This appendix provides additional resources for understanding a catchment’s water challenges.
The stoplight system was developed for this guide and may be used for an initial high-level assessment of the site’s water challenges, if local resources are available.
![AppendixA-1](https://ceowatermandate.org/site-targets-guide/wp-content/uploads/sites/30/2019/08/AppendixA-1.jpg)
![AppendixA-2a](https://ceowatermandate.org/site-targets-guide/wp-content/uploads/sites/30/2019/08/AppendixA-2a.jpg)
![AppendixA-3](https://ceowatermandate.org/site-targets-guide/wp-content/uploads/sites/30/2019/08/AppendixA-3.jpg)
Below is a stoplight approach for the Santa Ana River Watershed in California in the United States, showing the gap assessment in a visual format. Each color — red, orange, and green — were determined by a quantitative threshold.
![AppendixA-4](https://ceowatermandate.org/site-targets-guide/wp-content/uploads/sites/30/2019/08/AppendixA-4.jpg)