Nexxus Water Watchdog · Oasis Water Technologies
What happenedin your area
Every violation recorded against the public water systems serving a US county — what it was, whether the utility fixed it, and whether they told anyone. Built from the EPA's own compliance record. Enter a ZIP code, or pick any county.
Drag to move · scroll or pinch to zoom · tap a county for its record
Select a county
Click anywhere on the map, or search a ZIP code, to see the water systems serving that area and what has been recorded against them.
What this is. Violations recorded against public water systems whose
service area includes each county, from 2021 onward. Source: US EPA Safe Drinking Water Information
System, published through ECHO — reporting quarter 2026Q2, data released 9 July 2026. Utilities report
to their state, states report to EPA, and there is a reporting lag of roughly four to five months.
Why "per system" is the default. A big county has more water systems,
so it racks up more violations simply by being big — Harris County, Texas has the second-highest raw count
in the country and one of the lowest rates per system. Colouring by the raw total would mostly
be colouring by county size. "Per system" divides by the number of systems serving the county; counties
served by fewer than five systems are left neutral, because a rate built on two or three systems is noise,
not a signal. The totals are always one click away.
What this is not. This is a record of regulatory events at water
systems serving an area. It is not a measurement of the water in any individual home, and a county
with no recorded violations is not a statement that its water is clean — only that nothing was
recorded. Violations are counted where they happened; a system serving a county may not be the system
serving you.