Which number matters in your water report: the reported level, the legal limit, or the health goal? Each answers a different question. Start by keeping those columns separate, then read the notes that explain the result.
Your consumer confidence report, or CCR, is your community water system’s annual drinking water quality report. It describes the water source, regulated contaminants found, and information about violations and the system’s response. Use it to understand your supplier’s water, not as a test result from your kitchen faucet today.
The aim is practical: find the right report, understand one relevant entry, and ask a precise question if something remains unclear. Reading a CCR does not require a filter purchase.
Illustrative image, not a photograph of a utility report or water testing.
Table of Contents
Start With the Right Supplier
Check the supplier named on your water bill before searching by town. If water is included in your rent, ask the building manager which system supplies the property. When a report covers several service areas, ask the supplier which table applies to your address.
The EPA’s CCR information for consumers says you can call your local supplier for a copy or use EPA’s report search tool. A failed website search is a reason to contact the supplier, not to substitute a neighboring system’s report.
Save the complete document, including definitions and footnotes. Record its year and the dates beside the entries you want to understand. If you cannot tell when a result was collected, make that a question rather than assuming the cover date is the sample date.
For a private well, use a different starting point. The EPA’s private drinking water wells page provides well-owner information; a nearby utility’s CCR is not a result for your well. Our well-water testing checklist can help you prepare questions about testing instead.
Read the Explanation Before Comparing Numbers
EPA lists the drinking water source among the information in a CCR. Look for the lake, river, aquifer, or other source named in yours. Then read the report’s violation statements and any account of work to restore safe drinking water. These explanations belong beside the table, not after it as an optional extra.
For a notice you do not understand, write down three questions:
- What requirement does this notice concern?
- What period does it describe?
- What response is documented, and is there a newer update?
Do not supply a missing answer yourself. If a notice concerns sampling or reporting, ask what information is available for the period in question. Do not turn a missing result into either a zero or an assumed high concentration.
Keep current instructions separate from this review of an annual document. If your supplier has issued a current advisory, follow that advisory rather than using an older report to dismiss it. Asking whether a newer notice applies is a useful part of your follow-up.
Four Labels That Change How You Read a Row
The EPA’s National Primary Drinking Water Regulations provides the definitions below. Its first footnote defines MCL, MCLG, and TT; footnote seven explains the action-level framework for lead and copper.
MCL: maximum contaminant level. This is the highest level of a contaminant allowed in drinking water. MCLs are enforceable standards. EPA explains that they are set as close to health goals as feasible, considering available treatment technology and cost. The MCL is a requirement, not your supplier’s measured result.
MCLG: maximum contaminant level goal. This is the level below which there is no known or expected health risk, with a margin of safety. MCLGs are non-enforceable public health goals. A goal and an enforceable limit can therefore differ without the report contradicting itself. A result above a goal does not, by that fact alone, establish an MCL violation.
TT: treatment technique. EPA defines this as a required process intended to reduce a contaminant’s level in drinking water. Do not read “TT” as a missing concentration or as a number to compare with a result. Read the accompanying explanation of the treatment requirement.
Action level. For lead and copper, EPA describes a treatment technique requiring systems to control water corrosiveness, with additional steps required when the specified share of tap samples exceeds the action level. It is not simply another name for an MCL. Use the report’s explanation and ask the utility how its entry relates to that requirement; do not relabel a system result as your own faucet measurement.
These definitions cover common points of confusion, not every abbreviation a utility might use. For another label, consult the report’s own key or ask the supplier. A guessed definition can change the meaning of a row.
Work Through One Entry Without Losing Its Context
Choose a row you want to understand and copy its contaminant name exactly. Keep the reported result, units, and any symbols together. Do not copy a bare number into a note and leave its column heading behind.
Next, identify whether the requirement shown is an MCL, a treatment technique, or an action level. Keep any MCLG in a separate field. Check that numerical comparisons use matching units. EPA’s regulations page, for example, identifies milligrams per liter as equivalent to parts per million; that does not make every unit in a report interchangeable.
Now read the row’s footnote and violation entry. If the report gives both a range and a single reported level, ask what each represents before selecting one for comparison. If it does not explain how a value is used for compliance, that is a question for the supplier, not a reason to invent a calculation.
A short message can include the copied row and say:
I am reading the CCR for my service area. What does this reported level represent, and which note explains how it relates to the requirement? Please also confirm the sampling period and whether a newer notice applies.
This approach uses your actual report without an invented sample result. It also gives customer service a specific entry to explain rather than a general question about whether “the numbers are good.”
Illustrative image, not evidence of water quality.
Separate Utility Results From Questions About Your Tap
A system report and an individual household sample answer different questions. EPA’s regulations table identifies corrosion of household plumbing as a source of lead and copper. Do not treat the utility’s overall compliance statement as proof of the conditions at every faucet.
For a concern about your own tap, ask the supplier who can advise on appropriate testing. Describe the concern and what the CCR did not answer. If a laboratory will collect or analyze a sample, obtain its sampling instructions before collecting water. These are practical next steps, not a testing schedule or a medical recommendation.
If treatment later becomes relevant, our water filtration guide offers background on the options. Keep that decision separate from interpreting the report. A contaminant appearing in a table is not, on its own, a reason to buy equipment.
Keep a Short Record for Follow-Up
Copy these fields into a note:
- Supplier and service area.
- Report year and relevant sample dates.
- Contaminant row or notice, including the page number.
- Reported result, units, and symbols.
- Applicable requirement and any separate health goal.
- Violation statement and relevant footnote.
- Question still unanswered.
- Supplier’s response date and supporting document.
Leave a field blank if the report does not answer it. That blank shows what needs clarification. If a substance you expected to see is absent, ask whether it was monitored and how its results are reported; do not fill the gap with an assumption.
Your next step may be as small as getting the complete document or asking the utility to explain one footnote. If you later identify a treatment need, Find Your Filter is a selection aid, not a water-safety test. Finish with an understood report and a clear unresolved question, not an automatic shopping list.
