Consumer Confidence Report for Drinking Water: What It Is and How to Read It
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The consumer confidence report drinking water utilities send you, usually called a CCR, is the annual water quality report that a public water system sends to the people it serves. The federal rule requires each community water system to provide one, and it sets out what the report must contain. If you want to know what is in the water that comes out of your tap, the CCR is the first document to find. This guide explains what the report covers, when it should arrive, where to get it when it is missing, and how to read the parts that matter most for a home with a shower, a water filter, or a water softener.
Quick answer
- A CCR is an annual report from a community water system. The U.S. EPA’s CCR page describes it as the way to “learn more about the quality of drinking water in your area.”
- Under the federal rule, each community water system must provide a report that includes the information set out in 40 CFR 141.153 and related sections. The text we opened is the Cornell Legal Information Institute copy of the e-CFR.
- Connecticut’s state instructions say each community water system must mail or directly deliver one copy to each customer by July 1 of each year. Your own state may set a different schedule for some systems.
What a consumer confidence report is
The Safe Drinking Water Act requires water utilities to tell customers about the water they deliver. The CCR is the usual way that happens. The Connecticut Department of Public Health describes the report as “an annual report that is provided by a community water system (CWS) to their consumers” and says it “characterizes the risks (if any) from exposure to contaminants detected in the drinking water in an accurate and understandable manner.” That wording matters. A CCR is not only a list of test results. It is supposed to explain what was found, whether it was above a legal limit, and what that means.
The report is written by the water system, not by a federal agency. That means the format and the level of detail can vary from one utility to another, even though all of them follow the same federal content rules. A small rural system and a large city system both publish a CCR, but the large system may have more monitoring results to show and more pages of tables.
What the federal rule says the report must include
The federal content rule begins with the water source. The text of 40 CFR 141.153, as shown on the Cornell LII site, states that “Each community water system must provide to its customers a report(s)” that contains the information listed in the section. The first required element is the source. The rule asks the system to identify “The type of the water” and the “commonly used name (if any) and location of the body (or bodies) of water.” So the first part of a CCR should tell you whether your water comes from a surface source such as a river or lake, or from ground water such as a well or aquifer.
The rule also covers source water assessments. If the state has completed an assessment of the water source, the report must tell consumers that the assessment exists, the year it was completed or last updated, and how to get it. Many systems list this in a short paragraph near the start of the report. If you cannot find it, that is a reasonable question to ask the utility.
The same rule also governs the parts of the report that deal with detected contaminants and violations. This guide focuses on the parts most readers use. The EPA’s CCR page advises consumers to read the report to learn about the quality of drinking water in their area. For a homeowner, the detected contaminants table is usually the most useful part.
When the report should arrive
The Connecticut instructions set the timing that applies to systems in that state. They state: “Each CWS must mail or directly deliver one copy of the CCR to each customer by July 1 of each year.” The same document notes that smaller systems may use other delivery methods under certain conditions. Connecticut also requires copies to go to the state department by the same deadline, so a system that has reported to the state should have a copy ready by then.
If you have not received a report by the summer, start with the utility’s website or customer service line. Many systems post the current CCR online, and the EPA’s CCR page links to tools that help consumers find a local report. If the utility cannot provide one, ask for the report by name and ask which year it covers.
How to read the report step by step
A workable reading order is shown below. It follows the sections a typical report uses, and it matches the content the federal rule asks for.
| Section of the report | What to look for | Why it matters for a shower or filter |
|---|---|---|
| Water source | Surface water or ground water, and the named water body | Source type affects which contaminants are tested for |
| Detected contaminants table | Level found, the legal limit, and the units | Shows what is actually present at the tap |
| Disinfectant information | Whether the system uses chlorine, chloramines, or another disinfectant | Helps you decide whether a chloramine question applies to you |
| Violations and notices | Any violation or result above a limit, with the dates and the system’s response | Tells you whether the report says action was needed |
| Contact and source assessment | Phone number, public meeting details, and where to see the assessment | Lets you ask the utility a follow-up question |
Start with the detected contaminants table. Find each substance, compare the level with the limit printed next to it, and note the unit. Units matter. A number that looks large can be well within a limit once the unit is understood, and a number that looks small can matter if the limit is small too. Do not compare figures across different units without converting them first.
Next, read any text about a violation or a result above a limit. The wording in the report is the best guide to what the system says happened. Look for the dates, what the system did about it, and whether it says the water was safe during that period. If the report does not say, ask the utility.
Words that appear often in a CCR
- Maximum contaminant level (MCL): the limit that the report compares a detected result against. The report should name the limit for each substance.
- Detected: a result the report lists as found in the sampled water.
Read the definitions section if the report includes one. Each utility uses these terms in its own report, so the report’s wording is the reference for that report.
How a CCR relates to a shower or home filter
A CCR describes the water as it leaves the treatment plant and moves through the distribution system. It does not measure the water after it passes through your home plumbing, your water heater, or your filter. A report describes the water the system delivers. It does not measure what the water picks up between the main and your showerhead, and the sources we opened do not say how much any particular fixture changes the water.
Some readers ask whether the report answers questions about chloramine or chlorine in a shower. It can tell you which disinfectant the system uses, but it does not explain how a shower exposes you to that disinfectant. The sources we opened for this guide do not address shower exposure in detail. If your report lists a contaminant that you want to follow up on, a home test from a certified lab can confirm what reaches your fixtures.
If you are considering a softener or a filter, the CCR is a useful starting point. For shower head options that are rated for lower flow, see our roundup of water-efficient hand-held shower heads, and for pressure and water-saving models see high-pressure water-saving shower heads. It shows the hardness, the disinfectant, and any other detected contaminants that a filter might need to address. Match the filter to the contaminant named in the report, and check the filter’s own certification for that contaminant. The CCR cannot tell you which product will remove it.
What to do if the report raises a question
- Call the utility and ask for the person who handles water quality reports. Write down the date, the report year, and the answer.
- Ask whether any contaminant in the report is above its legal limit, and whether the system has notified customers in writing.
- Ask whether a home test is recommended for any contaminant that may enter through plumbing.
- If the answer is unclear, contact your state drinking water program. Each state runs its own program under the federal rule.
How we chose
We chose the federal content rule, the EPA’s public CCR page, and one state instruction document that sets out the mailing schedule and the report structure. We wanted sources a reader can open without an account, and that describe the report itself rather than selling a test or a filter. The Cornell LII copy of 40 CFR 141.153 was opened on 2026-10-29 and is the text quoted here. The EPA page was opened on the same date and is cited for its description of the report and its links. The Connecticut instructions were downloaded as a PDF and read in full for the delivery deadline and the report format.
What we could not verify
- We did not open the CCR of any specific utility, so we cannot say what a particular local report contains.
- The EPA CCR page we opened is a short navigation page. The EPA’s own guidance on reading the report, and the current federal rule revisions linked from that page, were not opened in full.
- The Connecticut instructions apply to Connecticut systems. Mailing deadlines and delivery rules for systems in other states may differ, and we did not check other state rules.
- We did not verify how long a utility must keep past reports or how each state handles requests for older reports.
- The sources do not give a health risk for any particular contaminant in a specific home. A CCR describes the water at the plant or in the system; it does not measure your own plumbing.
FAQ
Who must send a consumer confidence report?
The federal rule applies to community water systems, which are the systems that serve year-round residents. The 40 CFR 141.153 text we opened begins with the requirement that each community water system “must provide to its customers a report(s).” Other kinds of water systems are covered by other rules, which this guide does not address.
When is the report due?
Connecticut’s instructions require mailing or direct delivery by July 1 of each year. Other states set their own deadlines in their drinking water programs, so check with your state if your utility has missed the date.
Is a CCR the same as a home water test?
No. A CCR reports results the utility collected from its system. A home test measures water at your own tap, which can include effects from your plumbing. Both can be useful, but they answer different questions.
What if my report shows a contaminant above its limit?
The report should say what the system is doing about it and whether any notice was given. Ask the utility for the timeline and the next monitoring result. If you have a specific health concern, a doctor is the right person to ask.
Can I find old reports?
Many utilities keep prior reports on their websites. If a report is not available online, ask the utility directly. The EPA’s CCR page points to tools for finding a local report.
Does a CCR tell me whether my shower water is safe?
It tells you what the utility measured in the water it delivers and whether the results met legal limits. It does not test your shower, your showerhead, or the water after your own pipes and fixtures.
Bottom line
Use the consumer confidence report as the starting point for any question about your tap water. Read the source section, the detected contaminants table with its units, and any violation notice. Then use the utility’s contact information to ask about anything the report leaves unclear.
Sources
- U.S. Government, Electronic Code of Federal Regulations, 40 CFR 141.153 “Content of the reports,” as shown on the Cornell Legal Information Institute site. Opened 2026-10-29. https://www.law.cornell.edu/cfr/text/40/141.153 (official, federal code)
- U.S. Environmental Protection Agency, “Safe Drinking Water Act: Consumer Confidence Reports (CCR).” Opened 2026-10-29. https://www.epa.gov/ccr (official, federal agency)
- Connecticut Department of Public Health, “Consumer Confidence Report Instructions” (PDF). Opened 2026-10-29. https://portal.ct.gov/-/media/departments-and-agencies/dph/dph/drinking_water/pdf/ccr_instructions.pdf (state government)
