Table 3.

Estrogen concentrations in influents and effluents from WWTPs (Anna Szymonik 2013; Włodarczyk-Makuła 2016)

Estrogen	Wastewater treatment plant influents (ng/dm3)	Wastewater treatment plant effluents (ng/dm3)	Detection limits (ng/dm3)	Hormone content in Polish rivers (ng/dm3)
				Odra	Kanał Gliwicki	Wisła
Estrone (E1)	0.5–670.0	0.2–196.7	0.19	1.3	1.1	lod
Estradiol (E2)	0.6–188.7	0.5–64.0	0.39	lod	lod	1.3
Estriol (E3)	0.5–80.0	0.4–39.1	0.24	lod	lod	lod
17α-ethinylestradiol (EE2)	0.5–19.9	0.59–5.6	0.33	lod	lod	lod

*lod limit of detection

Sources of hormones in the aquatic environment