Fig. 4. Mean (N = 6; SD) estrone (E1), 17b-estradiol (E2), 17a-ethinylestradiol (EE2) and testosterone (T) in effluents from a municipal wastewater treatment plant and two onsite wastewater treatment systems receiving common influent. One-way
ANOVA with Student–Newman–Keuls post hoc test (a = 0.05). ⁄p