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EWG's Tap Water Database — 2019 UPDATE

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Selenium

Northampton Bucks County Municipal Authority

Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.08 ppb15151.50 ppb - 4.00 ppb
2013N/A00N/A
2014N/A00N/A
20150.360 ppb151ND - 5.40 ppb
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 30 ppb

The EWG Health Guideline of 30 ppb for selenium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hair loss and nail damage.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The legal limit for selenium, established in 1991, was based on human epidemiological studies of populations exposed to naturally occurring selenium in drinking water. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2012-10-17L4361807-22.00 ppb
2012-10-17L4361807-11.80 ppb
2012-10-17L4361807-122.50 ppb
2012-10-17L4361807-141.90 ppb
2012-10-17L4361807-131.50 ppb
2012-10-17L4361807-64.00 ppb
2012-10-17L4361807-51.60 ppb
2012-10-17L4361807-102.20 ppb
2012-10-17L4361807-112.10 ppb
2012-10-17L4361807-92.10 ppb
2012-10-17L4361807-81.90 ppb
2012-10-17L4361807-71.80 ppb
2012-10-17L4361807-42.00 ppb
2012-10-17L4361807-31.80 ppb
2012-12-14L4422964-22.00 ppb
2015-08-2413124478ND
2015-08-2413124502ND
2015-08-2413124490ND
2015-08-24131245625.40 ppb
2015-08-2413124550ND
2015-08-2413124466ND
2015-08-2413124442ND
2015-08-2413124454ND
2015-08-2413124598ND
2015-08-2413124586ND
2015-08-2413124574ND
2015-08-2413124538ND
2015-08-2413124526ND
2015-08-2413124514ND
2015-08-2413124430ND