Consumer Confidence Report for 2015

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

ANNUAL DRINKING WATER QUALITY REPORT FOR 2015
TOWN OF CENTREVILLE
PWSID # 0170001
JUNE 2016
We are 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 would
like 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 Town Hall.
Some individuals may be more vulnerable to contaminants in drinking water than the general
population. Immuno-compromised persons such as persons; with cancer undergoing
chemotherapy, who have undergone organ transplants, with HIV/AIDS or other immune system
disorders, some elderly and infants can be particularly at risk from infections. These individuals
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 would like our valued customers to be informed about their water utility. If you would like 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 Sam Bozarth, Water/Wastewater Supervisor 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, 2015. 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 have 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.
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 Measurement
Radioactive Contaminants
Beta/photon emitters N 8.6 pCi/L 0 50 Decay of natural and man-made
(2012) deposits
Inorganic Contaminants
Arsenic (average) N ppb n/a 10 Erosion of natural deposits; runoff
(range) (2015) 0 - 6 from orchards; runoff from glass and
Highest Level Detected 7 electronics production wastes
Copper (distribution) N 0.104 ppm 1.3 AL=1.3 Corrosion of household plumbing
(2015) systems; erosion of natural deposits;
leaching from wood preservatives
Fluoride (2014) N 0.46 ppm 4 4 Erosion of natural deposits; water
additive which promotes strong teeth;
discharge from fertilizer and
aluminum factories
Chlorine (2015) N 0.9 ppm 4 4 Water Additive used to control
microbes
Barium (2014) N 0.1 ppm 2 2 Discharge of drilling wastes;
discharge from metal refineries;
erosion of natural deposits
Volatile Organic Contaminants
TTHM (distribution) N 1 5 ppb 0 80 By-product of drinking water
[Total trihalomethanes] chlorination
(2015)
Haloacetic Acids (HAA5) N 10 ppb 0 60 By-product of drinking water
(distribution) (2015) chlorination
Note: Test results are for year 2015 or as indicated; not all contaminants are required to be tested for annually. These are our most recent
results.

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0 1 positive monthly 1 0 N Naturally present in the
sample. environment.
NOTE: Lead is tested for triennial (every 3 years) in accordance with Federal and State Regulations in
Centreville’s distribution system, and was not detected in our most recently collected samples 2015.
If present, elevated levels of 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. The Town of Centreville is responsible for
providing high quality drinking water, but cannot control the variety of materials used in
plumbing components. When your water has been sitting for several hours, you can minimize
the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using
water for drinking or cooking. If you are concerned about lead in your drinking water, you may
wish to have your water tested. Information on lead in drinking water, testing methods, and
steps you can take to minimize exposure is available from the EPA Safe Drinking Water Hotline
at 1-800-426-4791 or 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.
All sources of drinking water are subject to potential contamination by substances that are
naturally occurring or manmade. 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.
Monitoring and Reporting Violation of the Safe Drinking Water Act
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 October to December 2015, we did not complete testing for Arsenic,
and therefore cannot be sure of the quality of our drinking water during that time; a total of
two (2) drinking water samples were to have been collected and tested for Arsenic. Please be
advised the water samples from the quarter prior to October 2015 and the quarter immediately
following December 2015 met health standards. Additional testing will be conducted during
2016.
For additional information please contact, Sam Bozarth, Water/Wastewater Supervisor at 410-
758-1180.

Thank you for allowing us to continue providing 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.
Please call Sam Bozarth, Water/Wastewater Supervisor at 410-758-1180 if you have questions
about this report.