Table 2
Mean nitrog en species measurements (±SD) of the effluents of a municipal wastewater treatment plant and two on-site wastewater treatment systems in the Waco Metropolitan Area Regional Sewerage System over a 21 d period. One-way ANOVA with Student–Newman–Keuls post hoc test (a = 0.05). Mean values with the same letter are not significantly different (p < 0.05).