CITY OF MASON CITY - Ad from 2023-05-25
Details for CITY OF MASON CITY - Ad from 2023-05-25
2022 WATER QUALITY REPORT FOR MASON CITY WATER DEPARTMENT This report contains essential information regarding the water quality in our water system. The source of our water is groundwater. Our water quality testing shows the following results: CONTAMINANT MCL - (MCLG) Compliance Type Value & (Range) Date Violation Source Yes/No Total Trihalomethanes (ppb) [TTHM] 80 (N/A) LRAA 5.00 (5 - 5) 06/30/2022 No By-products of drinking water chlorination Total Haloacetic Acids (ppb) [HAA5] 60 (N/A) LRAA 8.00 (8 - 8) 06/30/2022 No By-products of drinking water disinfection Total Haloacetic Acids (ppb) [HAA5] 60 (N/A) LRAA 8.00 (8 - 8) 06/30/2022 No By-products of drinking water disinfection Lead (ppb) AL=15 (0) 90th 7.40 (ND - 20) 1 sample(s) exceeded AL 2020 No Corrosion of household plumbing systems; erosion of natural deposits Copper (ppm) AL=1.3 (1.3) 90th 0.256 (0.0149 0.389) 2020 No Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives RAA 0.8 (0.13 - 1.19) 12/31/2022 No Water additive used to control microbes Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other waterborne pathogens may be present, or that a potential pathway exists through which contamination may enter the drinking water. 950 - DISTRIBUTION SYSTEM Chlorine (ppm) Total Coliform Bacteria MRDL=4.0 (MRDLG=4.0) TT (TT) RTCR 2 sample(s) positive 09/30/2022 No 1.04 09/22/2022 No Erosion of natural deposits 05 - WELLS A1, A3, 7, 8, 9, 10, 12, 14, 16-TREATED Combined Radium (pCi/L) 5 (0) SGL Barium (ppm) 2 (2) SGL 0.0082 04/21/2021 No Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits Fluoride (ppm) 4 (4) RAA .77 12/31/22 No Water additive which promotes strong teeth; Erosion of natural deposits; Discharge from fertilizer and aluminum factories Sodium (ppm) N/A (N/A) SGL 31.1 04/21/2021 No Erosion of natural deposits; Added to water during treatment process Note: Contaminants with dates indicate results from the most recent testing done in accordance with regulations. DEFINITIONS • 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 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. • ppb -- parts per billion. • ppm -- parts per million. • pCi/L – picocuries per liter • N/A – Not applicable • ND -- Not detected • RAA – Running Annual Average • Treatment Technique (TT) – A required process intended to reduce the level of a contaminant in drinking water. • Action Level (AL) – The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. • 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. • 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. • SGL – Single Sample Result • RTCR – Revised Total Coliform Rule • NTU – Nephelometric Turbidity Units GENERAL INFORMATION 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 water posed a health risk. More information about contaminants or potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline (800-426-4791). 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 microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791). 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. MASON CITY WATER DEPARTMENT 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 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 Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead. COLIFORM ASSESSMENT During the past year we were required to conduct 1 Level 1 assessment and 1 Level 2 assessment to determine the cause of bacteria in our distribution system. Corrective actions have been or will be taken to address these issues. If a health concern is present, you will be notified. A Level 1 Assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system. A Level 2 Assessment is a detailed study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system on multiple occasions. SOURCE WATER ASSESSMENT INFORMATION This water supply obtains its water from the sandstone and dolomite of the Cambrian-Ordovician aquifer. The Cambrian-Ordovician aquifer was determined to be susceptible to contamination because the characteristics of the aquifer and overlying materials provide some protection from contaminants from the land surface. The Cambrian-Ordovician wells will be susceptible to surface contaminants such as leaking underground storage tanks, contaminant spills, and excess fertilizer application. A detailed evaluation of your source water was completed by the Iowa Department of Natural Resources and is available from the Water Operator at 641-421-3683. CONTACT INFORMATION For questions regarding this information or how you can get involved in decisions regarding the water system, please contact MASON CITY WATER DEPARTMENT at 641-421-3683.