Know Your Environment. Protect Your Health.

Manganese

City of Tacoma

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201837.8 ppb2214.8 ppb - 60.8 ppb
201916.0 ppb771.000 ppb - 40.0 ppb
20205.26 ppb43ND - 14.0 ppb
202116.7 ppb62ND - 81.0 ppb
20222.63 ppb81ND - 21.0 ppb
202323.0 ppb53ND - 82.0 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
2018-07-2560.8 ppb
2018-10-1814.8 ppb
2019-06-172019061803201.20 ppb
2019-06-1820190620011323.0 ppb
2019-07-0820190709049340.0 ppb
2019-10-1420191015029522.0 ppb
2019-11-182019111903271.000 ppb
2019-11-192019112003325.50 ppb
2019-12-0519.0 ppb
2020-02-112020021201346.30 ppb
2020-04-0620200407021514.0 ppb
2020-07-072020070802570.720 ppb
2020-12-07202012080075ND
2021-06-214136297ND
2021-06-214136298ND
2021-06-214136300ND
2021-06-214136296ND
2021-06-30414341381.0 ppb
2021-07-21415932519.0 ppb
2022-09-154371197ND
2022-10-11437188921.0 ppb
2022-11-154384533ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2023-06-204470402ND
2023-07-124499687ND
2023-07-12449968920.0 ppb
2023-07-12449124482.0 ppb
2023-10-20454913713.0 ppb