Know Your Environment. Protect Your Health.

Manganese

King County Water District #20

Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

 

4

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.53 ppb441.49 ppb - 4.57 ppb
20191.28 ppb54ND - 2.70 ppb
2020N/A00N/A
2021N/A00N/A
20220.500 ppb110.500 ppb
20230.600 ppb110.600 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 100 ppb

The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-081036223-20018R4.57 ppb
2018-04-0210478992.16 ppb
2018-07-0910663121.49 ppb
2018-10-1010866161.90 ppb