Common Water Problems on Long Island

Living on Long Island means access to beautiful coastlines, great communities, and fresh air—but when it comes to the water in your home, things aren’t always as clear. Many homeowners across Nassau and Suffolk counties face a variety of water quality issues that affect everything from taste and odor to plumbing and appliances.

Here’s a look at some of the most common water problems on Long Island:

1. Hard Water

Hard water is one of the most widespread problems in Long Island homes. It’s caused by high levels of minerals like calcium and magnesium.

What you might notice:

• White spots or film on glassware and dishes.

• Soap that won’t lather well.

• Scale buildup on faucets and showerheads.

• Dry skin or dull hair after bathing.

2. Iron and Manganese

Naturally present in Long Island’s groundwater, iron and manganese can cause staining and affect the taste of your water.

Signs to look for:

• Orange, brown, or black stains in toilets, sinks, and tubs.

• A metallic taste or smell.

• Dark particles in your water.

3. Chlorine and Chloramines

Public water suppliers use chlorine or chloramines to disinfect water. While it helps keep water safe, it can also create unwanted side effects in your home.

You may notice:

• A strong chemical taste or smell.

• Dry skin or hair.

• Faded laundry over time.

4. PFAS (Forever Chemicals)

Per- and polyfluoroalkyl substances (PFAS) have been detected in several Long Island water systems. These man-made chemicals are used in non-stick cookware, water-repellent fabrics, and firefighting foams, and can linger in the environment for years.

Concerns include:

• Health risks with long-term exposure.

• No noticeable taste or smell—only detectable through testing.

5. Nitrates

Nitrates can make their way into water through fertilizer runoff, septic systems, and agricultural waste—especially in rural or well water areas.

Why it matters:

• High nitrate levels can be especially dangerous for infants and pregnant women.

• No visible signs—testing is the only way to know.

6. Acidic Water (Low pH)

Some Long Island water has a low pH level, which can be corrosive to your plumbing system.

Common symptoms:

• Blue-green stains in sinks and tubs from copper pipes.

• Pinhole leaks or plumbing damage.

Think You Have Problem Water?

The best way to know what’s in your water is to have it tested. At Culligan of Long Island and NYC, we offer free in-home water tests to help you understand what’s coming out of your tap—and what you can do about it.

Let us help turn water you can live with into water you love. Contact us today to schedule your free water test.