Common Water Problems in Napa Valley

Napa Valley is known for its rolling vineyards, award-winning wines, and scenic beauty. But when it comes to the water flowing through local homes and businesses, it’s not always as pristine as the surroundings. Whether you’re in Napa, Yountville, or American Canyon, water quality can vary—and many residents experience issues they may not even be aware of.

Here’s a look at some of the most common water problems in Napa Valley:

 

1. Chlorine Taste and Odor

Most public water in Napa is treated with chlorine to keep it safe from bacteria and other contaminants. While effective, chlorine can leave behind an unpleasant taste and smell.

What you might notice:

• A strong chemical odor from the tap

• Water that tastes like a swimming pool

• Dry skin or hair after showering

 

2. Sediment and Cloudy Water

Napa’s water is often drawn from surface sources, which can carry sediment like sand, rust, and dirt—especially after heavy rains or pipe repairs.

Signs to watch for:

• Cloudy or murky tap water

• Grit or particles in the sink

• Wear and tear on plumbing and appliances

 

3. Musty or Earthy Smells

This is often due to algae blooms or organic matter in surface water sources like Lake Hennessey or the Napa River, especially during warmer months.

What you might notice:

• Water that smells like damp soil or lake water

• Discoloration or odor, particularly in the summer

 

4. Discoloration or Staining

Minerals like iron or manganese can naturally occur in well water or get into city water through aging pipes. They can cause stains that are tough to clean.

Common signs:

• Orange or reddish stains in tubs, toilets, and sinks

• Black spots or streaks in laundry

• Metallic taste in drinking water

 

5. PFAS and Other Emerging Contaminants

PFAS—also known as “forever chemicals”—have been detected in parts of California and are a growing concern. These man-made chemicals don’t break down easily and may carry long-term health risks.

What’s concerning:

• PFAS often can’t be seen, smelled, or tasted

• Can enter water supplies through industrial or landfill runoff

 

Know What’s in Your Water

Whether your water comes from the City of Napa’s supply or a private well, the best way to know what you’re dealing with is a free in-home water test from Culligan.

We’ll test your water, explain the results in simple terms, and recommend solutions tailored to your home’s unique water challenges. From tasting better to protecting your home, we’re here to help—because everyone deserves water they can trust.