Safer Water Starts at Home

Aqua Science • Water Wisdom

By Michael Izzo · November 2, 2026

You check food labels. You buckle their seat belts. You make sure they wear a helmet. But how much do you know about the water your children drink every day?

For a parent, the unsettling question is simple: Could something in that clear glass of water harm my child without me knowing?

Clear water is not proof that water is free of contaminants. Understanding your water—and choosing treatment based on what is actually present—can help you take a practical step toward protecting your family.

Why parents worry about more than taste

Some water problems announce themselves with an unpleasant odor or visible staining. Others do not. Lead, for example, cannot be seen, tasted, or smelled in drinking water.

Public tap water in the United States is regulated and usually safe to drink. Still, contamination can occur, and household plumbing can introduce lead after water leaves the treatment plant. Private well owners are responsible for arranging their own testing.

Lead: a concern for growing children

Lead exposure can harm a child’s developing brain and nervous system, affecting learning and behavior. CDC reports that no safe blood lead level has been identified for young children.

Lead may enter drinking water through service lines, solder, faucets, and other plumbing materials. Formula-fed infants can be especially vulnerable when formula is prepared with lead-contaminated water.

A filter specifically certified for lead reduction can help reduce exposure. Boiling does not remove lead.

PFAS: understanding the long-term concern

PFAS are a large group of chemicals often called “forever chemicals.” PFOS and PFOA are two members of that group.

Studies have associated exposure to certain PFAS with higher cholesterol, changes in liver enzymes, and a lower antibody response to some vaccines in children. PFOA exposure has also been associated with kidney and testicular cancers.

These findings deserve attention, but they do not mean that a child who drinks tap water will develop cancer. Risk depends on the particular chemical, exposure level, and duration, among other factors. Reducing a confirmed source of exposure is a sensible goal.

Microbes and Nitrates: Important Well-Water Concerns

Contaminated water can also cause immediate illness. Organisms such as Giardia, Cryptosporidium, and disease-causing E. coli can cause gastrointestinal illness and dehydration.

High nitrate levels are especially dangerous for young infants and can cause methemoglobinemia, commonly called “blue baby syndrome,” which interferes with the blood’s ability to carry oxygen.

An ordinary taste-and-odor filter is not a substitute for treatment designed for these problems.

Start with answers, then choose treatment

For municipal water, review your utility’s annual water-quality report and ask about local concerns. Testing at your own faucet may also be appropriate, particularly for lead.

For private wells, CDC recommends testing at least annually for total coliform bacteria, nitrates, total dissolved solids, and pH. Ask your health department or a certified laboratory which additional tests make sense for your location, including PFAS or arsenic where warranted.

A basic screening does not establish that water is safe to drink. PFAS, lead, and disease-related bacteria require appropriate testing.

Convenient drinking water, right at your sink

A properly selected under-sink system can provide treated water for drinking, cooking, and filling reusable bottles. That convenience can make it easier to rely less on disposable bottled water.

The key is choosing a system with verified performance for your particular concern. A filter certified for chlorine taste reduction is not automatically certified for lead, PFAS, or microorganisms. Replace cartridges on schedule and follow maintenance instructions.