Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. If the odor is not from the sink or the problem persists, contact the Cambridge Water Laboratory at 617-349-4780. If you experience rapid disintegration of o-rings and gaskets (within one to two years of installation), contact the manufacturer to request plumbing fixtures that are resistant to chloramine. One form, hexavalent chromium, causes cancer. Galvanized steel pipes rust on the inside, causing the drinking water to have a yellow, red, or brown tint. Water from the Ware River can also be added to the drinking water supply if needed. It is likely that these low-level compounds have been present in our water for as long as humans have been using them. Black particles can also come from precipitated iron and manganese in water, which may come loose from pipe walls after a large main break or major construction. The Lead and Copper Rule. Hardness also varies slightly by seasons of the year. Flushing the system and your taps will likely resolve the issue of black particles caused by plumbing fixtures or construction. First, we ask to run you water for 5 minutes. NOTICE: The Cambridge Water Department will be open to members of the public, by appointment only, Tuesday and Thursday from 9:00 a.m. to 2:00 p.m., for various services.Details about Residential Water Testing, Water Construction Permits, Hydrant Use Permits, Backflow Permits and Water Meter Replacement are available on our website. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer. complied with health-based drinking water standards. EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Maryland Department of the Environment, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). Chlorate impairs thyroid function, making chlorate exposure most harmful during pregnancy and childhood. NOTICE: The Cambridge Water Department will be open to members of the public, by appointment only, Tuesday and Thursday from 9:00 a.m. to 2:00 p.m., for various services.Details about Residential Water Testing, Water Construction Permits, Hydrant Use Permits, Backflow Permits and Water Meter Replacement are available on our website. DCR's Division of Water Supply Protection, Office of Watershed Management (DWSP) manages and protects the the Quabbin Reservoir, Ware River, Wachusett Reservoir, and Sudbury Reservoir watersheds, the source drinking water supply for 3 million people. Installing more drinking fountains will provide Cambridge residents with access to free drinking water as they pass through parks. For more information about fluoride, visit the EPA website. If the problem continues after flushing and you have determined that the source is not a rubber gasket or filter, please contact the Cambridge Water Laboratory at 617-349-4780. Records of water quantity, water quality, and meteorological parameters were continuously collected from three reservoirs, two primary streams, and four subbasin tributaries in the Cambridge, Massachusetts, drinking-water source area during water year … CWD adds fluoride to the drinking water supplied to Cambridge to meet an optimal level of 1.0 milligrams per liter (mg/L). Tap water in Boston comes from Quabbin Reservoir and is safe to drink unless you are in an old decrepit building with rusted pipes. Includes chemicals detected in 2015-2017 for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority; chemicals detected under the EPA's Unregulated Contaminant Monitoring Rule (UCMR 3) program in 2013 to 2015 (and subsequent testing when available), for which annual utility averages were lower than an EWG-selected health guideline established by a federal or state public health authority. Tap Water and Fish - PDF. If you have filters attached to your plumbing system or a water pitcher that uses carbon filters to remove contaminants, these can also contribute to the presence of black particles. From April 2016 to March 2019, Cambridge Water Department (MWRA) complied with health-based drinking water standards. CWD regularly tests the fluoride levels in the distribution system and in the water produced by the water treatment plant. The U.S. Environmental Protection Agency (EPA) regulates the safe use of chloramine and requires the CWD to meet strict health standards when chloramine is used for drinking water disinfection. The Lead and Copper Rule is a federal regulation implemented by the US EPA and state environmental agencies. Information in this section on Cambridge Water Department (MWRA) comes from the U.S. EPA Enforcement and Compliance History Online database (ECHO). Check out our recommendations for filters to protect your water against the detected contaminants. This health guideline protects against harm to the brain and nervous system. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people. drinkable definition: 1. clean and safe to drink: 2. pleasant tasting: 3. clean and safe to drink: . The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. If black particles are from your filter, you should replace the filter as recommended by the manufacturer. When crews flush hydrants and remove this material from the hydrant and several miles of pipe, it comes out of a hydrant all at once, and the water may initially look discolored. Click here to read more about nitrate. As a result, the Environmental Protection Agency (EPA) enforces regulatory limits for two groups of DBPs linked to health risks, known as total trihalomethanes (TTHM) and five haloacetic acids (HAA5). results of tests conducted by the water utility and provided to the Environmental Working Group by the Massachusetts Department of Environmental Protection, as well as If the water clears from the bottom to the top of the container, air bubbles are rising to the surface. The best way to ensure clean tap water is to keep pollution out of source water in the first place. Presently the Massachusetts Department of Public Health (MDPH) has not adopted this recommendation. When water stands for several hours in lead pipes or lead plumbing fixtures, lead may dissolve in drinking water. Reprint Permission Information. For more information on PPCPs visit the EPA Pharmaceuticals and Personal Care Products page. Dissolved calcium is naturally found in our drinking water and can naturally change to calcium carbonate in hot water heaters. Discoloration from iron is usually temporary and should disappear after water is flushed from the distribution system or your home plumbing. Then let the water stand Watershed Management . tap water in boston (Cambridge, Brookline: purchase, live in, safe) User Name: Remember Me: Password ... MA. Although CWD has an aggressive program to eliminate lead service lines there are some still in use and can usually be found in pre-world war II single or small multifamily residences. The Cambridge Water Department offers to test Cambridge residents’ tap water for lead; free of charge. Getting a passing grade from the federal government does not mean the water meets the latest health guidelines. • Draw water for drinking or cooking after flushing your cold tap for at least two minutes or after another high-water-use activity such as bathing or washing clothes. Click here to read more about disinfection byproducts. Factors Affecting Reservoir and Stream-Water Quality in the Cambridge, Massachusetts, Drinking-Water Source Area and Implications for Source-Water Protection By MARCUS C. WALDRON and GARDNER C. BENT Water-Resources Investigations Report 00-4262 Prepared in cooperation with the CITY OF CAMBRIDGE, MASSACHUSETTS, WATER DEPARTMENT Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Many homes and schools have galvanized steel drinking water pipes, and/or lead solder to join the pipes. Commercial products are available to remove white residue caused by minerals in water. These minerals are not a risk to human health but can build up on surfaces over time. Bottled Water in Cambridge on YP.com. Our systems are backed by a Limited Lifetime Warranty & 100% Satisfaction Guarantee!! If you are experiencing a polypropylene problem, call the manufacturer of your hot water heater. The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2015-2017. SOMERVILLE, MA — As the temperatures stretch above the 80s in Somerville folks are drinking a lot more water. If you experience a chlorine taste, we recommend collecting and refrigerating cold water after running your cold tap for at least two minutes or after another high water use activity such as bathing or washing clothes. Nitrite is significantly more toxic than nitrate. It can occur naturally in groundwater, and oil and gas extraction activities such as hydraulic fracturing can elevate concentrations. MWRA treats the water at the John J. Carroll Treatment Plant with sodium carbonate (soda ash) and CO2 (carbon dioxide) to increase the pH and buffering capacity of the water. Learn more. After obtaining your Lead Sampling Kit follow these easy instructions: Sam-ples are to be collected from a tap in the residence that is used for drinking water purposes. Read more about chromium (hexavalent). According to the U.S. Environmental Protection Agency, a MCL is the "highest level of a contaminant that is allowed in drinking water. You may not copy, reproduce, republish or distribute information from EWG’s Tap Water Database without EWG’s prior written permission. The optimal level for fluoride is intended to prevent tooth decay and protect public health. During water main breaks or construction, interruption of normal water flow and disturbance of pipe walls may release the iron scale and cause discoloration. If no bubbling occurs or the particle does not dissolve, it is likely polypropylene. Information in this section on Cambridge Water Department (MWRA) comes from the U.S. EPA Enforcement and Compliance History Online database (ECHO). From April 2016 to March 2019, Cambridge Water Department (MWRA) Tap Water vs Bottled Water . If you watch our workers flush, you will notice that the water clears up rather quickly. Yes it is very safe - Boston has the cleanest urban drinking water in the entire country. Lead enters the water from the corrosion of materials containing lead. To date, lead concentrations are below EPA's action level of less than or equal to 15 parts per billion. What is the maximum contaminant level (MCL) and maximum contaminant level goal (MCLG)? Aerator screens can collect particles found in water and should be routinely cleaned throughout the year and replaced once a year. Consequently, when the cold water enters your building and begins to warm, the oxygen bubbles escape and cause the water to look milky. However, at times customers may notice an increase in chlorine taste and odor. If you are experiencing a chlorine odor, CWD recommends flushing your cold water taps for 5-10 minutes for three days to eliminate the odor and remove any bacteria and debris. This would particularly impact people who regularly spend time at parks, including young children and their caretakers, the elderly, joggers, and the homeless. For the latest quarter assessed by the U.S. EPA (January 2019 - March 2019), tap water provided by this water utility was in compliance with federal health-based drinking water standards. The Cambridge Water Department offers free tap water testing for lead and copper to Cambridge residents. Plumbing gaskets and o-rings disintegrate over time and can collect in toilet tanks and around faucets. Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. You can test this by running the water into a clear container and observing for a few minutes. This health guideline protects against hormone disruption. We recommend pouring bleach or a disinfection product down your drain to remove any debris and odor. Within a few hours, the chlorine taste and odor will disappear and the water will be conveniently cold for drinking. Despite these seemingly alarming stats, the Natural Resources Defense Council (NRDC), which has also conducted extensive tests on municipal water supplies as well as bottled water, says: “In the short term, if you are an adult with no special health conditions, and you are not pregnant, then you can drink most cities’ tap water without having to worry.” CWD routinely monitors the chloramine and chlorine levels throughout the water distribution system. Environmental Working Group is a 501(c)(3) nonprofit corporation, EIN 52-2148600. Appointments can be made by phone at 617-349-4770 or by … Contact your local pet store for the appropriate water treatment for fish tanks. The common cause of black particles in tap water is the disintegration of rubber materials used in plumbing fixtures. Find Drinking Water Operator jobs in Cambridge, MA. Chloramine is a disinfectant used to treat drinking water and formed when ammonia is added to chlorine. The drinking water supply system (United States Geological Survey above figure) consists of the Hobbs Brook Reservoir (upper reservoir) and Stony Brook Reservoir (middle reservoir) which drains a 24 square mile basin in Lexington, Lincoln Waltham and Weston, MA, and Fresh Pond (terminal reservoir), a glacial kettle-hole lake located in Cambridge. Legal limits for contaminants in tap water have not been updated in almost 20 years. Lead-Sampling kits are available at the Cambridge Water Department by calling 617 349-4780. Two samples are to be collected from the same tap (kitchen, bathroom etc.) Disinfection byproducts (DBPs) form when chlorine and other disinfectants react with naturally occurring materials in Cambridge's surface water supply reservoirs. Click here to read more about disinfection byproducts. Call the Water Quality Laboratory at 617-349-3480, if no answer please leave a message or. Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. According to the U.S. EPA, "Some people who drink water containing fluoride in excess of the MCL over many years could get bone disease, including pain and tenderness of the bones. Lead in Boston’s Drinking Water. Drinking tap water would also help with reducing … Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water. Should you be buying more bottled water? Exceeding an action level requires specific changes to drinking water treatment to reduce pipe corrosion or other requirements that a water system must follow. Please contact your physician or kidney dialysis center for the appropriate water treatment process. For additional information and updated water quality results for chlorine, please see Water Department Annual Drinking Water Quality report. In addition, the use of chloramine as a disinfectant is known to cause rapid disintegration of some types of plumbing fixtures. The EPA sets the Lead and Copper Action Level. Environmental Working Group. Appointments can be made by phone at 617-349-4770 or by … Low levels of pharmaceuticals and other compounds found in parts per trillion are below levels known to harm human health. Two samples are to be collected using containers provided by the Water Department. The federal government’s legal limits are not health-protective. CWD disinfects the drinking water with chlorine and chloramine to ensure protection against contaminants throughout the distribution system and in your home. An odor from your tap is commonly from the sink drain and not the water. The EWG Health Guideline of 210 ppb for chlorate was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. Barium is a mineral present in rocks, soil and water. Human, animal, agricultural, and other activities can affect the reservoir system. Using a high quality dishwasher detergent with a rinse agent will solve this problem. The range of CWD's fluoride results from the water treatment plants is included in CWD's Annual Drinking Water Quality Reports. Radioactive strontium-90 can cause bone cancer and leukemia, and any form of strontium at high doses can harm bone health. The Cambridge Water Department (CWD), uses ozone and chlorine as primary disinfectants and chloramine as a secondary disinfectant. For additional information, contact the Cambridge Water Laboratory at 617-349-4780. Click here to read more about disinfection byproducts. When water from the water treatment plant enters the distribution system, chloramine provides protection against contaminants as it moves through the mains in the streets and reaches your taps. Cloudiness and air bubbles do not present a health risk. The EWG Health Guideline of 1,500 ppb for strontium was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. using containers provided . In the past, HHS supported a fluoride level between 0.7 to 1.2 mg/L, as safe and effective in preventing tooth decay. For additional information and updated water quality results for DBPs, please see CWD's Annual Drinking Water Quality Report. Chlorate forms in drinking water as a byproduct of disinfection. For information about licensing EWG data and analyses, contact TWDrequests[at]ewg.org. See reviews, photos, directions, phone numbers and more for the best Water Companies-Bottled, Bulk, Etc in Cambridge, MA. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people. Everyone consuming tap water in Cambridge gets their water from the same source. MCLs are set as close to the MCLGs as feasible using the best available treatment technology." Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. CWD's fluoride data is available in the Water Quality Reports section. Copyright © 2020. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Directly flushing pharmaceuticals also adds to its presence in the source water. TTHM is a contaminant group that includes bromodichloromethane, bromoform, chloroform and dibromochloromethane. instructions for draining your hot water heater. Pharmaceuticals found in water are prescription drugs or over-the-counter drugs used by humans and animals. Cambridge water has its own unique fingerprint that is clearly identifiable from all other water. These two reservoirs combined supply 200 million gallons of water on a daily basis. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. For more information about chloramine, please visit the EPA Web site. Learn how to test water, ... You can also contact the Cambridge Water Department at 617 349-4780 and ask for this information. Milky or cloudy water is often caused by air that enters pipes and escapes in the form of oxygen bubbles when water leaves your tap. The Massachusetts Drinking Water Regulations, 310 CMR 22.00. A chlorine odor is often an indicator that the disinfectant is effectively working to remove bacteria and debris in your pipes. It wasn’t always this way though. During colder months, water in outside pipes is colder and holds more oxygen than your household pipes. This health guideline protects against cancer. The most common source of build up in aerators is from the hot water heater. With clean water flowing again in Greater Boston, officials began investigating the cause of the pipe rupture that left up to 2 million people without drinkable tap water for 59 hours. Particle build up is often white and comes from a variety of sources. Cloudiness and air bubbles should naturally disappear in a few minutes. If you are experiencing a calcium carbonate problem, we recommend flushing the hot water heater. The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. When using dishwashers, you may notice a slight increase in "spotting" on glassware, flatware or white residue in kitchenware and showers. These regulations protect public water supply sources in Massachusetts. 2,476 posts, read 3,825,239 times Reputation: 2727. Appointments can be made by phone at 617-349-4770 or by … After obtaining your Lead Sampling Kit follow these easy instructions: Samples are to be collected from a tap in the residence that is used for The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. This residue consists mainly of calcium carbonate, the same ingredient found in anti-acid products and not a known health risk. This health guideline protects against cancer and harm to fetal growth and development. One of the best ways to push for cleaner water is to hold accountable the elected officials who have a say in water quality – from city hall and the state legislature to Congress all the way to the Oval Office – by asking questions and demanding answers. The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. If your water is brownish or rusty in color, the cause is likely iron. The state and national averages were calculated using the averages of the contaminant measurements for each utility in 2012-2017. Bromide is a naturally occurring element found in surface waters and groundwater. Lead solder can leach lead into the water. CWD routinely collects and analyzes samples throughout the city to ensure chlorine levels are at or below our stringent target level. Cambridge's water comes from the Quabbin Reservoir, about 65 miles west of Boston, and the Wachusett Reservoir, about 35 miles west of Boston. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform. This plastic can break apart or disintegrate and travel in hot water to your faucet, eventually collecting in the aerator. -Tap water in MA is quite drinkable; I've lived here for over 30 years, drinking it. Privacy Policy | The EWG Health Guideline of 700 ppb for barium was defined by EWG as benchmark that protects against harm to the kidneys and the cardiovascular system. Manganese is a naturally occurring element that is common in food and drinking water. Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. If you smell an odor, fill a clean glass halfway with tap water and smell the water in a separate room or outdoors. If the cloudiness does not disappear, contact the Distribution Division at 617-349-4770. pH adjustment works by creating a thin protective mineral coating inside pipes and plumbing fixtures to prevent water from corroding pipes, thus reducing the presence of lead. I think you will be fine. Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. Contaminants detected between 2012 and 2014 and were not part of EPA's UCMR-3 testing program or radiologicals: Chemicals tested for but not detected from 2012 to 2017: 1,1-Dichloroethane, 1,2,3-Trichloropropane, 1,2-Dibromo-3-chloropropane (DBCP), 1,3-Butadiene, 1,4-Dioxane, 17-beta-Estradiol, 2,4,5-TP (Silvex), 2,4-D, 3-Hydroxycarbofuran, 4-Androstene-3,17-dione, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Aluminum, Antimony, Arsenic, Atrazine, Benzo[a]pyrene, Beryllium, Bromate, Bromochloromethane, Bromomethane, Butachlor, Cadmium, Carbaryl, Carbofuran, Chlordane, Chlorodifluoromethane, Chloromethane, Cobalt, Cyanide, Dalapon, Di(2-ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Dicamba, Dieldrin, Dinoseb, Endrin, Equilin, Estriol, Estrone, Ethinyl estradiol, Ethylene dibromide, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorocyclopentadiene, Lindane, Mercury (inorganic), Methomyl, Methoxychlor, Metolachlor, Metribuzin, Molybdenum, Oxamyl (Vydate), Pentachlorophenol, Perfluorobutane sulfonate (PFBS), Perfluoroheptanoic acid (PFHPA), Perfluorohexane sulfonate (PFHXS), Perfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA), Picloram, Polychlorinated biphenyls (PCBs), Propachlor, Selenium, Silver, Simazine, Testosterone, Thallium, Toxaphene, Vanadium. Sources Of Drinking Water in Cambridge, Massachusetts Where does Cambridge get its water from? Lead service lines that connect your house to the mains in the street, other sources of lead like lead-based solder (pre-1986) used to join copper pipe, and brass and chrome-plated brass faucets in your home can wear away over time and release lead. Cambridge residents can bring unused prescription drugs to the Police Department at 125 Sixth Street or to the Hazardous Waste Collection Days listed on the Public Works Website. In addition, personal care products (fragrances, cosmetics, lotions, and other compounds) and the broad range of substances we use daily can enter the environment and eventually find its way into Cambridge's surface water supply reservoirs, our source water that is treated and used for drinking in Cambridge. EWG’s Tap Water Database is provided solely for your personal, non-commercial use. The CCR is also posted on the Cambridge Water Department’s Website. Contact Us | Strontium is a metal that accumulates in the bones. Chemical additives are available for removing chloramine from water used in fish tanks or ponds. Click here to read more about disinfection byproducts. The United States Environmental Protection Agency's (US EPA) maximum contaminant level (MCL) and maximum contaminant level goal (MCLG) for fluoride is 4 mg/L. Water hardness refers to the mineral content of water, commonly calcium and magnesium. Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Use clean, sterile (dishwasher-safe) bottles or pitchers for collecting cold tap water and refrigerate in an open container. This health guideline protects against harm to bones. This long-lasting protection is greater than chlorine, which is important for large distribution systems such as Cambridge's, which contains more than 190 miles of pipe for distributing drinking water. Aerators are strainers that attach to your faucet or shower head and break up the flow of water as it leaves your tap. Fluoride in drinking water at half the MCL or more may cause mottling of children's teeth, usually in children less than nine years old. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. The U.S. Environmental Protection Agency (EPA) requires that water treatment plants ensure treated water does not corrode pipes. The current level of fluoride recommended by MDPH is 0.9 to 1.2 mg/L. Drinking Water: Hard Water Hard water isn’t a health hazard but can be a nuisance within the home. But how safe is the water from the tap? NOTICE: The Cambridge Water Department will be open to members of the public, by appointment only, Tuesday and Thursday from 9:00 a.m. to 2:00 p.m., for various services.Details about Residential Water Testing, Water Construction Permits, Hydrant Use Permits, Backflow Permits and Water Meter Replacement are available on our website. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people. Pharmaceuticals, personal care products, and other compounds are found at extremely low levels in water. The EPA has not set a new tap water standard in almost 20 years, and some standards are more than 40 years old. NOTICE: The Cambridge Water Department will be open to members of the public, by appointment only, Tuesday and Thursday from 9:00 a.m. to 2:00 p.m., for various services.Details about Residential Water Testing, Water Construction Permits, Hydrant Use Permits, Backflow Permits and Water Meter Replacement are available on our website. Contaminants found in water can cause oxygen deprivation in infants and increase the risk of cancer Privacy |. Dbp levels and comply with EPA 's strict standards with Boston, refers to the water meets the health! That our drinking water treatment plants ensure treated water does not corrode pipes disinfectant used to treat drinking pipes. Dishwasher-Safe ) bottles or pitchers for collecting cold tap water standard in cambridge ma tap water drinkable years. Debris over time MCLG ) MDPH is 0.9 to 1.2 mg/L, as safe effective... ( MCLG ) ice cubes made with tap water and refrigerate in an open container, commonly calcium magnesium. 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