Water Quality Reports

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The City of Monrovia's Annual Drinking Water Quality Report, also known as the Consumer Confidence Report, is a state-mandated document that includes details about where your water comes from, what it contains, and how it compares to state standards.

The City's Utility Division provides the Annual Water Quality Report. This report complies with the regulations under the Safe Drinking Water Act that requires water utilities to provide detailed water quality information to each of their customers on an annual basis.

The City is committed to providing you with this information about your water supply, because we believe that customers who are well-informed are the best allies in supporting improvements necessary to maintain the highest drinking water standards.

Annual Water Quality Report

The Water Quality Report is completed each June and provided in July.

If you have any questions regarding the Annual Water Quality Report or wish to obtain a previous year's report, please contact the Public Works Department at (626) 932-5575.

Per and Polyfluoralky Substances (PFAS)

In September 2020, the City of Monrovia received notice from the State of California to begin testing its water source for the presence of per and polyfluoralky substances. These substances, known as PFAS, are manmade chemicals that have been used in varying manufacturing processes across the United States and the world since the 1940s. Over the past several years, many states and water regulators across the Country have begun to require the testing and monitoring of PFAS. The testing for California water purveyors is required under Assembly Bill 756 which was approved in July 2019. The City was required to begin testing for these substances in October 2020.

The samples for the required tests were taken at each of the City’s water wells prior to the water reaching our water treatment system. Testing from October 2020 found the presence of PFAS in three (3) of the City’s five (5) active water wells. Working with the State Water Board, the City began to treat the water produced by those wells for PFAS in April 2022. At this time, staff is working with technical consultants to develop a response plan to the presence of PFAS, including development of additional water treatment system to further reduce the levels of PFAS in the City’s drinking water and maintain compliance with drinking water standards. As required by AB 756, the City will continue mandatory quarterly testing for PFAS and analyze the data to ensure the overall safety of our water system.

The State provides for varying levels of detection of these substances, ranging from No Detection, Notification Level, and Response Level. The samples that showed the presence of PFAS were all within the Notification Level, meaning that that Public Works Department, Utilities Division, is required to provide notice to the governing body (City Council) within thirty days. The samples were well below the Response Level, which is the highest level of PFAS concentration. If a sample were to be found in the response level, the City would be required to either provide additional water treatment to alleviate the level of PFAS in our drinking water, stop producing water from the water well, or notify water customers that a water well used to produce drinking water has exceeded the response level of PFAS concentration.

The Center for Disease Control (CDC) cites that PFAS have been associated with certain health risks, including reproductive, development, and immunological concerns including low infant birthweight, increased cholesterol levels, and cancer. Based on the most recent Environmental Protection Agency (EPA) health advisory levels on PFAS, the amount of PFAS concentration in City drinking water, would not negatively impact resident health.

It is important to note that the City’s drinking water remains safe to use and consume. The water, which is sampled and tested weekly, continues to be compliant with all standards set forth by both the EPA and State Department of Drinking Water.

If you have any additional questions or concerns, please contact the Public Works Department at (626) 932-5575.

Lead and Copper Rule Compliance

In 1991 the United States Environmental Protection Agency (EPA) established regulations to control lead and copper in drinking water, to be known as the Lead and Copper Rule. According to this rule, the City of Monrovia must perform sampling at identified testing points on a tri- annual basis. Pursuant to the Lead and Copper Rule, the action level for lead is a test result of 0.015 ug/L or 15 parts per billion.

At the below links are more information about the Lead and Copper Rule as well as the City's lead test results for the last 4 testing years.

Lead Testing in Schools- AB 746

AB 746 became effective on January 1, 2018 and it required that water systems, like the City of Monrovia, test the drinking water for lead at all public K-12 schools. The City completed this testing by July 1, 2019, in accordance with the legislation. The results of this testing returned non-detectable levels of lead in the water for all school sites in Monrovia.