2023 - Consumer Confidence Report

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 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 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 onein-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 humanmade chemicals that have been used since the 1940s in a range of products, including stain- and waterresistant 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 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.

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.