Fecal bacteria contamination of floodwaters and a coastal waterway from tidally-driven stormwater network inundation

Inundation of coastal stormwater networks by tides is widespread due to sea-level rise (SLR). The water quality risks posed by tidal water rising up through stormwater infrastructure (pipes and catch basins), out onto roadways, and back out to receiving water bodies are poorly understood but may be substantial given that stormwater networks are a known source of fecal contamination. In this study, we (1) documented temporal variation in concentrations of Enterococcus spp. (ENT), the fecal indicator bacteria standard for marine waters, in a coastal waterway over a two-month period and more intensively during two perigean spring tide periods, (2) measured ENT concentrations in roadway floodwaters during tidal floods, and (3) explained variation in ENT concentrations as a function of tidal inundation, antecedent rainfall, and stormwater infrastructure using a pipe network inundation model and robust linear mixed effect models. We find that ENT concentrations in the receiving water body var..., , , # Fecal bacteria contamination of floodwaters and a coastal waterway from tidally-driven stormwater network inundation

[https://doi.org/10.5061/dryad.sxksn039s](https://doi.org/10.5061/dryad.sxksn039s)

## Description of the data and file structure

This dataset includes four data types:

**Water quality data**: Enterococcus spp. (ENT) concentrations enumerated using the IDEXX Enterolert standard protocol with the Quanti-tray 2000 (IDEXX, ASTM Method D6503-99). Data from baseline conditions are in the file `idexx_baseline.csv`; data from perigean conditions are in the file `idexx_perigean.csv`, and all data including floodwater ENT concentrations are in the file `idexx_all.csv`. The columns include the following:

* Sample ID: Unique sample identifier for water collection laboratory analysis.
* Datetime: Date and time stamp of when the water sample was collected in Eastern Standard Time (EST).
* Date: Date stamp of when the water sample was collected in EST.
* Time: Time stamp...