Consumer Confidence Water Quality Report 2023City of Dubuque
City Council Meeting
Consent Items # 010.
Copyrighted
June 5, 2023
ITEM TITLE: Consumer Confidence Water Quality Report 2023
SUMMARY: City Manager providing notification that the City of Dubuque Consumer
Confidence Water Quality Report 2023 will be published documenting
the 2022 water quality results.
SUGGESTED Suggested Disposition: Receive and File
DISPOSITION:
ATTACHMENTS:
Description Type
MVM Memo City Manager Memo
2023 Water Quality Report MVM Memo Staff Memo
2023 Water Quality Report Supporting Documentation
THE C
DUjIBQTE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: City of Dubuque
Consumer Confidence Water Quality Report 2023
DATE: May 30, 2023
Dubuque
WAWca 914
ii
2007-2012.2013
2017*2019
Water Department Manager Christopher Lester is providing notification the City of
Dubuque Consumer Confidence Water Quality Report 2023 will be published
documenting the 2022 water quality results.
Mic ael C. Van Milligen
MCVM:sv
Attachment
cc: Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Christopher Lester, Water Department Manager
THE CITY OF
DUB E
Masterpiece on the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Christopher J. Lester, Water Department Manager
DATE: May 26, 2023
RE: City of Dubuque
Consumer Confidence Water Quality Report 2023
Dubuque
M[Ameriea City
VSI1lxWLCNM_ F.V={,F
2007.2012.2013
2017*2019
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 2022 water quality results.
BACKGROUND
The Iowa 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 Iowa 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, 2023. The report may be found digitally at
www.citVofdubugue.org/2023waterguality. Hard copies will also be 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 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 2022.
REQUESTED ACTION
I respectfully request the Consumer Confidence Report be placed on file.
Attachment: 2023 Consumer Confidence Report
Cc: Mary Rose Corrigan, Public Health Specialist
Randy Gehl, Public Information Officer
Chris Kohlmann, Information Services Manager
Jenny Larson, Director of Finance and Budget
Gus Psihoyos, City Engineer
Amy Scheller, Fire Chief
Tom Berger, Emergency Management
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Drinking Water Information Source Water Information �
Drinking water, including bottled water, may reasonably
be expected to contain at least small amounts of some
contaminants. The presence of contaminants does not
necessarily indicate that water poses a health risk. More
information about contaminants or potential health
effects can be obtained by submitting a form on the
Environmental Protection Agency's website at www.epa.
gov/ground-water-and-drinking-water or from the Safe
Drinking Water Hotline (800-426-4791).
Some people may be more vulnerable to contaminants
in drinking water than the general population. Immuno-
compromised persons including those with cancer
undergoing chemotherapy, persons who have undergone
organ transplants, people with HIV/AIDS or other immune
system disorders, 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/CDC guidelines on appropriate means to
lower the risk of infection by Cryptosporidium and other
microbial contaminants are available on the Environmental
Protection Agency's website at www.epa.gov/ground-water-
and-drinking-water or from the Safe Drinking Water Hotline
(800-426-4791).
Dubuque's average household water rate
for fiscal year 2024 is $35.82 per month.
This is the second lowest of Iowa's largest cities that
soften their water. The highest (West Des Moines)
is 20% higher than Dubuque and the average
is 8% higher than Dubuque,
100 gallons
of City water costs only
$0.60
Compare to 100 gallons
t _ of bottled water
(20 oz. at $1.79 each
at a convenience store)
\' costs over $1,140!
The City of Dubuque obtains water from the sand and
gravel of the Apple -Plum Alluvial aquifer and the Jordan
(Cambrian -Ordovician) aquifer. Every aquifer has a
degree of susceptibility to contamination because of the
characteristics of the aquifer, overlying materials, and
human activity including contamination from leaking
underground storage tanks, contaminant spills, and excess
fertilizer application. Susceptibility to contamination
generally increases with shallower aquifers because the
characteristics of the aquifer and the overlying materials
provide little protection from contamination at the land
surface. Susceptibility to contamination generally decreases
with deeper wells in the Jordan aquifer because the
characteristics of the aquifer and the overlying materials
provide moderate protection from contamination at the land
surface.
The Apple -Plum Alluvial aquifer is considered to be highly
susceptible to contamination, while the Jordan (Cambrian -
Ordovician) aquifer has been determined to be slightly
susceptible to contamination. A detailed evaluation of your
source water was completed by the Iowa Department of
Natural Resources, and is available on our website, www.
cityofdubuque.org/water. You may also call 563-589-4291
to obtain a copy of the report.
THE CITY OF
DUB E
Masterpiece on the Mississippi
CITY OF DUBUQUE
WATER DEPARTMENT
www.cityofdubuque.org/water
563-589-4291
r
Table Definitions
Action Level (AL) - The concentration of a contaminant that, if exceeded, triggers
treatment or other requirements that a water system must follow.
LRAA - Locational Running Annual Average
Maximum Contaminant Level (MCL) - The highest level of a contaminant that is
allowed in drinking water. MCLs are set a close to the MCLGs as feasible using the
best available technology.
Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking
water below which there is no known or expected risk to health. MCLGs allow for
a margin of safety.
Maximum Residual Disinfectant Level (MRDL) - The highest level of a drinking water
disinfectant allowed in drinking water. There is convincing evidence that addition
of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinfectant Level Goal (MRDLG) - The level of a drinking water
disinfectant below which there is no known or expected risk to health.
N/A - Not Applicable
ND - Not Detected
ppb - parts per billion
ppm - parts per million
RAA - Running Annual Average
Revised Total Coliform Rule (RTCR) - Establishes a maximum contaminant level
(MCL) based on the presence or absence of total coliforms, modifies monitoring
requirements including testing for fecal coliforms or E. coli, requires use of a
sample siting plan.
SGL - Single Sample Result
Treatment Technique (TT) - A required process intended to reduce the level of a
contaminant in drinking water.
DISTRIBUTION SYSTEM REPORT
COMPLIANCE
RANGE
ANALYTE
MCL - (MCLG)
DATE
VIOLATION
TYPICAL SOURCE
TYPE
VALUE
MIN
MAX
Total Trihalomethanes (ppb)
80 (N/A)
LRAA
56
49
61
12/31/2022
NO
By-products of drinking water chlorination
Total Haloacetic Acids (ppb)
60 (N/A)
LRAA
10
6
13
12/31/2022
NO
By-products of drinking water chlorination
Total Haloacetic Acids (ppb)
60 (N/A)
LRAA
10
7
15
12/31/2022
By-products of drinking water chlorination
Chlorine (ppm)
MRDL = 4.0
(MRDLG = 4.0)
RAA
1.1
nd
10.70
12/31/2022
NO
Water additive used to control microbes; disinfection
Coliforms are bacteria that are naturally present in the environment and are
0 positive
used as an indicator that other waterborne pathogens may be prresent, or
Total Coliform Bacteria
TT (TT)
RTCR
samples
N/A
N/A
2022
NO
that a potiential pathway exists through which contamination may enter the
drinking water.
FINISHED WATER TAP REPORT
COMPLIANCE
RANGE
ANALYTE
MCL MCLG
DATE
VIOLATION
TYPICAL SOURCE
13
TYPE
VALUE
MIN
MAX
10
Runoff from fertilizer use; Leaching from septic tanks; sewage; Erosion of
Nitrate [as NI (ppm)
10
SGL
0.68
N/A
N/A
2022
NO
natural deposits.
Water additive which promotes strong teeth; Erosion of natural deposits;
Fluoride (ppm)
4
4
MCL
0.62
0.29
0.95
7/21/2021
NO
Discharge from fertilizer and aluminum factories
Sodium (ppm)
N/A
N/A
SGL
16
N/A
N/A
7/21/2021
NO
Erosion of natural deposits; Added to water during treatment process
LEAD AND COPPER REPORT
SAMPLES
COMPLIANCE
DETECT
ANALYTE
AL
MCLG
DATE
VIOLATION
TYPICAL SOURCE
TOTAL
EXCEED AL
TYPE
VALUE
MIN.
MAX.
Corrosion of household plumbing systems;
Lead (ppb)
15
0
34
1
90th
7.00
NO
23
2020
NO
Erosion of natural deposits; Leaching from
wood preservatives
Copper (ppm)
1.3
1.3
34
0
90th
0.04
NO
0.05
2020
NO
Corrosion of household plumbing systems;
Erosion of natural deposits
Note: Contaminants with dates, indicate results from the most recent testing done in accordance with regulations.
PFAS CHEMICALS
PFAS, or perfluoroalkyl substances, are human -made
chemicals that have been used for over 70 years in
products that are resistant to heat and repel water and
oil. During production and use, PFAS do not break
down easily and can migrate into the soil, water, and
air, remaining in the environment.
The presence of PFAS in the environment is an
international issue and many communities around the
US are detecting the compounds in drinking water.
Research is still ongoing to determine how different
levels of exposure to different PFAS can impact
health, especially effects associated with low levels of
exposure over long periods of time.
Testing in the fall of 2022 showed detectable levels
of PFAS compounds in the City's finished/drinking
water and raw/untreated water from some of the City's
shallow wells. Following those findings, the City began
a quarterly testing program for its drinking water and
began maximizing water usage from its deep wells
(which are less susceptible to contamination) and only
mixing with water from shallow wells as needed.
Dubuque tap water continues to meet all federal
and state standards for drinking water safety and
customers may continue to drink tap water. The City
is exploring treatment options at the water treatment
plant that would reduce or eliminate PFAS from
shallow wells and the possibility of creating
additional deep wells. For more information, visit
www.cityofdubuque.org/pfas.
THE CITY OF
DUB E
Masterpiece on the Mississippi
For questions, contact:
Christopher Lester
Water Department Manager
563-589-4291