E1 E2 E3 EE2 MeEE2 Refe- rences Estimated Sewage influent (ng/L) 12-102 5-44   49-115 1.1-5.1 N.D.^b) (14;20) Sewage effluent (ng/L)^a) 0.6-51 0.3-22 2.5-58 0.06-2.6 N.D. b) (14;20) Sewage sludge (ng/g) 2.7-25 >1-5.1 N.D. b) N.D. b) N.D. b) (21) Surface water (ng/L) 0.22-2 0.27-2.5 N.D. b) 0.02-0.24 N.D. b) (22) Sediment (ng/kg) 0.71-16 1.5-33 N.D. b) 0.51-9.8 N.D. b) (22) Measured Sewage influent (ng/L) 44-490 11-180 <LOD-263 <LOD-120 5.3-120 (23-25) Sewage effluent (ng/L) <LOD-82 <LOD-21 <LOD-28 <LOD-62 N.D. b) (3) Sewage sludge (ng/g) <LOQ-37 <LOQ-49 N.D. b) <LOQ-17 <LOQ (26) Surface water (ng/L) <LOD-17 <LOD-8.8 <LOD-3.1 <LOD-5.1 N.D. b) (3;19) Sediment (ng/g) <LOQ-2 <LOQ-1.5 N.D. b) <LOQ-0.9 <LOQ (26) a) Concentrations in sewage effluent are estimated assuming 50-95% removal. b) N.D. indicates that no data are available in literature. 2.2.3   Release of estrogens from farm animals