Consumer Confidence Report for 2015

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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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.