Customer Service
1-800-544-3533
Hello Guest, Login

Emerging Contaminants


NSF Establishes New Standard
NSF/ANSI-401 Standard For Reducing Emerging Contaminants
 
You may have seen reports recently about the presence of emerging or incidental contaminants in drinking water. According to NSF, 82 percent of consumers report that they are concerned about the negative effects these emerging contaminants may have on their health although at trace levels they are not a public health issue. Contaminants of most concern include pesticides and herbicides followed by prescription drugs, over-the-counter drugs, chemicals used as flame retardants and detergents. 

  What Are Emerging Contaminants? 
 Most contaminants found in drinking water have traditionally fallen into one of two categories — health effects, for contaminants known to adversely affect health when present in drinking water; or aesthetic effects, for contaminants not affecting health but rather the taste, appearance or odor of drinking water. 
 Emerging contaminants are a new category of water quality concerns for which evidence of health effects has not yet been established due in part to the trace levels at which these compounds are currently being detected. For this reason, it was decided that a separate testing standard should be developed for product testing purposes.

American National Standard NSF/ANSI 401 
 NSF/ANSI 401: Emerging Contaminants/Incidental Compounds is an American national standard that verifies the ability of a water treatment device to reduce up to 15 of the emerging contaminants shown below. This list includes some prescription/OTC drugs, new types of herbicides and pesticides and chemicals used as flame retardants and detergents that have been found at trace levels in drinking water.

Substance

Average influent

challenge ng/L*

Maximum effluent

concentration ng/L*

Meprobamate

400 ± 20%

60

Phenytoin

200 ± 20%

30

Atenolol

200 ± 20%

30

Carbamazepine

1,400 ± 20%

200

TCEP

5,000 ± 20%

700

TCPP

5,000 ± 20%

700

DEET

1,400 ± 20%

200

Metolachlor

1,400 ± 20%

200

Trimethoprim

140 ± 20%

20

Ibuprofen

400 ± 20%

60

Naproxen

140 ± 20%

20

Estrone

140 ± 20%

20

Bisphenol A

2,000 ± 20%

300

Linuron

140 ± 20%

20

Nonyl phenol

1,400 ± 20%

200


*While a majority of regulated contaminants like arsenic and lead are measured either in milligrams or micrograms per liter, many contaminants covered by NSF/ANSI 401 are only found in trace amounts and thus are measured in a smaller increment known as nanograms per liter (ng/L). To put this in perspective, 1 ng/L is the equivalent of 1/1000th of a microgram per liter, which would be the same as 1 ounce in 7.5 billion gallons of water. 
Above information from nsf.org 


  BACKGROUND INFORMATION ON NSF INTERNATIONAL
With a mission to protect and improve human health globally, NSF is an independent accredited organization that tests and certifies a product to ensure that it meets the regulatory requirements necessary by the United States as well as testing requirements for many other countries. The NSF water certification is used as a mark of distinction for consumers to have knowledge that the product they are using is able to safely and effectively remove contaminants from drinking water. Previously, contaminants were separated into two separate categories, NSF 42 and NSF 53. However, with the concern for emerging contaminants, a third category has been added NSF 401. NSF 401 requires a separate testing standard for testing of emerging contaminants.




                               
Menu
Information