Know Your Environment. Protect Your Health.

Manganese

Harris County Water Control and Improvement District 114

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20194.00 ppb114.00 ppb
202045.6 ppb221.10 ppb - 90.1 ppb
2021N/A00N/A
202218.4 ppb1118.4 ppb
202347.3 ppb225.20 ppb - 89.4 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
2019-05-08AE653454.00 ppb
2020-04-23AF079511.10 ppb
2020-04-23AF0795290.1 ppb
2022-02-10AF8417018.4 ppb
2023-01-31AG266825.20 ppb
2023-02-24AG3050289.4 ppb