Know Your Environment. Protect Your Health.

Manganese

King County Water District No 90

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20183.43 ppb441.60 ppb - 6.50 ppb
2019ND10ND
20203.12 ppb661.50 ppb - 5.30 ppb
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
2019-06-26ND
2020-02-10C0B1154-012.70 ppb
2020-02-10C0B1154-023.10 ppb
2020-05-05C0E0686-012.70 ppb
2020-08-04C0H0486-025.30 ppb
2020-08-04C0H0486-011.50 ppb
2020-11-04C0K0811-013.40 ppb