How to Read Your Consumer Confidence Report (CCR)

The Consumer Confidence Report (CCR) is the annual water quality report your public water system must provide (by July 1 for the previous calendar year). If you get a water bill, you should get a CCR — often by mail, email, or a link on the public water system website.

Think of it as the public water system's report card: what was detected, at what levels, and how that compares to EPA limits. It is not a substitute for testing yourplumbing, but it is the best free overview of your supplier's water.

Where to get your CCR

Search “[your city] water consumer confidence report” or call the number on your bill. Large systems usually post PDFs online. If you rent, the landlord may not forward it — pull it directly from the water provider.

What to look for first

1. Water source

Surface water (rivers, lakes) and groundwater behave differently. Surface sources often have more organic matter and disinfection byproducts; groundwater may have different mineral and natural contaminant profiles.

2. Detected vs. not detected

Public water systems test for many contaminants; “not detected”does not always mean zero — it means below the lab's reporting limit for that test. A detection at any level deserves context next to the EPA limit.

3. The MCL column

The Maximum Contaminant Level (MCL) is the legal limit. Numbers above the MCL are violations. Numbers below the MCL can still matter for health depending on the contaminant and who drinks the water.

Lead and copper: read carefully

Lead results in a CCR often reflect system-wide sampling programs, not necessarily the water at your kitchen tap. If you have lead service lines or older plumbing, consider a certified lead test and a filter certified for lead (NSF/ANSI 53).

Disinfection byproducts (TTHM, HAA5)

Chlorine (or chloramine) reacting with organic matter forms trihalomethanes (TTHM) and haloacetic acids (HAA5). CC Rs usually report running annual averages. If you are close to limits, a certified carbon filter or RO for drinking water can reduce exposure.

Bottom line

Your CCR is the official yearly snapshot from the supplier. Read the tables once, note what was detected, then decide whether point-of-use filtration or further testing makes sense for your home.