Brown Water in St. Helena: What’s Going On?
What this recurring problem reveals about aging water systems across Napa Valley

David Blue
Sep 7, 2026
St. Helena residents have been dealing with brown or yellow tap water for weeks, and the issue has raised a broader question: is this just a St. Helena problem?
The answer is more complicated than it looks. Similar discoloration can happen in Napa, Yountville, and American Canyon when hydrants are flushed, repairs are made, or minerals are stirred up in water mains. What makes St. Helena different is how often the problem has returned.
We took a closer look at what’s causing it, why some communities see only brief episodes, and what Napa Valley residents should do if the water coming from their tap suddenly turns brown.
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