2019 Annual Water Quality Report for the City of Ecorse Water Supply Serial Number: 02050

2019 Annual Water Quality Report for the City of Ecorse Water Supply Serial Number: 02050

2019 Annual Water Quality Report for the City of Ecorse Water Supply Serial Number: 02050 The purpose of this report is to provide you with information about your drinking water. The report explains to you where your water comes from and the treatment it receives before it reaches your tap. The report also lists all the contaminants detected in your water and an explanation of all violations in the past year. This report covers the drinking water quality for the Contaminants and their presence in water: City of Ecorse for the 2019 calendar year. This Drinking water, including bottled water, may information is a snapshot of the quality of the water reasonably be expected to contain at least small that we provided to you in 2019. Included are details amounts of some contaminants. The presence of about where your water comes from, what it contains, contaminants does not necessarily indicate that water and how it compares to United States Environmental poses a health risk. More information about Protection Agency (U.S. EPA) and state standards. contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking The City of Ecorse receives its drinking water from the Water Hotline (800-426-4791) . Great Lakes Water Authority (GLWA), Southwest Treatment Plant, located in Allen Park. Water treated Vulnerability of sub-populations: Some people may at the plant is drawn from the Detroit River. The water be more vulnerable to contaminants in drinking water flows to the plants by gravity through a large water than the general population. Immuno-compromised tunnel. persons such as persons with cancer undergoing The treatment process begins with disinfecting the chemotherapy, persons who have undergone organ source water with chlorine to kill harmful transplants, people with HIV/AIDS or other immune microorganisms that can cause illness. Next, a systems disorders, some elderly, and infants can be chemical called Alum is mixed with the water to particularly at risk from infections. These people remove the fine particles that make the water cloudy should seek advice about drinking water from their or turbid. Alum causes the particles to clump together health care providers. U.S. EPA/Center for Disease and settle to the bottom. Fluoride is also added to Control guidelines on appropriate means to lessen the protect our teeth from cavities. risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe The water then flows through several sand filters to Drinking Water Hotline (800-426-4791) . remove even more particles and certain microorganisms that are resistant to chlorine. Finally, Contaminants that may be present in source water a small amount of phosphoric acid and chlorine are include: added. The phosphoric acid helps control the lead that • Microbial contaminants , such as viruses and may dissolve in the water from household plumbing bacteria, which may come from sewage treatment systems. The chlorine keeps the water disinfected as plants, septic systems, agricultural livestock it travels through the mains to your home. operations and wildlife. The sources of drinking water (both tap and bottled • Inorganic contaminants , such as salts and water) include rivers, lakes, streams, ponds, metals, which can be naturally-occurring or result reservoirs, springs, and wells. As water travels over from urban stormwater runoff, industrial or the surface of the land, or through the ground, it domestic wastewater discharges, oil and gas dissolves naturally occurring minerals and, in some production, mining or farming. cases, radioactive material, and can pick up • Pesticides and herbicides , which may come substances from the presences of animals or from from a variety of sources such as agriculture and human activity. residential uses. 1 • Radioactive contaminants , which can be naturally occurring or be the result of oil and gas production and mining activities. • Organic chemical contaminants , including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, In order to ensure that tap water is safe to drink, the urban stormwater runoff, and septic systems. U.S. EPA prescribes regulations that limit the levels of certain contaminants in water provided by public water systems. Federal Food and Drug Administration regulations establish limits for contaminants in bottled water which provide the same protection for public health. Drinking water quality is important to our community and the region . The City of Ecorse and the GLWA are committed to meeting state and federal water quality standards including the Lead and Copper Rule. With the Great Lakes as our water source and proven treatment technologies, the GLWA consistently delivers safe drinking water to our community. Ecorse operates the system of water mains that carry this water to your home’s service line. This years Water Quality Report highlights the performance of GLWA and Ecorse water professionals in delivering some of the nation’s best drinking water. Water Quality Data The table below lists all the drinking water contaminants that we detected during the 2019 calendar year. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. Unless otherwise noted, the data presented in this table is from testing done January 1 through December 31, 2019. The State allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. All the data is representative of the water quality, but some are more than one year old. Terms and abbreviations used below: • Maximum Contaminant Level Goal (MCLG): 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. • Maximum Contaminant Level (MCL): 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 Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants. • Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants. • N/A: Not applicable • ppb: parts per billion or micrograms per liter • ppm: parts per million or milligrams per liter • pCi/l: picocuries per liter (a measure of radioactivity). • Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow. 2 2019 Inorganic Chemicals – Monitoring at the Plant Finished Water Tap Level Range of Year Violation Regulated Contaminant MCL MCLG Typical Source of Contaminant Detected Detection Sampled Yes/No Discharge of drilling wastes; Discharge of metal Barium (ppm) 2 2 .01 n/a 5-16-17 no refineries; Erosion of natural deposits Runoff from fertilizer use; Leaching from septic Nitrate (ppm) 10 10 .99 n/a 6-11-19 no tanks, sewage; Erosion of natural deposits Erosion of natural deposits; Water additive which Fluoride (ppm) 4 4 .74 n/a 6-11-19 no promotes strong teeth; Discharge from fertilizer and aluminum factories 2019 Disinfection By-Products – Monitoring in Distribution System, Stage 2 Disinfection By-Products Allowed Highest Range of Year Violation Regulated Contaminant MCLG Typical Source of Contaminant Level MCL LRAA Detection Sampled Yes/No TTHM Total 80 N/A 17 0.50-80 2019 no Byproduct of drinking water disinfection Trihalomethanes (ppb) HAA5 Haloacetic Acids 60 N/A 9.5 0.50-60 2019 no Byproduct of drinking water disinfection (ppb) 2019 Disinfectant Residuals – Monitoring in Distribution System by Treatment Plant Quarterly Allowed Highest Year Violation Regulated Contaminant MRDLG Range of Typical Source of Contaminant Level MCL RAA Sampled Yes/No Detection Jan-Dec Chlorine (ppm) 4 4 0.60 0.49-0.69 no Water additive used to control microbes 2019 2019 Turbidity – Monitored every 4 hours at Plant Finished Water Highest Single Measurement Lowest Monthly % of Samples Meeting Violation Yes/No Typical Source of Contaminant Cannot Exceed 1NTU Turbidity Limit of 0.3 NTU (minimum 95%) 0.18 NTU 100% no Soil Runoff Turbidity is the measure of the cloudiness of water. We monitor it because it is a good indicator of the effectiveness of our filtration system. 2019 lead and Copper Monitoring at Customers’ Tap Action 90 th Number of Year Violation Regulated Contaminant MCLG Level Percentile Samples Typical Source of Contaminant Sampled Yes/No AL Value* over AL Corrosion of household plumbing system; Lead (ppb) 0 15 8.075 0 2019 no Erosion of natural deposits Corrosion of household plumbing system; Copper (ppm) 1.3 1.3 0.189 0 2019 no Erosion of natural deposits; Leaching from wood preservatives 3 * The 90 th percentile value means 90 percent of the homes tested have lead and copper levels below the given 90 th percentile value. If the 90 th percentile value is above the AL additional requirements must be met. Regulated Contaminant Treatment Technique 2019 Typical Source of Contaminant The Total Organic Carbon (TOC) removal ratio is calculated as the ratio between the actual TOC removal and the TOC removal requirements. Total organic Carbon (ppm) Erosion of natural deposits The TOC was measured each quarter and because the level was low, there is no TOC removal requirement Radionuclides 2014 Allowed Test Violation Regulated Contaminant MCLG Level Detected Typical Source of Contaminant Level Date Yes/No Combined Radium 226 and 0 5 0.65 + or – 0.54 5-13-14 no Erosion of natural deposits 228 (pCi/L) Contaminant MCLG MCL Level Detected 2019 Typical Source of Contaminant Sodium (ppm) n/a n/a 7.25 Erosion of natural deposits Unregulated Contaminant Monitoring Rule Unregulated contaminants are those for which the U.S.

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