When does my water report come out?

Community water systems must deliver the Consumer Confidence Report to customers by July 1 each year, covering the prior year's data. Under newer rules taking effect for 2027, systems serving more than 10,000 people will issue it twice a year, but July 1 remains the annual deadline for everyone.

What is the difference between MCL and MCLG?

MCL, the Maximum Contaminant Level, is the enforceable legal limit. MCLG, the Maximum Contaminant Level Goal, is the level with no known or expected health risk and is often lower, sometimes zero. The MCL is set as close to the goal as treatment allows, so meeting the MCL is legal but is not the same as reaching the health goal.

Is an action level the same as a safe level?

No. An action level is the concentration that triggers required treatment or other steps, not a safety threshold. The lead action level is 0.015 mg/L, or 15 parts per billion, but there is no level of lead considered safe. Treat it as a trigger for action, not a green light.

I have a private well. How do I get a water report?

You do not receive one. Private wells are not covered by CCR rules and are not regulated by EPA, so testing is your responsibility. Test annually for coliform bacteria and nitrate, add tests for local concerns like arsenic, lead, or PFAS, and use a state-certified lab. Your state or county health department can point you to one.

My report shows PFAS as non-detect. Does that mean there is none?

Not necessarily. The federal PFAS rule sets limits, with PFOA and PFOS at 4 parts per trillion, but monitoring and compliance phase in over several years. Older reports may show no PFAS data even where PFAS is present simply because monitoring was not yet required. A home test through a certified lab can fill the gap.

Water guide

How to Read Your Water Quality Report (CCR), Step by Step

Your water utility mails you a Consumer Confidence Report every year, and most people throw it out. Here is how to find it, decode the jargon, spot a number near a limit, and turn a finding into the right filter certification.

What the report is and who has to send one

If your water comes from a public utility, you receive an annual drinking water quality report called a Consumer Confidence Report, or CCR. Federal rules require every community water system to prepare one and deliver it to customers each year by July 1. A community water system is broadly any system that serves at least 25 year-round residents or has at least 15 service connections, which covers most cities, towns, homeowners associations, and mobile home parks.

The report covers the previous year's data. It lists where your water comes from, which regulated contaminants were detected and at what levels, how those levels compare to legal limits, and any violations or required public notices. It is not marketing; the content and format are set by EPA rules.

If you rent or never see a mailer, the report is almost always posted on your utility's website, and EPA maintains a lookup to find your provider. If you are on a private well, no one sends you a CCR, and the rules below about testing apply to you instead.

Finding your report

Start with the name of your water utility, usually printed on your water bill. Search that name plus 'Consumer Confidence Report' or 'water quality report' and the current year. Most utilities post a PDF.

If you cannot find the utility name, EPA's CCR information page links to tools for locating your system. Larger systems serving more than 10,000 people will, under newer rules taking effect for reports due in 2027, deliver a report twice a year, but the July 1 annual report remains the baseline for everyone.

Once you have the PDF, do not try to read it front to back. Skip to the table of detected contaminants. That table is where the useful information lives, and the rest is mostly definitions and boilerplate.

The four terms that unlock the table

MCL, Maximum Contaminant Level, is the highest level of a contaminant legally allowed in drinking water. It is enforceable. If a system exceeds an MCL, that is a violation and triggers public notice.

MCLG, Maximum Contaminant Level Goal, is the level at which there is no known or expected health risk. It is a goal, not a law, and it is often set lower than the MCL, sometimes at zero. The gap between MCLG and MCL exists because the MCL is set as close to the goal as is feasible with available treatment. A result that sits at the MCL is legal but is not the same as being at the health goal.

Action level applies to a few contaminants, most notably lead and copper, that are addressed by treatment rather than a fixed MCL. The lead action level is 0.015 mg/L, also written as 15 parts per billion. If more than 10 percent of sampled taps exceed it, the system must take corrective steps. An action level is a trigger for action, not a safety threshold, and there is no level of lead considered safe.

Detection, or a detected level, is simply what the lab measured, usually reported as a range and an average across the year. The detected number is the one you compare against the MCL or action level.

Spotting a number that should get your attention

Read across each row: detected level, then MCL (or action level), then MCLG. A detected level above the MCL or action level is the clearest red flag, and the report is required to explain any exceedance and what is being done about it.

Just as important are the near-misses. A detected level that sits close to the MCL is legal but worth noting, because annual averages hide spikes and your home's plumbing can add contaminants after the water leaves the treatment plant. Lead is the classic example: the utility can meet its action level system-wide while your specific tap, fed by an old lead service line or brass fixtures, runs higher.

Also scan for contaminants where the MCLG is zero or far below the MCL, such as certain disinfection byproducts or, increasingly, PFAS. A detected level that is well under the legal MCL but well above the health goal is a reasonable thing to want to reduce, even though the utility is fully compliant. The report tells you what is legal; it does not always tell you what you would prefer to drink.

What the CCR does not cover

The CCR reports data from the utility's system, typically measured before the water reaches your home. It does not measure your tap. Lead and copper in particular are often picked up from household plumbing and service lines after the water leaves the main, so a clean system-wide report is not a guarantee for your specific faucet.

Newer or unregulated contaminants may not appear at all if there is no monitoring requirement yet. The federal PFAS drinking water rule sets limits for several PFAS, with PFOA and PFOS limited to 4 parts per trillion, but monitoring and compliance phase in over several years, so older reports may show no PFAS data even where it is present.

If you want to know what is actually coming out of your tap, the CCR is a starting point, not the final word. That is where home testing comes in.

If you are on a private well

Private wells are not covered by the CCR rules and are not regulated by EPA. No one tests your water for you and no one mails you a report. Testing and treatment are entirely your responsibility, which means a well owner has to be more active than a city customer, not less.

A reasonable baseline is to test annually for total coliform bacteria and nitrate, and to test for anything specific to your area: arsenic, lead, fluoride, manganese, pesticides, or PFAS depending on local geology and land use. Use a state-certified laboratory; your state or county health department usually keeps a list and may offer subsidized test kits. Test more often if you notice a change in taste, color, or smell, after flooding, or if a nearby source of contamination appears.

When you get well results back, read them the same way you would read a CCR table: compare each measured level against EPA's national primary drinking water standards. Those standards give you the same MCL and action level reference points, even though no one is enforcing them on your well.

Turning a finding into the right filter

Once you know what is actually in your water, match the specific contaminant to a specific NSF/ANSI certification rather than buying a filter on general claims. The certification, not the format, is what tells you a product was tested to reduce that exact substance.

For lead, look for a product certified to NSF/ANSI 53 for lead reduction. For taste, odor, and chlorine, NSF/ANSI 42 covers aesthetic effects. For emerging contaminants like some pharmaceuticals and pesticides, look for NSF/ANSI 401. For PFAS, look for a PFAS reduction claim under Standard 53 or Standard 58. For dissolved contaminants such as nitrate, arsenic, or fluoride, a reverse osmosis system certified under NSF/ANSI 58 is the usual tool, and you should confirm the specific claim for your contaminant.

Read the product's certified claims, not the box copy. A filter certified for lead is not automatically certified for PFAS or nitrate. If you cannot find a certification listing for the contaminant your report or test flagged, treat the marketing claim as unproven and keep looking.

FAQ

When does my water report come out?: Community water systems must deliver the Consumer Confidence Report to customers by July 1 each year, covering the prior year's data. Under newer rules taking effect for 2027, systems serving more than 10,000 people will issue it twice a year, but July 1 remains the annual deadline for everyone.
What is the difference between MCL and MCLG?: MCL, the Maximum Contaminant Level, is the enforceable legal limit. MCLG, the Maximum Contaminant Level Goal, is the level with no known or expected health risk and is often lower, sometimes zero. The MCL is set as close to the goal as treatment allows, so meeting the MCL is legal but is not the same as reaching the health goal.
Is an action level the same as a safe level?: No. An action level is the concentration that triggers required treatment or other steps, not a safety threshold. The lead action level is 0.015 mg/L, or 15 parts per billion, but there is no level of lead considered safe. Treat it as a trigger for action, not a green light.
Why might my tap water differ from the CCR?: The CCR usually reflects the utility's system, often measured before the water reaches your home. Lead and copper are commonly picked up from household plumbing and service lines after that point, so your specific tap can read higher than a compliant system-wide report suggests. Home testing is the way to know your own tap.
I have a private well. How do I get a water report?: You do not receive one. Private wells are not covered by CCR rules and are not regulated by EPA, so testing is your responsibility. Test annually for coliform bacteria and nitrate, add tests for local concerns like arsenic, lead, or PFAS, and use a state-certified lab. Your state or county health department can point you to one.
My report shows PFAS as non-detect. Does that mean there is none?: Not necessarily. The federal PFAS rule sets limits, with PFOA and PFOS at 4 parts per trillion, but monitoring and compliance phase in over several years. Older reports may show no PFAS data even where PFAS is present simply because monitoring was not yet required. A home test through a certified lab can fill the gap.

Sources

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