Consumer Confidence Report for 2022

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

ANNUAL DRINKING WATER QUALITY REPORT FOR 2022
TOWN OF CENTREVILLE
PWSID # 0170001
APRIL, 2023
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 Kip Mathews Director of 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, 2022. 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
Chlorine (2022) N 0.5-0.6 ppm 4 4 Water Additive used to control
microbes
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 2022 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 – or 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.
Beginning in 2020, the Maryland Department of the Environment (MDE) initiated a PFAS
monitoring program. Our water system was not tested for PFAS in 2022. In March 2023,
EPA announced proposed Maximum Contaminant Levels (MCLs) of 4 ppt for PFOA and 4
ppt for PFOS, and a Group Hazard Index for four additional PFAS compounds. Future
regulations would require additional monitoring as well as certain actions for systems above
the MCLs. EPA will publish the final MCLs and requirements by the end of 2023 or
beginning of 2024. Additional information about PFAS can be found on the MDE website:
mde.maryland.gov/PublicHealth/Pages/PFAS-Landing-Page.aspx
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.
Violation:
Lead Consumer Notice (LCR) Period of Violation 01/01/2022 to 01/28/2022. We failed to provide the
results of lead tap water monitoring to the consumers at the location water was tested. These were
supposed to be provided no longer than 30 days after learning the results.
Revised Total Coliform Rule MCL, E. COLI, POS E. COLI (RTCR) Period of Violation 06/01/2022
06/30/2022 E. coli bacteria were found in our drinking water during the period indicated in violation of a
standard. We had an E.coli positive routine or repeat sample or we failed to test for E. coli when any repeat
sample tests positive for total coliform.
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.