliao River (China) 3.4-10.6 Water <<1 [23]
Daliao River (China) 1.9-2.1 Sediment - [23]
4-t-Octylphenol Daliao River (China) 0.5-25.6 Water - [23]
Daliao River (China) 0.7-12.1 Sediment - [23]
Mondego River (Portugal) 4.8 Water - [28]
Dahan River Taiwan <1.0-1458.7 Water - [29]
Bay of Biscay, Gernika (Spain) <0.01 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 0.02  Sediment - [31]
4-n-octylphenol Mondego River (Portugal) 2.0 Water - [28]
2,4-dichlorophenol Daliao River (China) 4.6-63.4 Water - [23]
Daliao River (China) 1.2-2.6 Sediment - [23]
Formononetin Mondego River (Portugal) 8.6 Water - [28]
Biochanin A Mondego River (Portugal) 4.6 Water - [28]
Daidzein Mondego River (Portugal) 4.1 Water - [28]
Genistein Mondego River (Portugal) 3.8 Water - [28]
Dibutyltin Bay of Biscay, Gernika (Spain) 3.0-4.0 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 463.0-2380.0 Sediment - [31]
Monobutyltin Bay of Biscay, Gernika (Spain) 4.0-7.0 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 116.0-503.0 Sediment - [31]
Diethyl phthalate Bay of Biscay, Gernika (Spain) 2551.3-6218.1 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 484.1-1665.0 Sediment - [31]
Dibuthyl phthalate Bay of Biscay, Gernika (Spain) 998.23-1010.1 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 175.6-736.6 Sediment - [31]
Di-2-ethylhexyl phthalate Bay of Biscay, Gernika (Spain) 688.0-8871.2 Sediment - [31]
Bay of Biscay, Arrilluze (Spain) 1484.2-2529.7 Sediment - [31]
Table 1: Environmental concentrations of some endocrine disrupting chemicals (EDCs) in water and sediments of different world river estuaries and corresponding hazard quotients (HQ) calculated based on available PNEC values (HQ=Environmental concentration/PNEC).