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— Choose a Frequently Asked Question (FAQ) —
 
451.-

What is the acceptable cancer risk that EPA sets for most chemical contaminants in drinking water?

452.-

What is the analytical definition of water hardness?

453.-

What is the average daily intake of molybdenum (Mo) in drinking water in the United States?

454.-

What is the basis of the drinking water health advisory level of 15 ug/L for perchlorate issued by EPA in January of 2009?

455.-

What is the best type of filter to remove chlorine from my drinking water?

456.-

What is the bromate standard for water utilities that use ozonation to disinfect their drinking water supply?

457.-

What is the correct terminology for chemicals that exhibit hormonal activity?

458.-

What is the desired pH and ideal aluminum concentration to give good aluminum hydroxide flocculation during drinking water treatment but prevent alum carry over into a water distribution system?

459.-

What is the difference between chloroform and coliform?

460.-

What is the difference between direct and indirect additives to drinking water?

461.-

What is the difference between endocrine disruptors and hormonally active agents (HAA)?

462.-

What is the difference between hard and soft water?

463.-

What is the difference between suspended and dissolved contaminants in water?

464.-

What is the difference in apparent color and true color in water being treated for potable uses?

465.-

What is the difference in natural organic matter (NOM), total organic carbon (TOC) and dissolved organic carbon (DOC) in water?

466.-

What is the difference in temporary and permanent hardness in water?

467.-

What is the Drinking Water Contaminant Candidate List (CCL)?

468.-

What is the health concern with excess nitrate in drinking water?

469.-

What is the highest level of naturally occurring soluble arsenic that has been found in ground water wells in the United States?

470.-

What is the maximum chlorine residual that you would expect to find in your water supplied by a community water system?

471.-

What is the most common inorganic contaminant derived from human-made sources found in private wells located near intensively farmed land?

472.-

What is the most common source of sodium contamination in surface drinking water sources?

473.-

What is the most likely reason for chlorine residual in a public water system to exceed the disinfectants standard of 4.0 mg/L?

474.-

What is the normal range of soluble iron in surface and ground water?

475.-

What is the phthalate production today?

476.-

What is the preferred method for oxidation removal of manganese from a surface water source that contains significant levels of total organic carbon (TOC)?

477.-

What is the preferred method for tannin removal from water?

478.-

What is the preferred method of removing the odor causing chemicals of geosmin and 2-methylisoborneol (MIB) from surface drinking water supplies?

479.-

What is the primary health concern for perchlorate in the human diet?

480.-

What is the primary health risk for aluminum in drinking water?

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This website was developed by the ACES Water Quality Team, under the leadership of Dr. James E. Hairston. It is funded, in part, by USDA-CSREES water quality grant support under Section 406 of the Agricultural Research, Extension and Education Reform Act of 1998.