What Your City's Annual Water Quality Report Is Really Saying

Most people have never looked at their city's annual water quality report, and if they have, they've probably stopped reading after the first table of numbers and chemical names.

Every public water utility in the United States publishes one of these reports, but they're often filled with technical language that's difficult to interpret.

You can check your water quality report here.

Follow along as we explain how to read your city's annual water quality report, what those contaminant levels actually mean for your home, why "meeting EPA standards" doesn't necessarily mean your water is ideal for bathing, and when a shower filter can make a noticeable difference.

The U.S. Environmental Protection Agency (EPA) requires public water systems to publish a water quality report (also called a Consumer Confidence Report) every year. It summarizes testing performed throughout the treatment and distribution process during the previous year.

Utilities test for dozens of substances, including:

• Bacteria

• Disinfectants like chlorine

• Metals such as lead and copper

• Nitrates

• Pesticides

• Other regulated contaminants

The report often shows the highest detected level, the average level, or a range of results depending on the contaminant.

It's important to remember that the report is a summary of thousands of individual tests, not just a single water sample.

Consumer Confidence Reports are required by federal law for every public drinking water system in the United States.

The purpose is to give residents transparency into:

• Where their drinking water comes from

• What contaminants were tested for

• Whether any contaminants were detected

• Whether the water met EPA safety standards

• Any violations or treatment issues that occurred during the reporting year

These reports are intended to help consumers understand the quality of their public water supply and build trust in the municipal water system.

Public water systems conduct testing on an ongoing schedule throughout the year.

The frequency depends on the contaminant being monitored:

• Disinfectants like chlorine may be tested daily or continuously.

• Bacteria are often tested multiple times each month.

• Lead and copper are generally tested every six months to three years, depending on the system's previous results and regulatory requirements.

• Nitrates, pesticides, volatile organic compounds (VOCs), and other contaminants may be tested quarterly, annually, or every few years, depending on EPA regulations and local water conditions.

An annual water quality report compiles these results into a single document, giving residents an overview of the previous year's testing.

Water quality reports are designed for compliance, not everyday consumers. Even though they’re available to the public and people should be reading them, they're not easy to understand.

Reports often contain:

• Scientific abbreviations

• Action Levels

• Treatment Techniques

• Detection limits

• Regulatory terminology

Don’t get hung up on the terminology. Let’s walk through the things you should focus on in your water quality report.

One of the first things to look for in your water quality report is which disinfectants your city uses to keep drinking water safe.

Most municipalities rely on chlorine, chloramine, or a combination of both to kill harmful bacteria, viruses, and other microorganisms as water travels from the treatment plant to your home.

While these disinfectants play an essential role in public health, they're also responsible for many of the complaints homeowners have about their tap water.

Chlorine can:

• Leave behind a noticeable "pool" smell.

• Contribute to dry skin.

• Strip natural oils from your hair.

Your water quality report will typically list the average and highest levels detected throughout the year. 

Keep in mind that even when these levels are well within EPA guidelines, you may still notice cosmetic effects, especially if you have sensitive skin or color-treated hair.

Your city's report will also include testing results for various metals. Some metals occur naturally in water sources, while others enter the water as it passes through aging pipes or plumbing fixtures.

Lead and copper are often associated with individual household plumbing rather than the water leaving the treatment plant. Iron and manganese can contribute to metallic tastes, orange staining, or dark-colored water at higher concentrations.

If your report shows detectable levels of these metals, don't panic. The report should also indicate whether those levels exceed EPA action limits.

Even when a municipal system is in compliance, individual homes, especially older ones, can experience different water quality due to their own plumbing.

Water hardness often isn't listed as a regulated contaminant because it isn't considered a health risk, but it can have a major impact on daily life.

Hard water is caused by naturally occurring minerals that dissolve into groundwater and surface water as it moves through rock and soil.

These minerals aren't harmful to your health, which is why the EPA doesn't regulate water hardness the way it regulates contaminants like lead or bacteria.

However, they can have a noticeable impact on everyday life. If you live in an area with hard water, you may experience:

• White mineral buildup on showerheads and faucets

• Soap scum on shower walls and glass doors

• Spotty dishes and fixtures

• Shampoo that doesn't lather as easily

• Hair that feels dull or difficult to rinse

• Skin that feels dry or tight after showering

If your water quality report doesn't mention hardness but you're experiencing these common signs, you may need to check your local utility's separate water hardness data or run a home water hardness test.

In short, it means your public water system complied with federal drinking water regulations during the reporting period. The EPA sets legal limits for dozens of contaminants based on the best available science, and public water utilities are required to monitor those contaminants and keep them below those limits.

The EPA's regulations are intended to reduce health risks from contaminants in drinking water. They are not designed to ensure that water is free from every substance you can taste, smell, or feel.

For example, your city's water can meet every federal requirement while still containing:

• Low levels of chlorine or chloramine is used for disinfection.

• Naturally occurring minerals that cause hard water.

• Small amounts of metals that remain below regulatory limits.

"Safe" doesn't always mean "ideal" for your daily shower or household experience. While municipal water that meets EPA standards is considered safe to drink, many homeowners choose a shower filter to reduce chlorine and other substances that can affect the shower experience. 

EPA standards are based primarily on health outcomes, not cosmetic concerns.

Even though a water quality report shows compliant levels of contaminants, many homeowners still experience affects on their skin and hair.

Think of your annual water quality report as a public health document rather than a personal water assessment. It tells you whether your city's water meets federal safety requirements, but it doesn't answer questions like:

• Why does my shower smell like chlorine?

• Why does my skin feel tight after bathing?

• Why is there white buildup on my showerhead?

• Why won't my shampoo lather?

• Why does my hair feel dry or dull?

Those questions often relate to naturally occurring minerals, disinfectants, or your home's plumbing, not whether your city's water is considered safe to drink.

Even if your city's annual water quality report shows excellent results, the water coming out of your faucet may not be exactly the same as the water tested by your local utility.

A variety of factors can influence its quality, appearance, and even how it feels on your skin and hair:

• Distance from treatment plant

• Neighborhood pipes

• Building plumbing

• Home plumbing

• Water sitting overnight

• Seasonal changes

• Pipe repairs

• Aging infrastructure

Do you still have your city’s water quality report pulled up? You might see some of these terms:

• Maximum Contaminant Level (MCL): The highest amount of a specific contaminant that is legally allowed in public drinking water under EPA regulations.

• Maximum Contaminant Level Goal (MCLG): A non-enforceable public health goal that represents the level of a contaminant at which no known or expected health risks exist.

• Action Level: A concentration of certain contaminants that requires a water utility to take additional steps to reduce exposure if exceeded.

• Treatment Technique (TT): A required treatment process that water systems must follow when it's not practical or possible to measure a contaminant directly.

• Parts Per Million (ppm): A unit of measurement that represents one part of a substance for every one million parts of water.

• Parts Per Billion (ppb): A unit of measurement that represents one part of a substance for every one billion parts of water, allowing for the detection of extremely small amounts of contaminants.

• Turbidity: A measure of how clear or cloudy water is, with higher turbidity indicating more suspended particles that can interfere with disinfection.

• Hardness: A measure of dissolved minerals that can cause scale buildup and affect how water feels.

• Chloramines: A disinfectant made by combining chlorine and ammonia that helps keep drinking water safe by providing longer-lasting protection throughout the distribution system.

• Disinfection Byproducts (DBPs): Compounds that form when disinfectants react with naturally occurring organic matter in the water.

• Volatile Organic Compounds (VOCs): A group of carbon-based chemicals that can enter drinking water through environmental sources.

• PFAS: A group of long-lasting synthetic chemicals, often called "forever chemicals," that may be monitored in some water systems due to growing concerns about their persistence in the environment and potential health impacts.

Every city's water is different because of its source water, treatment process, infrastructure, and geology. While all public water systems must meet federal regulations, residents often experience different cosmetic issues depending on where they live.

New York City is known for having some of the softest municipal water in the country because it's supplied primarily by protected upstate reservoirs in the Catskill and Delaware watersheds.

While residents generally don't deal with significant hard water issues, the city's water is still disinfected with chlorine, which some people may notice in the smell or taste.

In older apartment buildings, the condition of internal plumbing can have a greater impact on tap water than the city's treatment process itself.

Philadelphia's drinking water comes from the Delaware and Schuylkill Rivers and undergoes extensive treatment before reaching residents. Although the municipal supply meets federal standards, older homes with aging plumbing may experience different water quality at the tap.

Miami's water comes primarily from the Biscayne Aquifer, a groundwater source that naturally contains dissolved minerals. As a result, many homeowners experience moderately hard water, which can contribute to scale buildup and dry-feeling skin or hair.

Dallas is well known for having hard water because of the mineral-rich lakes and reservoirs that supply the city's drinking water. Residents commonly deal with limescale buildup, spotty dishes, and soap that doesn't lather as easily because of elevated calcium and magnesium levels.

Los Angeles receives water from a combination of imported sources and local groundwater, which results in moderately to very hard water across the region. Many homeowners notice mineral deposits on shower doors, faucets, and showerheads due to the high calcium and magnesium content.

San Francisco receives most of its drinking water from the Hetch Hetchy Reservoir in the Sierra Nevada, giving the city relatively soft water compared to many other parts of California. Hard water is less of a concern within San Francisco, but chlorine is still used during the treatment process to maintain water quality.

It's also worth noting that neighboring Bay Area communities may receive water from different sources, resulting in noticeably different hardness levels and water quality.

Portland receives most of its drinking water from the protected Bull Run Watershed, giving it some of the softest water among major U.S. cities. The low mineral content means residents typically experience very little limescale or hard water buildup on fixtures.

However, Portland still disinfects its water, so some residents may notice chlorine depending on where they live and the time of year.

Yes. If your water is provided by a public or community water system, it is required to publish an annual water quality report by July 1 each year.

You can find yours by typing in your zip code here.

You may feel like you need to test your water at home to truly understand what’s in it.

Home testing is helpful in these situations:

• Private wells

• Very old homes

• Lead plumbing

• Major renovations

• Strange odors

• Water discoloration

• Recent plumbing work

• Natural disasters, such as flooding

Municipal reports provide a broad picture, while home testing reveals conditions at your tap.

Yes. After water is treated to meet federal and state drinking water standards, it travels through miles of underground distribution pipes before reaching neighborhoods.

Along the way, several factors can affect the water's quality, including:

• The age and condition of municipal water mains.

• Construction or maintenance on local water lines.

• Water sits in pipes overnight or while you're away.

• The plumbing materials inside your home (such as older copper or lead service lines).

• Corrosion in household plumbing.

• Distance from the treatment facility.

For example, a city may report low lead levels throughout its system, but an individual home with older plumbing could still have elevated lead levels at the tap.

This is why two homes even on the same street can have noticeably different experiences with their tap water.

Shower filters are designed to improve the quality of water where it matters most for bathing, supporting healthier-feeling skin, softer hair, and a more enjoyable shower experience.

A quality shower filter may help reduce:

• Chlorine

• Chloramine

• Sediment

• Rust particles

• Certain heavy metals

• Unpleasant odors

It will not typically:

• Significantly soften hard water.

• Remove dissolved calcium and magnesium.

• Make water equivalent to a whole-house filtration system.

An annual water quality report tells you how your municipality treats and monitors water, not necessarily how that water behaves once it reaches your shower.

Understanding your local report helps you identify what may be affecting your skin, hair, fixtures, and overall shower experience. Pairing that information with what you notice at home helps you make informed decisions about solutions such as shower filters or additional water testing.

Shop the Weddell Duo shower filter, NSF-certified for chlorine reduction and independently verified by an accredited U.S. third-party laboratory to reduce PFAS and particulates.