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My state has a maximum contaminant level (MCL) of 0.0005 mg/L for chlordane in drinking water, but the federal standard is 0.002 mg/L. Why does the state have a different standard?
Is the risk of getting cancer the same for both short-term and long-term radionuclide exposure through drinking water?
Is there a difference between E.Coli and fecal coliforms?
Is there an ongoing assessment of the nitrate NPDWR standard? The March 2010 6-year review (http://water.epa.gov/lawsregs/rulesregs/regulatingcontaminants/sixyearreview/second_review/index.cfm#summary) lists nitrate as either having a health effects asses
Should I be concerned about the high levels of chlorine in my community's swimming pool? Is it safe for my children to swim in the water?
The maximum contaminant level (MCL) for total coliform is based on its presence or absence in a water sample (40 CFR 141.63(a)). Why is the total coliform MCL based on presence or absence rather than an estimation of coliform density?
Should my children stop brushing their teeth with fluoride toothpaste?
The maximum contaminant level (MCL) for asbestos (fibers greater than 10 micrometers in length) is 7 million fibers per liter (MFL). What are common sources of asbestos in drinking water?
What are the chances Perchlorate is in my drinking water?
What are the constituents of the total trihalomethanes (TTHMs) group and what is the maximum contaminant level (MCL) and maximum contaminant level goal (MCLG) for this contaminant group?
What are the effects of excess levels of fluoride and why are they different for children and adults?
The Secondary Maximum Contaminant Level (SMCL) for aluminum indicates an acceptable range between 0.05 mg/l - 0.20mg/l. Why did EPA develop a range for this secondary contaminant, rather than a specific acceptable level?
What are the drinking water standards for fluoride? What do you mean by an MCL, an MCLG, and a secondary standard for fluoride? What is the difference?
What can I do to limit my exposure to fluoride?
What are the federally-enforced standards for Radon in Drinking Water?
What are the five constituents of the haloacetic acids (HAA5) group and what is the maximum contaminant level (MCL) and maximum contaminant level goal (MCLG) for this group of constituents?
What are total coliform bacteria?
What does EPA set as a safe level for MTBE?
What is bromate? How does it get into my drinking water? What are its associated health risks?
What does the presence of total coliform bacteria in drinking water indicate?
What does the section on cryptosporidium mean in my CCR? Do we have it in our water? Does this mean I am immunocompromised? What should I do?
What is hardness in water? How does it affect my drinking water?
What is radon?
What is the current drinking water standard for fluoride?
What is methyl-t-butyl ether MTBE? How does it contaminate a water supply?
What is the difference between pH and alkalinity?
What is the federal standard for chloride in drinking water?
What is the federal standard for pH in drinking water?
What is the federal standard for total dissolved solids (TDS) in drinking water?
What is the most common form of chlorine used to disinfect drinking water at drinking water treatment plants?