Consumer Confidence Report for 2024

ANNUAL DRINKING WATER QUALITY REPORT FOR 2024

TOWN OF CENTREVILLE

PWSID # 0170001

MAY, 2025

The Town of Centreville is pleased to present 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, please call 1-800-633-6101.

https://mde.maryland.gov/programs/Water/water_supply/Source_Water_Assessment_Program/Pages/by_county.asp x 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 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 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, located at 107 North Liberty Street, Centreville, MD 21617.

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, 2024. 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 pCi/l 0 50 Decay of natural and man-made (Highest level) 9.7 deposits (Range) 9.7-9.7 (2024) Combined Radium N 0.2-0.3 pCi/l 0 5 Erosion of natural deposits 226/228 (2021) Inorganic Contaminants 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 (2024) N ppm 4 4 Water Additive used to control (Highest Level Detected) 0.9 microbes Range 0.6- 0.9 Haloacetic Acids (2024) N 1.94 ppb No 60 By-product of water disinfection HAA5 goal for Average 1.94-1.94 the total Total Trihalomethanes N 3.6 ppb No 80 By-product of water disinfection

(2024) TTHM goal for Average 3.6-3.6 the total Chloroform (2024) N 2.59 Ug/L No 5 Occurs naturally in water goal for the total Barium (2020) N 0.11- ppm 2 2 Discharge of drilling wastes;

0.134 discharge from metal refineries;

erosion of natural deposits Regulated Contaminants Coliform Bacteria Total Highest Fecal Total Violation Likely source of Maximum Containment Level Goal Coliform No. of Coliform or number Contamination maximu Positive ecoli of m maximum positive e containm containment coli or ent level level fecal coliform samples 1 Naturally present in the 0 positive 2 0 N Environment monthly sample Viola 90th Range of Units MCLG (AL Limits) Likely Source of Contamination

Lead and Copper tion Percen Tap or / # Sites Y/N tile Sampling MRDLG Over Copper (distribution) N 0.142 0.0200- ppm 1.3 AL= 1.3 Corrosion of household plumbing (2024) 0.1993 systems; erosion of natural deposits;

leaching from wood preservatives Zero (0) Lead (distribution) N 5 <0.0050- ppb 0 AL= 15 Corrosion of household plumbing (2024) 0.0136 systems; erosion of natural deposits;

leaching from wood preservatives Zero (0) Note: Test results are for the year 2024 or as indicated; not all contaminants are required to be tested annually. These are the most recent results.

An initial inventory of service line pipe materials located within our service area required to be submitted to the Maryland Department of the Environment (MDE) by October 16, 2024. The Town of Centreville submitted the service line inventory report by the deadline, and the “report is available upon request”.

Centreville has completed the service line inventory required by U.S. EPA’s Lead and Copper Rule Revisions (initial inventory due October 16th, 2024) For more information on our service line inventory please call 410-758-1180.

Through completing a records review, it has been determined it has no Lead or Galvanized Replacement (GRR) service lines in its distribution system. This includes all system owned and customer portions of all service lines regardless of actual or intended use.

Construction records, meter replacements, and distribution maps were used to help us determine the composition of our systems service lines.

Centreville has reviewed all applicable sources of information to complete the inventory and will continue to identify and track service line materials as they are encountered during normal operations. If, in the future, a Lead or Galvanized requiring replacement (GRR) service line is found within our system, we will prepare an updated inventory and submit to the Maryland Department of the Environment and in

addition, the inventory will be made publicly available for water customers to view, and customers will be notified of any change in the service line material, if applicable.

For more information on our service line inventory please call 410-758-1180.

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 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 two (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.

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 some small amounts of 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 our customers. These improvements are sometimes reflected as rate structure adjustments. Thank you for your understanding.

Violation Lead and Copper Rule- FOLLOW UP OR ROUTINE TAP M/R (LCR)- Begin 9/30/2024 End 11/03/2024: We failed to comply with follow-up or routine tap monitoring requirements related to lead and copper.