How to Read Your Water Quality Report (CCR)
A guide to understanding your city's Consumer Confidence Report and what the numbers mean.
What is a CCR?
Every water utility must publish an annual Consumer Confidence Report (also called a Water Quality Report). It lists detected contaminants, the levels found, and how they compare to federal limits. You can request one from your utility or usually find it online.
Key numbers to look for
Hardness: Listed in PPM or mg/L. Above 120 PPM is where a softener starts making a difference. PFAS: Any detection above 4 ppt exceeds the 2024 EPA standard. Lead: The 90th percentile action level is 15 ppb, but there is no safe level. Disinfection byproducts (TTHM, HAA5): These are chlorine reaction products linked to cancer risk at high levels.
What the CCR does not tell you
The CCR tests water leaving the treatment plant, not at your tap. Lead, copper, and bacteria can enter water from your building's plumbing. For the most accurate picture of your specific tap, home testing is recommended. Start by looking up your city.