CONSUMER CONFIDENCE REPORTS

A Consumer Confidence Report (CCR), which may also be called an annual water quality report or a drinking water quality report, provides information on your local drinking water quality. Every community water supplier must provide an annual report by July 1 of each year to its customers, according to the U.S. Environmental Protection Agency (EPA).

KMPWCO routinely tests the drinking water quality for many constituents, as required by State and Federal Regulations.

All CCRs must contain certain content elements. The specific information in your CCR is tailored to your local water syste .

Knowing your water source is important because germs, chemicals and minerals – known as contaminants – may exist at varying levels, depending on the source. Your water comes from surface water in open space land within less that 1-2 miles of your home.

Levels of Contaminants in your Water Source

Keep in mind that while some things listed as “contaminants” in your CCR can be harmful to your health, others can be good for you, such as the appropriate amount of a disinfectant that keeps your water safe from germs. Knowing what levels of contaminants are in your water source—and whether those contaminants are actually harmful—can help you to determine whether or not you should take additional precautions in protecting yourself and your family from potential water-related illnesses.

Here is an informative document which can assist you in interpreting the data on the Water Quality Reports.

EPA Standards for Safe Contaminant Levels
The EPA determines what levels of contaminants are safe to have in your water, and your CCR will show you whether or not your water source has a higher level of contaminants than recommended. It is most important to pay attention to whether contaminant levels are marked as “violated,” meaning the level is higher than EPA allows. This will be the best indication of how the contaminants in your water source might affect your health.

Information about Cryptosporidium
All CCRs are required to provide general information on Cryptosporidium, a parasite that can cause a severe diarrheal illness, because it can be dangerous for persons with severely weakened immune systems, even at low levels. It is also very tolerant of chlorine disinfection. This section exists on every CCR and does not necessarily indicate the presence of Cryptosporidium in your drinking water. (Note: Current members of the KMPWCO water company do not recall ever testing positive for cryptosporidium, a positive track record which spans perhaps decades back).
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Other Relevant Information about your Water
CCRs often include additional information tailored to your water source that will help to provide a better understanding of where your water comes from and how safe it is.

Reports
Below are the annual KMPWCO Consumer Confidence Reports (CCR), as issued by the County of San Mateo:

        2023 Consumer Confidence Report
        2022 Consumer Confidence Report
​        2021 Consumer Confidence Report
        2020 Consumer Confidence Report
        2019 Consumer Confidence Report
        2018 Consumer Confidence Report
        2017 Consumer Confidence Report
        2016 Consumer Confidence Report
        2015 Consumer Confidence Report
        ​2014 Consumer Confidence Report
        2013 Consumer Confidence Report
        2012 Consumer Confidence Report
        2011 Consumer Confidence Report
        2010 Consumer Confidence Report
        2009 Consumer Confidence Report
        2008 Consumer Confidence Report
        2007 Consumer Confidence Report
        ​2006 Consumer Confidence Report

WATERSHED SANITARY REPORTS

As a requirement of the California Code of Regulations, we periodically review the health of the watershed.
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Members of the KMPWCO continue to benefit from the extremely high quality of our drinking water. Below are the Watershed Surveys for our water system.

        2015 Watershed Sanitary Survey
​        2011 Watershed Sanitary Survey

WATERSHED TREATMENT AND DISINFECTION

​Surface water sources, such as creeks and streams, typically require more complex treatment because they are exposed to the natural environment. All of our water is disinfected to protect you from waterborne diseases. Disinfection of drinking water has made many once-common diseases, like typhoid and cholera, a thing of the past in the United States and other developed countries.
Chlorine is a common disinfectant used to treat the water. If you detect a chlorine taste or smell in your water, try refrigerating it before drinking. More data can be found in your annual water quality report.