*4.8. Statistical Analysis*

For each water quality parameter, a Shapiro–Wilk normality test was conducted for each site to determine distribution of the data throughout the sampling period. A one-way analysis of variance (ANOVA) using the Tukey multiple comparisons test was conducted between each site and sample type. *P*-values of < 0.05 were considered statistically significant. Analyses were performed using Prism 8 (GraphPad Software, San Diego, CA, USA). The R functions cor() and cor.test() were used, with a Spearman correction, to determine the direction (positive or negative) and significance of correlation between pairs of water quality characteristics within each sample location [98]. The correlation between the pairs was denoted by the number, r, which varies between –1 and +1, with 0 meaning no correlation, +1 a complete positive correlation, and –1 a complete negative correlation.

**Supplementary Materials:** The following are available online at http://www.mdpi.com/2076-0817/9/7/567/s1; Figure S1: Images of outlets at each sampling location; Figure S2: Scatterplot of turbidity measurements for bulk water samples; Figure S3: Scatterplot of free (A) and total (B) chlorine measurements for bulk water samples.

**Author Contributions:** Conceptualization and methodology, H.Y.B. and J.S.H.; validation, H.B.; formal analysis, H.Y.B. and V.G.-A.; investigation, H.Y.B., B.J.M., J.G.S., and J.S.H.; data curation, H.Y.B.; writing—original draft preparation, H.Y.B.; writing—review and editing, H.Y.B., B.J.M., V.G.-A., J.G.S., and J.S.H.; visualization, H.Y.B. All authors have read and agreed to the published version of the manuscript.

**Funding:** The U.S. Environmental Protection Agency (EPA) through its O ffice of Research and Development funded and managed the research described herein under contract #EP-C−11-006 to Pegasus Technical Services, Inc.

**Acknowledgments:** We would like to thank our EPA colleagues, James Goodrich and Hodon Ryu, for their technical review of this manuscript and Chelsea Hintz, for her assistance with the correlation analyses using R.

**Disclaimer:** This manuscript has been subjected to the Agency's review and has been approved for publication. The views expressed in this article are those of the authors and do not necessarily represent the views or policies of the Agency. Mention of trade names, commercial products, and/or services does not imply an endorsement or recommendation for use by the U.S. Government or EPA.

**Conflicts of Interest:** The authors declare no conflict of interest. With EPA funding, researchers designed the study; collected, analyzed, and interpreted the data; and wrote the manuscript intended for publication.
