2019 UNREGULATED CONTAMINANT MONITORING RULE (UCMR4)


Analyte


Germanium Total


Manganese HAA5 HAA6Br HAA9 Bromide Quinoline Units Ranges ppb ppb ppb ppb ppb ppb ppb


Low- High


Avg.


Low- High


Avg.


Low- High


Avg.


Low- High


Avg.


Low- High


Avg.


Low- High


Avg.


Low- High


Avg. City of Avondale 0.36


ND-1.3 0.87


2.93 3.89 4.19


Naturally present in the environment


2.67-3.20 By-product of drinking water disinfection


3.61-4.17 By-product of drinking water disinfection


3.83-4.55 By-product of drinking water disinfection


70-710 330 ND


ND


Naturally present in the environment


Used as a pharmaceutical (anti- malarial) and flavoring agent; produced as a chemical intermediate; component of coal


Unregulated contaminant monitoring helps the EPA to determine where certain contaminants occur and whether the agency should consider regulating those contaminants in the future. UCMR4 is required monitoring between 2018-2020 for all water purveyors. For more information, visit www.epa.gov/dwucmr/fourth-unregulated- contaminant-monitoring-rule.


Perflouorobutanic acid (PFBA)


Perfluorobutanesulfonic acid (PFBS)


ppb ppb


Major Source in Drinking Water


0.33-0.43 Naturally present in the environment


Analyte Lithium


2023 UNREGULATED CONTAMINANT MONITORING RULE (UCMR5) Units Ranges


City of Phoenix


ppb


Low-High Avg.


Low-High Avg.


Low-High Avg.


2.2-160 70.2


0.005-0.006 0.005


0.007-0.016 0.011


Major Source in Drinking Water


Naturally occurring metal that may concentrate in brine waters; lithium salts are used as pharmaceuticals, used in electrochemical cells, batteries, and in organic syntheses.


PFAS are a group of synthetic chemicals used in a wide range of consumer products and industrial applications including non-stick cookware, water-repellent clothing, stain resistant fabrics and carpets, cosmetics, firefighting foams, electroplating, and products that resist grease, water, and oil. PFAS are found in the blood of people and animals and in water, air, fish, and soil at locations across the United States and the world.


Unregulated contaminant monitoring helps the EPA to determine where certain contaminants occur and whether the agency should consider regulating those contaminants in the future. UCMR5 is required monitoring between 2023-2025 for all water purveyors. For more information, visit www.epa.gov/dwucmr/fifth-unregulated-contaminant-monitoring-rule


Violation Type Explanation, Health Effects


Missed Monitoring- Disinfection By-Products (DBPs)


2023 VIOLATION SUMMARY Time Period


Avondale was notified on 2/28/2024 in regards to a missed monitoring violation for Maximum Residual Disinfection Levels (MRDLs) data taken for Quarter 4, 2023. This violation does not have health effects.


11/01/2023- 11/30/2023


Corrective Actions


Avondale is expected to include Tier 3 public notice language in their 2023 Water Quality Report (Consumer Confidence Report) by the end of Quarter 2, 2024. Compliance is then expected to be achieved by the end of Quarter 2, 2024. Avondale has reviewed and updated its sampling procedures to prevent this from happening again in the future.


We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not your drinking water meets health standards. During November 2023, we did not complete all monitoring or testing for MRDLs and therefore cannot be sure of the quality of your drinking water during that time. Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting the notice in a public place or distributing copies by hand or mail.


Source Water Assessment - The Arizona Department of Environmental Quality (ADEQ) evaluates each water source used by public water systems in Arizona. These evaluations assess the hydrogeology of drinking water sources to determine the quality of groundwater into wells, the watersheds supplying surface water, and the surveyed land activities occurring near drinking water sources. ADEQ completed an assessment of the surface waters and groundwater wells for the City of Avondale’s public water system. Based on the information available on the hydrogeologic settings and the adjacent land uses in the specified proximity of the drinking water source(s), ADEQ has given the City of Avondale’s source water a low-risk designation. A low-risk designation indicates that most source water protection measures are either already implemented by the utility, or the hydrogeology is such that the source water protection measures will have little impact on protection. Source Water Assessments are on file with the Arizona Department of Environmental Quality and available for public review at: ADEQ, 1110 W. Washington Street, Phoenix, AZ 85007 or by calling (602) 771-4641.


Monitoring Requirements Not Met for the City of Avondale - During the 2023 calendar year, the City of Avondale was required to sample the distribution system as part of the EPA’s Revised Total Coliform Rule (RTCR). These samples are required to be collected from the distribution system each month; however samples were only intermittently collected between May 1, 2023 and January 31, 2024. Once the intermittent collection was identified, samples were fully collected on February 6 and February 7 of 2024 and they all tested negative for microbiological growth. These results confirm that the City’s water quality continues to meet the federal and state guidelines for the RTCR and disinfection residual. No emergency exists; this notice is for informational purposes only. Please share this information with other people who drink this water, especially those who may not have seen this notification.


Is my water safe?


Yes. The Safe Drinking Water Act (SDWA) requires water providers to compile and present an Annual Water Quality Report (Consumer Confidence Report). This report provides details about your water sources, what it contains, and how it compares to standards set by regulatory agencies. This report is a snapshot of water quality from 2023.


Do I need to take special precautions?


No. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as those with cancer undergoing chemotherapy, people who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, and some elderly and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Water Drinking Hotline (800-426-4791).


PAGE 8 2023 AVONDALE WATER QUALITY REPORT


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12