According to the EPA, water violations are sorted into three high level categories:

Note that violations are assigned to the public water systems (PWSs) within each state, of which there are often thousands. For example, Texas has 7,293 PWSs.

A PWS is defined as a system for the provision to the public of water for human consumption through pipes or other constructed conveyances.

charts_and_maps

https://www.visualcapitalist.com/wp-content/uploads/2024/12/Water-Violations-by-State_Site.jpg

> According to the EPA, water violations are sorted into three high level categories:
> 
> - Health-based: Includes violations regarding maximum contaminant or disinfectant levels in water
> - Monitoring and reporting: Includes failures to conduct regular monitoring or reporting of drinking water quality
> - Other violations: Includes failure to to issue consumer confidence reports, or conducting periodic sanitary surveys
>
> Note that violations are assigned to the public water systems (PWSs) within each state, of which there are often thousands. For example, Texas has 7,293 PWSs.
> 
> A PWS is defined as a system for the provision to the public of water for human consumption through pipes or other constructed conveyances.

https://www.visualcapitalist.com/mapped-water-violations-by-state/