Articles

Contributing
TADA Module 1: Training for Beginner R Users: An introduction to major TADA Module 1 functions for users unfamiliar with R and RStudio.
TADA Module 1: Water Quality Portal Data Discovery and Cleaning: An overview of TADA Module 1 Data Discovery and Cleaning functions and a recommended workflow.
TADA Module 1: Training for Intermediate/Advanced R Users: A foray into major TADA Module 1 functions for users familiar with R and RStudio.
TADA Module 2: Geospatial Functions: An overview of TADA Module 2 functions and a recommended workflow focused on A) creating an ATTAINS assessment unit/WQP monitoring location crosswalk, B) reviewing assessment units and monitoring locations on a map, C) submitting an up to date assessment unit/WQP monitoring location crosswalk to ATTAINS, and D) assigning uses to assessment units.
Example Module 3 Workflow: Recommended TADA module 3 Criteria and Methodology Table generation (under development) showcasing water quality data analysis functions and example workflows.
TADA Module 3A: Associating WQP Characteristic Names with Applicable ATTAINS or EPA 304(a) Criteria Search Tool (CST) Parameter and Use Names: The first of multiple Module 3 vignettes (under development) showcasing water quality data analysis functions and example workflows.
TADA Module 3: Alternative Options to Generate the Criteria and Methodology template for User Input: A vignette (under development) showcasing alternative ways to generate the criteria and methodology file.

Workshops and Demos

TADA: Assessment Unit Use Case Demo: An overview of a TADA use case for a single Assessment Unit.
WQX 3.0 Migration
WQX QAQC Service User Guide
Geospatial Data Integration
Participatory (Volunteer) Scientists are Monitoring Waters and Sharing Data via EPA's Water Quality eXchange (WQX)
TADA Cybertown Workshop June 2025: An introduction to using the EPATADA R package to retrieve, clean, analyze, and visualize WQP data.
TADA: WaterSciCon Workshop Demo: A demonstration of data discovery for the confluence of the San Juan and Animas Rivers near Farmington, New Mexico. This example focuses on surface water quality with a focus on total dissolved solids and conductivity.
TADA R8 Demo January 2026: An introduction to using the EPATADA R package to retrieve, clean, analyze, and visualize WQP data. This example workflow focuses on: A) retrieving, filtering and cleaning data from the WQP, B) creating an ATTAINS Assessment Unit/WQP Monitoring Location crosswalk, C) creating an ATTAINS Uses to Assessment Units crosswalk, and D) creating a TADA-compatible criteria and methodologies template for analysis.