EPA Maximum Contaminant Levels

Water US EPA Maximum contaminant level (MCL) — drinking water 10pg L-1... 

Table 8.8 EPA Maximum Contamination Levels (MCLs) for Drinking Water...

In 1990 there were 3 reports of the low level occurrence of benzene in beverages. Bottled mineral water was contaminated with benzene originated from an underground source of carbon dioxide which was inadequately carbon treated [23]. Two manufacturers found benzene in fmit flavoured mineral waters at levels greater than 5.0 pg/kg [24], The US EPA maximum contaminant level (MAE) for benzene is 0.005 mg/L [25] which is also the Canadian guideline as maximum acceptable concentration (MAC) in drinking water [26]. The manufacturers attributed the benzene to the presence of ascorbic acid and sodium benzoate in combination in their drink formations [27], omitting either of these additives eliminated the benzene. 

The primary sources of bacteria in water are human and animal wastes, seepage or discharge from septic tanks, sewage treatment facilities, and natural soil and plant bacteria. Pathogenic organisms can cause intestinal infections, dysentery, hepatitis, typhoid fever, cholera, and other illnesses. The EPA requires that aU public water suppliers regularly test for coliform bacteria and deliver water that meets the EPA standards. The EPA Maximum Contaminant Level (MCL) for coliform bacteria in drinking water is zero total cohforms per 100 mL of water (56). 

C. The US Environmental Protection Agency (EPA) Maximum Contaminant Level (MCL) in water is 5 ppb. 

The EPA maximum contaminant level for the amount of tetrachloroethylene that can be in drinking water is 0.005 milligrams tetrachloroethylene per liter of water (mg/L) (0.005 ppm). 

US EPA. Maximum contaminant level for mercury, http //water.epa.gov/drink/contaminants/ basicinformation/mercury.cfin [accessed on 20.05.15]. 

Legislated limits SUGGESTED in EXPERIMENTS Rats NOEL 300 797 800 ppm Rabbits NOEL 1,000 ppm Mice NOEL 1,000 ppm RECOMMENDED USEPA draft drinking water lifetime health advisory 20 to 200 /xg/L Drinking 0.2 mg/L and 50 /xg/L Groundwater 0.2 mg/L Odor threshold 680 /xg/L NOEL 100 mg/L EPA maximum contaminant level (MCL) 1,260 to 1,610 /ig/L No data available No data available No data available... 

TABLE 13.4 EPA Maximum Contaminant Level (MCL) for Several Dirty Dozen Chemicals... 

There is uncertainty as to what levels of MTBE in drinking water cause a risk to public health.9 U.S. EPA has issued an advisory suggesting that drinking water should not contain MTBE in concentrations >20-40 pg/L, based on taste and odor concerns, but has not issued a federal maximum contaminant level (MCL) for MTBE, which will be based on the ongoing U.S. EPA studies.1... 

According to EPA s National Compliance Report for calendar year 1996 (EPA 1998g), the vast majority of people in the nation received water from systems that had no reported violations of the maximum contaminant level and treatment technique requirements or significant monitoring and reporting requirements. Lead has a maximum permissible level of 15 pg/L delivered to any user of a public water system. Lead and copper are regulated in a treatment technique that requires systems to take tap water samples at sites with lead pipes or copper pipes that have lead solder and/or are served by lead service lines. The water system is required to take treatment steps if the action level (15 pg/L for lead) is exceeded in more than 10% of tap water samples. For calendar year 1996, nearly 6 million people in the United States were served by community water systems that reported maximum contaminant level and treatment technique violations of the Lead and Copper Rule (EPA 1998g). 

EPA OSW Criteria for Classification of Solid Waste Disposal Facilities and Practices Maximum contaminant levels (MCLs) 0.05 mg/L 40 CFR 257, App. I EPA 1993b... 

EPA ODW Maximum Contaminant Level Goals (MCLGs) for Inorganic contaminants 0 mg/L 40 CFR 141.51 EPA 1985g... 

EPA. 1991d. Maximum contaminant level goals and national primary drinking water regulations for lead and copper. Federal Register 56 26461-26564. 

In order to protect people from potential health effects, the EPA banned the production and use of endrin in the United States in 1986. The EPA s proposed maximum contaminant level (MCL) in drinking water is 0.0002 milligrams per liter (mg/L 1 mg/L = 1 ppm). The EPA has also set health advisories which are levels of a chemical in water that are safe. The 1-day and 10-day health advisories for endrin are 0.02 mg endrin per liter of water for both children and adults. 

National Revised Primary Drinking Wbter Regulations Maximum Contaminant Levels for Synthetic Organic Contaminants - Endrin 0.002 mg/L 40 CFR 141.61 EPA 1991a... 

Food Variances and Exemptions From the Maximum Contaminant Levels for Organic and Inorganic Chemicals NA 40 CFR 142.62 EPA 1976b... 

Maximum Contaminant Level Goal 0.002 mg/L 40CFR 141.50 EPA 1991a... 

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