Consumer Confidence Report for 2023

Exactly as extracted, unformatted — for checking against the original. The readable version is easier to read.

ANNUAL DRINKING WATER QUALITY REPORT FOR 2023
TOWN OF CENTREVILLE
PWSID # 0170001
APRIL, 2024
We're pleased to present to you this year's Annual Water Quality Report. This report is designed
to inform you about the water quality and services we deliver to you every day. Our constant goal
is to provide you with a safe and dependable supply of drinking water. We want you to understand
the efforts we make to continually improve the water treatment process and protect our water
resources. We are committed to ensuring the quality of your water. The Town’s water source is
located in the Aquia formation.
The Maryland Department of the Environment’s Water Supply Program completed a Source Water
Assessment for the Town of Centreville in 2003. A copy of that assessment can be reviewed at
City Hall. For more information call 1-800-633-6101.
https://mde.maryland.gov/programs/Water/water_supply/Source_Water_Assessment_Program/Pages/by_county.asp
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Some people may be more vulnerable to contaminants in drinking water than the general
population. Immuno-compromised persons such as persons 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 lessen the risk of infection by cryptosporidium and other
microbiological contaminants are available from the Safe Drinking Water Hotline (800-426-4791).
We want our valued customers to be informed about their water utility. If you want to learn more,
please attend any of our regularly scheduled town meetings held on the first and third Thursday of
each month at 7:00 pm at the Liberty building, 107 North Liberty Street.
If you have any questions about this report or have questions concerning your water quality, please
call Public Works at 410-758-1180.
The Town of Centreville routinely monitors for contaminants in your drinking water according to
Federal and State laws. This table shows the results of our monitoring for the period of January 1st
to December 31st, 2023. As water travels over the land or underground, it can pick up substances
or contaminants such as microbes, inorganic and organic chemicals, and radioactive substances.
All drinking water, including bottled drinking water, may be reasonably expected to contain at
least small amounts of some contaminants. It's important to remember that the presence of these
contaminants does not necessarily pose a health risk.
In this table you will find many terms and abbreviations you might not be familiar with. To help
you better understand these terms we've provided the following definitions:
Parts per million (ppm) or Milligrams per liter (mg/l) - one part per million corresponds to one

minute in two years or a single penny in $10,000.
Parts per billion (ppb) or Micrograms per liter - one part per billion corresponds to one minute in
2,000 years, or a single penny in $10,000,000.
Parts per trillion (ppt) or Microgram per liter- one part per trillion corresponds to one minute in
2,000,000 years, or a single penny in $10,000,000,000.
Picocuries per liter (pCi/L) - picocuries per liter is a measure of the radioactivity in water.
Action Level - the concentration of a contaminant which, if exceeded, triggers treatment or other
requirements which a water system must follow.
Maximum Contaminant Level - The “Maximum Allowed” (MCL) is the highest level of a
contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible
using the best available treatment technology.
Maximum Contaminant Level Goal - The “Goal”(MCLG) is 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.
TEST RESULTS
Contaminant Violation Level Unit MCLG MCL Likely Source of Contamination
Y/N Detected Measureme
nt
Radioactive Contaminants
Beta/photon emitters N 10.4 pCi/l 0 50 Decay of natural and man-made
(2021) deposits
Combined Radium N 0.2-0.3 pCi/l 0 5 Erosion of natural deposits
226/228 (2021)
Inorganic Contaminants
Copper (distribution) N 0.1003 ppm 1.3 AL=1.3 Corrosion of household plumbing
(2021) systems; erosion of natural deposits;
leaching from wood preservatives
Arsenic (2023) N 10.2 ppb 0 10 Erosion of natural deposits; Runoff
Averge 0-10.2 from orchards; Runoff from glass and
electronics production waste
Disinfection and disinfection By- Products
Chlorine (2023) N 0.6- 0.9 ppm 4 4 Water Additive used to control
microbes
Haloacetic Acids (2023) N 2 ppb No 60 By-product of water disinfection
goal for
Average 1.94-1.94 the
total
Total Trihalomethanes N 4 ppb No 80 By-product of water disinfection
(2023) goal for
Average 3.6-3.6 the
total
Chloroform (2023) N 0.77 ppb No 5 Occurs naturally in water
goal for
the
total

Barium (2020) N 0.11- 0.134 ppm 2 2 Discharge of drilling wastes;
discharge from metal refineries;
erosion of natural deposits
Regulated Contaminants
Coliform Bacteria N 2 n/a 0 0 Naturally present in the
environment
Note: Test results are for year 2023 or as indicated; not all contaminants are required to be tested for annually. These are our most recent
results.
NOTE: lead, which is tested for triennial (every 3 years) in accordance with Federal and State
Regulations in Centreville’s distribution system, was not detected in our most recently collected
samples ..
Lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water
is primarily from materials and components associated with service lines and home plumbing. Centreville is
responsible for providing high quality drinking water and removing lead pipes, but cannot control the variety of
materials used in plumbing components in your home. You share the responsibility for protecting yourself and your
family from the lead in your home plumbing. You can take responsibility by identifying and removing lead
materials within your home plumbing and taking steps to reduce your family's risk. Before drinking tap water, flush
your pipes for several minutes by running your tap, taking a shower, doing laundry or a load of dishes. You can also
use a filter certified by an American National Standards Institute accredited certifier to reduce lead in drinking
water. If you are concerned about lead in your water and wish to have your water tested, contact Centreville at 410-
758-1180. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is
available at http://www.epa.gov/safewater/lead.
MCL’s are set at very stringent levels. To understand the possible health effects described for many regulated
contaminants, a person would have to drink 2 liters of water every day at the MCL level for a lifetime to have a one-
in-a-million chance of having the described health effect.
While your drinking water meets EPA’s standard for arsenic, it does contain low levels of arsenic. EPA’s
standard balances the current understanding of arsenic’s possible health effects against the cost of
removing arsenic from drinking water. EPA continues to research the health effects of low levels of arsenic,
which is a mineral known to cause cancer in humans at high concentrations and is linked to other health
effects such as skin damage and circulatory problems. We are continuing to monitor arsenic on a quarterly
basis. We currently monitor for this contaminant on a quarterly basis.
PFAS – short for per- and polyfluoroalkyl substances – refers to a large group of more than 4,000 human-
made chemicals that have been used since the 1940s in a range of products, including stain- and water-
resistant fabrics and carpeting, cleaning products, paints, cookware, food packaging and fire-fighting
foams. These uses of PFAS have led to PFAS entering our environment, where they have been
measured by several states in soil, surface water, groundwater, and seafood. Some PFAS can last a
long time in
the environment and in the human body and can accumulate in the food chain.
The Maryland Department of the Environment (MDE) conducted a PFAS monitoring program for
Community Water Systems from 2020 to 2022. The results are available on MDE’s website:
https://mde.maryland.gov/PublicHealth/Pages/PFAS-Landing-Page.aspx.
The Environmental Protection Agency (EPA) finalized regulations for 6 PFAS compounds in drinking
water in April 2024. The MCLs for PFOA and PFOS are each 4.0 parts per trillion (ppt). The MCLs for
PFNA, PFHxS, and HFPO-DA (GenX chemicals) are each 10 ppt. Additionally, a mixture of two or more
of the following chemicals (PFNA, PFHxS, HFPO-DA, and PFBS) will be regulated with a Hazard Index of

1 (unitless) to determine if the combined levels of these PFAS pose a risk and require action.
The 5th Unregulated Contaminant Monitoring Rule (UCMR5) began testing for 29 PFAS compounds and
lithium in 2023, and testing will run through 2025. The UCMR5 should test all community water systems
with populations of at least 3300 people. Three randomly selected systems in Maryland with populations
less than 3300 people will also be tested under the UCMR5. Detections greater than the minimum
reporting levels for each constituent should be reported in the CCR.
All sources of drinking water are subject to potential contamination by substances that are naturally occurring or man-
made. These substances can be microbes, inorganic or organic chemicals and radioactive substances. All 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 the water poses a health risk. More information about
contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s Safe
Drinking Water Hotline at 1-800-426-4791.
The Maryland Rural Water Association’s State Circuit Rider assisted with the completion of this report.
Thank you for allowing us to continue providing your family with clean, quality water this year. In order to maintain
a safe and dependable water supply we sometimes need to make improvements that will benefit all of our customers.
These improvements are sometimes reflected as rate structure adjustments. Thank you for understanding.