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City of Dubuque Consumer Confidence Water Quality Report 2026 Copyrighted June 1, 2026 City of Dubuque CONSENT ITEMS # 7. City Council ITEM TITLE: City of Dubuque Consumer Confidence Water Quality Report 2026 SUMMARY: City Manager submitting the City of Dubuque Consumer Confidence Water Quality Report 2026. The City of Dubuque drinking water met all state and federal water quality requirements and had no drinking water violations in 2025. SUGGUESTED Receive and File DISPOSITION: ATTACHMENTS: 1. MVM Memo City of Dubuque Consumer Confidence Water Quality Report 2026 2. 2025 CCR City Manager Memo 5.26.26 3. 2026 Water CCR for Web Page 527 of 1000 Dubuque THE CITY OF � uhA�eMa cin DuB E ; . � , I � � I. Maste iece on the Mississi t 2oo�•zoiz•zois �P Pp zoi�*zoi9 TO: The Honorable Mayor and City Council Members FROM: Michael C. Van Milligen, City Manager SUBJECT: City of Dubuque Consumer Confidence Water Quality Report 2026 DATE: May 28, 2026 Water Department Director Chris Lester is submitting the City of Dubuque Consumer Confidence Water Quality Report 2026. The City of Dubuque drinking water met all state and federal water quality requirements and had no drinking water violations in 2025. v Mic ael C. Van Milligen MCVM:sv Attachment cc: Crenna Brumwell, City Attorney Cori Burbach, Assistant City Manager Christopher Lester, Water Department Director Amy Scheller, Fire Chief Jenny Larson, Chief Financial Officer Gus Psihoyos, City Engineer Joe Pregler, Chief Information Officer Mary Rose Corrigan, Public Health Director Tom Berger, Emergency Management Director Randy Gehl, Public Information Officer Nick Connolly, Water Operations Supervisor Page 528 of 1000 Dubuque THE CITY OF � All•Merioa Ciry D V L L xn�xai�n � I �,�� Maste iece on the Mississi i zao��zolz'2013 rP pp zoi�*zoi9 TO: Michael C. Van Milligen, City Manager FROM: Christopher J. Lester, Water Department Director DATE: May 26, 2026 RE: City of Dubuque Consumer Confidence Water Quality Report 2026 PURPOSE The purpose of this memorandum is to provide notification that the City of Dubuque will be publishing its annual consumer confidence report documenting the 2025 water quality results. BACKGROUND The lowa Administrative Code (the Code) 567-42.1(2) identifies the notification and procedure requirements for publicly owned and operated water supplies. The purpose of the notification procedure is to protect public health. The lowa Department of Natural Resources assists local water supply owners with compliance of the Code and provides a detailed report containing information regarding the water quality of each public water supply. DISCUSSION The reports are required to be published and distributed to each water system's customers on or before July 1, 2026. The report may be found digitally at https://www.cityofdubuque.orq/2026waterquality. Hard copies are also available from the following locations: the Eagle Point Water Treatment Plant, Water Distribution Office in the Municipal Service Center, City Hall, the City Hall Annex, Multicultural Family Center, Carnegie- Stout Public Library, Water& Resource Recovery Center, City of Dubuque Jule Intermodal, and upon request by contacting the Water Department. The City of Dubuque drinking water met all state and federal water quality requirements and had no drinking water violations in 2025. REQUESTED ACTION I respectfully request the Consumer Confidence Report be placed on file. Attachment: 2026 Consumer Confidence Report Cc: Amy Scheller, Fire Chief Jenny Larson, Chief Financial Officer Gus Psihoyos, City Engineer Joe Pregler, Chief Information Officer Mary Rose Corrigan, Public Health Director Tom Berger, Emergency Management Director Randy Gehl, Public Information Officer Nick Connolly, Water Operations Supervisor Page 529 of 1000 • �i THE CITY OF � DuB E €� , ,�, � _ ',�� +� INFORMATION Masterpiece on the Mississippi , �� ,�;,"' � � � �i�� — '��:- _ " - �`s L '"�, ' Drinking water, including bottled water,may AN N UAL � � �� - ��Y.�; . reasonably be expected to contain at least - P � small amounts of some contaminants. y� The presence of contaminants does not T " ' necessarily indicate that water poses - a health risk. More information about Q U A L I TY R E P O R T contaminants or potential health effects can be obtained by submitting a form on the 2 0 2 5 D R I N K I N G Environmental Protection Agency's website � � � „� ,�. � �g- W�� V ) or from the Safe Drinking Water � 1 Hotline (800-426-4791). Some people may be more vulnerable to �� The City of Dubuque's Water Department is contaminants in drinking water than the . proud of the high quality of the City's readily general population. Immunocompromised ' � available water supply,which meets all state persons,including those with cancer � and federal drinking water quality requirements. undergoing chemotherapy,persons who � � ', � ` � have undergone organ transplants, people � _ <1 1� ��. �;r� We are pleased to inform you with HIV/AIDS or other immune system .� � , , that Dubuque had no drinking disorders,some elderly,and infants can be � � � `` Wqt@1' VIO�qtIO11S I11 2025. particularly at risk from infections.These - f � �: �:;�•; �' 3'h, � The City's water quality testing results shown people should seek advice about drinking �t� � ` �"-=' �,l ,' ,��.� in this report include testing for regulated water from their health care providers. � � - �,,'��' � ` ',,';.� contaminants that were at detectable levels ' ' �'- in the distributed water.The contaminants EPA/CDC guidelines on appropriate ':.• � � �� .. �!� �,'.: •, �I ' ' o. or analytes are reported in comparison to a means to lower the risk of infection by ��' �"��' ��' ,N�.�, maximum contaminant level (MCL) established Cryptosporidium and other microbial '� ��•'�•�� 1. -==--., � .� by the U.S. Environmental Protection Agency's contaminants are available on the � __-_ � (EPA) Safe Drinking Water Act.Testing is not Environmental Protection Agency's website �� _� required for each parameter every year. ( ,,,,�g ,// /.� �� w. ) or from the Safe Drinking Water Hotline (800-426-4791). � R�r ni ioci'_'_- n�n Lc�Ct. ' Christopher Lester � Water Department Director 563-589-4291 Page 530 of 1000 Dubuque's average household SOURCE WATER LEAD & COPPER water rate for fiscal year 202� INFORMATION REPORTING is $23.1� per month.* This is the second lowest of lowa's largest If present,elevated levels of lead can cause cities that soften their water.The highest The City of Dubuque obtains water from serious health problems,especially for (Cedar Rapids) is 32% higher than Dubuque the sand and gravel of the Apple-Plum pregnant women and young children. Lead in and the average is 16.2% higher than Dubuque. Alluvial aquifer and the Jordan (Cambrian- drinking water is primarily from materials and Ordovician) aquifer. Every aquifer has a components associated with service lines *Average household rate based on 3,200 degree of susceptibility to contamination and home plumbing.The Dubuque Water gallons per month because of the characteristics of the aquifer, Department is responsible for providing high- overlying materials,and human activity, quality drinking water but cannot control loo gallons of City water including contamination from leaking the variety of materials used in plumbing underground storage tanks,contaminant components.You can help protect yourself costs only $0.72 spills,and excess fertilizer application. and your family by identifying and removing lead materials within your home plumbing Compare to 100 gallons of bottled water and taking steps to reduce your family's risk. (20 oz.at$2.41 each),which costs over$1,540. Susceptibility to contamination generally increases with shallower aquifers because � Using an American National Standards the characteristics of the aquifer and the Institute (ANSI) certified filter is effective overlying materials provide little protection in reducing lead exposures. Follow the from contamination at the land surface. instructions provided with the filter to ensure Susceptibility to contamination generally the filter is used properly. Use only cold water _ . ` decreases with deeper wells in the Jordan for drinking,cooking,and making baby �� aquifer because the characteristics of the formula. Boiling water does not remove lead � aquifer and the overlying materials provide from water. �� t moderate protection from contamination at � the land surface. Before using tap water for drinking,cooking, �` or making baby formulas,flush your pipes for �, �'�' ��,�"' several minutes.You can do this by running � !�,�` The Apple-Plum Alluvial aquifer was � � determined to be highly susceptible to your tap,taking a shower,doing laundry � or a load of dishes. If you have a lead or � contamination,while the Jordan (Cambrian- galvanized service line,you may need to Ordovician) aquifer has been determined to flush your pipes for a longer period. Lead be slightly susceptible to contamination. tap sampling data can be found in the lowa Drinking Water Data Portal at _ , A detailed evaluation of your source water Jov/iowadrinkingwc,_ . 1 `� was completed by the lowa Department of ` 1 Natural Resources and is available on our The Dubuque Water Department has �� . Ee•B5� � website at cit, .You completed a comprehensive service line �'� may also call 563-589-4291 to obtain a � �� copy of the report. �� ' - Page 531 of 1000 inventory.Please contact us for information CITY OF DUBUQUE TABLE DEFINITIONS regarding the inventory and how you can a��ess the resu�ts. WATER DEPARTMENT Action Level (AL) - The concentration of If you are concerned about lead in your water, a contaminant that,if exceeded,triggers and would like to have your water tested, please The Dubuque Water Department is treatment or other requirements that a water contact the Water Department at 563-589-4291. dedicated to producing and delivering system must follow. Additionally,information on lead in drinking drinking water that is in compliance with all water,testing methods,and steps to minimize state and federal drinking water standards. LRAA- Locational Running Annual Average exposure can be found on the Environmental Protection Agency's website at epa.gov/ Maximum Contaminant Level (MCL) - The The City of Dubuque's distribution system safewater/lead. is composed of 330.4 miles of water mains highest level of a contaminant that is allowed ranging from 4-inches to 30-inches in in drinking water. MCLs are set as close to the MCLGs as feasible using the best available diameter,8,008 control valves,and 2,606 technology. PFAS CHEMICALS flre hydrants throughout the city. Maximum Contaminant Level Goal (MCLG) It is our goal to operate and maintain a - The level of a contaminant in drinking water The Dubuque Water Department recognizes water distribution system consistent with below which there is no known or expected risk concerns about PFAS and works to reduce established procedures recognized by to health. MCLGs allow for a margin of safety. potential exposure to these chemicals. In the American Water Works Association 2025, PFAS levels in Dubuque's drinking water for efficient management practices.We Maximum Residual Disinfectant Level (MRDL) - remained within the Environmental Protection continually strive to adopt new and better The highest level of a drinking water disinfectant Agency's lifetime interim health advisory limits. methods of delivering the best quality allowed in drinking water. There is convincing For more information,visit evidence that addition of a disinfectant is drinking water. necessar for control of microbial contaminants. PF� or the Environmental Protection Agency's Y PFAS webpage:epa.gov/�- . Maximum Residual Disinfectant Level Goal (MRDLG) - The level of a drinking water ,._,��„� � \�. � �,�F disinfectant below which there is no known or �- expected risk to health. .�„ N/A- Not Applicable DT,� � ND- Not Detected u ppb- Parts Per Billion / ppm- Parts Per Million �� M�� - ' � RAA- Running Annual Average �.�..:�z,._,.._. r ,� � < �� Yt�i' �:a.� +�.�...,aF e �� M1I � '.'. .�� r y _ r '.s^ l � I � f� �� ---�,��>�.�,�� t. I � i i i �..,s� �"�3.:' ��. . i . ' - � ��o� " . � �. .�� . �a��_s-l'�-'l�` � �� ' �r` .y' t ' �� .�� V� . � '� .. - t "r � r-�`a �� . =-. �; "� �r k,:� ''y Page 532 of 1000 � �r`- 7 Tr��: .,.�. '.+ .. . �''._��*:.,. _ � � ..r —1- �-��'� _ � : t � I THE CITY OF Revised Total Coliform Rule(RTCR) - Establishes a SGL- Single Sample Result �UB E maximum contaminant level (MCL) based on the presence or absence of total coliforms, modifies Treatment Technique(TT) - A required process Masterpiece on the Mississippi monitoring requirements including testing for fecal intended to reduce the level of a contaminant in cityofdubuque.org�water coliforms or E.coli, requires use of a sample siting drinking water. plan. 563-589-4291 . - COMPLIANCE RANGE ANALYTE MCL- (MCLG� DATE VIOLATION TYPICAL SOURCE TYPE VALUE MIN MAX Totql TrihqlomethqneS(ppb� 80 (N�A� LRAA 57 40 80 3�31�2025 NO By-products of drinking water chlorination Total Haloacetic Acids(ppb) 60 (N�A� LRAA 6 6 7 3�31�2025 NO By-products of drinking water chlorination MRDL=4.0 Chlorine(ppm) RAA 1.1 0.39 1.79 12/31/2025 NO water additive used to control microbes;disinfection (MRDLG=4.0� COMPLIANCE RANGE ANALYTE MCL MCLG DATE VIOLATION TYPICAL SOURCE TYPE VALUE MIN MAX Runoff from fertilizer use;Leaching from septic tanks;sewage; Nitrate[as N] (ppm) 10 10 SGL 0.58 N/A N/A 2025 NO Erosion of natural deposits. Fluoride(ppm� 4 4 SGL 0.62 N�A N�A 7�21�2021 NO Wpter additive which promotes strong teeth;Erosion of natural deposits;Discharge from fertilizer and aluminum factories Erosion of natural deposits;Added to water during treatment Sodium(ppm) N/A N/A SGL 14 N/A N/A 7/10/2024 NO process SAMPLES COMPLIANCE DETECT ANALYTE AL MCLG DATE VIOLATION TYPICAL SOURCE TOTAL EXCEED TYPE VALUE MIN. MAX. Corrosion of household plumbing Lead (ppb) 15 0 30 0 90th 5.00 ND 11 2023 NO systems;Erosion of natural deposits; Leaching from wood preservatives Copper(ppm) 1.3 1.3 30 0 90th 0.03 ND 0.05 2023 NO Corrosion of household plumbing systems;Erosion of natural deposits Page 533 of 1000