Tea-Colored Well Water in Atlantic County: Tannins, Testing and Treatment

If your well water in Atlantic County comes out of the tap looking like weak tea and stays that color in a glass overnight, the likely cause is tannins: natural organic material that water picks up as it moves through the peaty, plant-rich soils of the Pine Barrens. Tannins are a nuisance, not a health hazard, but they stain laundry and fixtures, give water an earthy taste, and can coat and ruin other treatment equipment. The usual fix is a tannin-specific anion exchange system, often paired with a softener and an acid neutralizer, since Pinelands wells tend to be acidic as well. A Clear Alternative offers free in-home water analysis across Atlantic County; call 1-888-577-8088.

Why Atlantic County Wells Get Tannins

Much of Atlantic County lies in the Pinelands, where rivers and streams such as the Mullica, the Great Egg Harbor and their tributaries run a deep amber color. The Pinelands Preservation Alliance explains that the tea color of Pine Barrens streams comes from iron and from natural vegetative dyes such as tannin. Cedar swamps, bogs and decaying leaves release these compounds into shallow groundwater.

According to the Water Systems Council’s wellcare information sheet on tannins, tannins (also called humic or fulvic acids) are more common in shallow wells than deep ones, and water in marshy, low-lying or coastal areas is more likely to have them. That describes a lot of private wells in Hammonton, Mullica Township, Egg Harbor City, Galloway, Hamilton Township, Buena Vista and Estell Manor.

Tannin levels can change with the seasons. Heavy fall rain and leaf drop can push more organic material into shallow groundwater, so some homeowners notice the color getting worse in late fall and early spring.

Signs You Have Tannins

• Water is pale yellow to tea-brown right out of the faucet, even after running it.
• Yellow staining on white laundry, porcelain, tubs and toilet tanks.
• A tangy or earthy taste, or a musty smell.
• Your softener or iron filter seems to stop working, or the water smells fishy after it was installed.

The Water Systems Council lists all of these, and notes that tannins are considered an aesthetic problem with no known health hazard. That said, color can hide other problems, so tea-colored water should still be tested, especially for bacteria if the color showed up suddenly after flooding.

Tannins or Iron? The Overnight Glass Test

Iron and tannins often look alike, and Pinelands wells frequently have both. Before you buy anything, try this simple check from the Water Systems Council:

1. Run the cold tap for a minute or two, then fill a clear glass.
2. Set it on a white sheet of paper and leave it overnight, out of direct sunlight.
3. In the morning, look closely. If the color has settled to the bottom and the water above is clearer, the cause is most likely iron or manganese. If the color is still evenly spread through the glass, tannins are the likely cause.

Some glasses show both: a layer on the bottom and a tint that stays. That usually means iron and tannins together, which is common in Atlantic County.

Then Get a Lab Test

The glass test points you in the right direction, but treatment should be designed from real numbers. Test for tannins, iron, manganese, pH, hardness, alkalinity, sulfate and total dissolved solids. The Water Systems Council points out that iron creates a false positive on a tannin test and has to be subtracted from the tannin result, which is another reason to test both at the same time.

How Tannins Are Removed

Tannin Anion Exchange Systems

The most common whole-house fix is an anion exchange system that uses a resin made specifically to capture tannins. It looks and works much like a water softener, and it cleans itself with ordinary softener salt, but the resin works on the opposite kind of charge. A regular softener will not remove tannins. In fact, the Water Systems Council notes that tannins can coat the media in iron filters, softeners and neutralizing filters so that they stop working properly.

The resin is sensitive to hardness, so many tannin systems include a softener ahead of the tannin stage, either as a separate tank or as a mixed bed in one tank. Softening first extends the resin’s life and helps it take up more tannin.

Why pH Matters in the Pinelands

Pinelands groundwater is naturally acidic, often with a low pH that also causes blue-green stains and pinhole leaks in copper plumbing. pH also affects which tannin treatment works best. NDSU Extension recommends anion exchange for tannins when the pH is above 6.0, and an activated carbon filter when the pH is below 5.0. In practice, many Atlantic County homes correct the pH first with an acid neutralizer, then remove tannins. Our guide comparing an acid neutralizer and a water softener explains how those two pieces fit together.

Other Options

• Activated carbon: can handle low tannin levels or very acidic water, but the carbon needs regular replacement.
• Oxidation and filtration: another method the Water Systems Council lists, though it is more complicated than anion exchange and softening.
• Reverse osmosis at the kitchen sink: removes tannins from drinking and cooking water, but treats only that tap and does nothing for laundry stains.

When Iron Is Also Present

Iron and tannins can bind together, which makes both harder to remove. The order of equipment matters, and the right order depends on your numbers. A water treatment specialist should design the setup after seeing the lab results. Our guide to iron and manganese in well water covers the iron side.

Questions to Ask Before Buying a Tannin System

• Was the system sized from a lab test? A system chosen from the color alone may be too small, or may be the wrong type entirely if the real problem is iron.
• What happens to my pH? If your water is acidic, ask how the system handles it and whether you also need a neutralizer.
• Does it include softening? Ask whether hardness and iron are handled ahead of the tannin resin.
• Where does the backwash go? Like a softener, a tannin system sends regeneration water to a drain. Make sure your home has a proper place for it.
• Who services it? Ask who cleans the resin, adjusts settings and retests the water.

A good answer to each of these is a sign the system was designed for your water, not just pulled off a shelf.

Keeping a Tannin System Working

• Keep salt in the brine tank. A tannin system that runs out of salt stops removing color.
• Watch for a fishy smell. The Water Systems Council says a fishy odor is a sign the anion resin is fouled and needs cleaning.
• Clean the resin occasionally. The Water Systems Council recommends occasional regeneration with a baking soda and salt solution to keep the resin effective.
• Retest yearly. Tannin levels shift with rainfall and season. A yearly test confirms the system is still sized correctly.

Serving Atlantic County Homes

We test and treat well water across Atlantic County, including Hammonton, Mullica Township, Egg Harbor City, Galloway, Hamilton Township, Buena Vista, Folsom and Estell Manor. See our Atlantic County service area page and the full range of equipment on our water treatment page. If you are also concerned about natural radioactivity, which is found in some Coastal Plain wells, read our guide to radium and gross alpha testing.

When to Call A Clear Alternative

Call us if your water is tea-colored, if white laundry keeps coming out yellow, if a softener or iron filter stopped working soon after it was installed, or if the glass test left you unsure whether you have iron, tannins or both. A Clear Alternative is a family-run company that has been treating New Jersey water since 1991, working from 9230 Collins Ave in Pennsauken. We will test your water in your home at no charge, explain what the results mean, and recommend equipment that fits your actual water. Call 1-888-577-8088 to book your free in-home water analysis.

Frequently Asked Questions

Are tannins in well water harmful?

No. The Water Systems Council considers tannins an aesthetic problem with no known health hazard. They do stain laundry and fixtures and can interfere with other treatment equipment, and the water should still be tested for bacteria and other contaminants.

How can I tell tannins from iron?

Fill a clear glass and let it sit overnight. If the color settles to the bottom, it is most likely iron or manganese. If the color stays evenly spread, it is most likely tannins. Confirm with a lab test.

Will a water softener remove tannins?

No. A regular softener does not remove tannins, and tannins can coat its resin. Tannins need a tannin-specific anion exchange resin, which is often paired with a softener.

Why is Atlantic County well water often tea-colored?

Much of Atlantic County is in the Pinelands, where shallow groundwater picks up natural organic material from cedar swamps, bogs and decaying vegetation.

Does acidic water affect tannin treatment?

Yes. NDSU Extension recommends anion exchange when pH is above 6.0 and activated carbon when pH is below 5.0, so many Pinelands homes correct pH first.

Why does my tannin system smell fishy?

According to the Water Systems Council, a fishy odor usually means the anion resin is fouled and needs cleaning.