Common Water Problems and Solutions for Your Home

Start with your water supplier’s Consumer Confidence Report, also called an annual water quality report. This report:

• Identifies the source of your water
• Lists regulated contaminants detected in the public system
• Shows measured levels
• Explains whether the supplier met drinking water standards.

Your supplier must make this report available each year, and you can also search for it through the EPA. However, you should know that this report describes the public water system, not necessarily the water at your individual faucet. Service lines and household plumbing can affect water after it leaves the utility.

If you notice an unusual taste, odor, color, or buildup, or have concerns about older plumbing, an at-home water test provides more property-specific information. Suspected lead, PFAS, bacteria, chromium-6, or other health-related contaminants require the appropriate certified laboratory analysis.

Common signs of hard water include:

• White scale around faucets
• Spots or film on glassware
• Stubborn soap scum
• Stiff-feeling laundry
• Soap or shampoo that does not lather well

Mineral deposits may also collect inside water heaters, coffee makers, dishwashers, and plumbing. These symptoms strongly suggest hardness, and testing will tell you exactly how hard your water is and what water treatment method will best address this hardness.

A rotten-egg odor often points to hydrogen sulfide gas or sulfur-related bacteria. If the smell appears from both hot and cold faucets, it may originate in the water supply or well. If it occurs only in hot water, the water heater, its anode rod, or bacteria inside the tank may be involved. A water test will reveal exactly what is causing your water to smell like rotten eggs.

The right solution depends on where the odor starts and how much hydrogen sulfide is present. A minor odor may respond to activated carbon, while stronger or persistent problems often require aeration or oxidation followed by filtration. A properly designed system will use chlorine, hydrogen peroxide, or another oxidant to convert dissolved hydrogen sulfide into particles that a filter can capture.

If the smell comes only from hot water, servicing the water heater may solve it without installing whole-house equipment. Well owners may also need to address sulfur bacteria inside the well or plumbing. LICWS can test the water and design whole-house filtration around the source and severity of your water’s sulfur smell.

Sulfur gas (hydrogen sulfide) can form as organic material breaks down without oxygen or through the activity of sulfur-reducing bacteria. It produces the familiar rotten-egg smell.

Methane may occur naturally in groundwater or enter a well because of certain nearby human activities. Unlike hydrogen sulfide, methane is colorless, tasteless, and odorless unless another gas is present with it.

These gases require different safety and treatment considerations. Hydrogen sulfide may be treated through oxidation, aeration, and filtration. Dissolved methane is generally removed by an aeration or degassing system that safely vents the gas outdoors. Because methane is combustible.

Cloudy water is often caused by tiny air bubbles released when pressurized water reaches the faucet. Fill a clear glass and let it sit. If the water clears from the bottom upward within a few minutes, trapped air is the likely cause and is generally harmless.

If particles settle to the bottom, the cloudiness remains, or the water has a noticeable color, taste, or odor, sediment or another water quality issue may be involved. Possible sources include:

• Mineral particles
• Disturbed deposits in public water mains
• Well problems
• Corrosion inside plumbing

Persistent or sudden cloudiness deserves testing rather than an assumption that it is only air.

Sand, silt, rust, and other particles can enter water through:

• Private well problems
• Disturbed water mains
• Nearby construction
• Plumbing corrosion
• Mineral deposits breaking loose inside pipes or a water heater

Treatment usually begins with a sediment filter selected for the particle size and household flow rate. Heavier loads may require a spin-down separator or automatic backwashing filter before finer filtration.

The source matters just as much as the filter: damaged well components, corroded plumbing, and contaminated runoff should be corrected instead of filtering out an endless amount of debris.

Water collects dissolved calcium and magnesium as it moves through soil and rock, making the water “hard”. These minerals can leave deposits inside fixtures, plumbing, water heaters, and appliances. Generally, hard water is considered a nuisance rather than a health concern. However, long-term mineral buildup can make cleaning harder and reduce equipment efficiency.

Conventional water softeners remove calcium and magnesium through ion exchange. Reverse osmosis can reduce calcium and magnesium at a drinking-water faucet, although it is not usually the first choice for treating hard water.

If your water tastes like metal, it may have elevated levels of iron, manganese, copper, zinc, or corrosive water with a low pH. If the taste is strongest after the faucet has gone unused for several hours and improves after running the faucet, household plumbing may be contributing to the metallic taste.

Have your water tested before selecting treatment. Iron from groundwater calls for a different solution than copper entering through corroding pipes.

Iron can enter water naturally from soil and rock or through corroding pipes and equipment. When the iron is still dissolved, the water may look clear as it leaves the faucet. After the water is exposed to air, the iron reacts with oxygen and forms rust-colored particles that can turn the water yellow, orange, or brown. If those particles are already visible when the water reaches the faucet, the iron has oxidized earlier in the water system.

Iron bacteria are a separate issue. These microorganisms use iron and can create slimy buildup, unpleasant odors, and recurring stains.

Treatment depends on the form and concentration of iron, along with pH, manganese, hardness, and bacterial activity. A softener may handle limited amounts of dissolved iron under suitable conditions. Higher levels commonly require oxidation followed by filtration, while iron bacteria may require well or plumbing disinfection. A water test and treatment plan prevent trial-and-error equipment purchases.

Nitrate and nitrite are nitrogen compounds that occur in water naturally. However, they can reach elevated levels through:

• Fertilizer runoff
• Septic systems
• Wastewater
• Animal waste
• Other land uses

Nitrate has no color, taste, or odor, so water testing is the only way to know whether it is present.

Elevated nitrate is especially dangerous for infants under six months because it can interfere with the blood’s ability to carry oxygen. The federal maximum contaminant level for nitrate in public drinking water is 10 milligrams per liter when measured as nitrogen.

Private well owners should routinely test their water for nitrate – particularly if there is an infant or pregnant woman in the house.

Reverse osmosis, nitrate-specific anion exchange, and distillation can remove or reduce nitrate when the equipment is correctly selected and maintained. Ordinary sediment filters and activated carbon filters do not remove nitrate. A conventional cation-exchange water softener should not be assumed to remove it either.

Do not boil water to treat nitrate. Boiling removes water as steam but leaves nitrate behind, which can increase its concentration. If a laboratory result exceeds the drinking water standard, use a safe alternate source for drinking and infant formula while you consult the local health department and a water treatment professional. After installation, test the treated water to verify performance. A properly selected reverse osmosis system is one common point-of-use nitrate removal option.

Water tests often look for total coliform bacteria as an indicator of the sanitary condition of a supply. Most coliforms are not themselves harmful, but their presence can signal a pathway through which disease-causing organisms could enter. E. coli is a more specific warning of possible fecal contamination.

If a water test detects bacteria in your water, follow guidance from the local health department and use a safe alternate water source until the problem is addressed. A well may need repairs and shock disinfection, followed by repeat laboratory testing.

Public water suppliers add chlorine to kill or control disease-causing microorganisms. A small residual can remain in the water to protect it as it travels through the distribution system. Some utilities use chloramine, a longer-lasting disinfectant formed by combining chlorine and ammonia, instead of free chlorine.

Water that meets public standards may still have a swimming-pool-like taste or odor that some households would rather reduce. Activated carbon is commonly used for free-chlorine reduction.

Chloramine is more persistent and requires a system specifically rated for chloramine reduction, with adequate media and contact time.

For one drinking-water faucet, a properly certified carbon filter or an RO system with carbon prefiltration can reduce chlorine taste and odor. You can also consider a whole-house water filtration system to remove chlorine from your water as it enters your home. LICWS can match the media, tank size, and flow rate to your water and household demand.

Chromium-6, or hexavalent chromium, is one form of the metal chromium. It can occur naturally in rocks and groundwater and can also enter the environment through industrial activity. It cannot be reliably identified by taste, smell, or appearance.

EPA currently regulates total chromium in public drinking water at 0.1 milligram per liter, or 100 parts per billion. That total includes chromium-3 and chromium-6 rather than setting a separate federal limit for chromium-6.

A laboratory test is needed to measure it. Reverse osmosis can reduce chromium in drinking water, but the system should carry an appropriate verified reduction claim and be maintained according to its specifications.

PFAS are a large family of long-lasting manufactured chemicals used in products designed to resist water, oil, stains, or heat. PFOS is one specific chemical within that family, as is PFOA. PFAS can enter groundwater and public water supplies, and they cannot be detected by taste, smell, or color.

Granular activated carbon, ion exchange resin, and reverse osmosis can reduce certain PFAS when properly designed and maintained. Not every filter removes every PFAS, so look for independent certification or a verified claim covering the compounds of concern.

Drinking water can contain naturally occurring minerals, substances introduced by human activity, or materials picked up from plumbing. Depending on the source and location, concerns may include lead, arsenic, copper, manganese, radium, volatile organic compounds, pesticides, disinfection byproducts, and microorganisms. Some primarily affect taste, color, or plumbing.  Others are a health risk.

No single test panel or water filter addresses every possibility. Municipal customers should review their annual water quality report and consider tap testing for concerns related to household plumbing. Private well owners should follow a regular water testing schedule based on local conditions and nearby land use. Once the problem is identified, LICWS can determine whether point-of-use treatment, whole-house water filtration, source correction, or another response is appropriate.