Know Your Environment. Protect Your Health.

Manganese

Harris County Fresh Water Supply District 1a

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.

 

2

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201832.5 ppb1132.5 ppb
201913.8 ppb1113.8 ppb
202014.9 ppb1114.9 ppb
20218.30 ppb118.30 ppb
2022139.3 ppb222.50 ppb - 276.0 ppb
20230.550 ppb21ND - 1.10 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
2018-01-24AE1008432.5 ppb
2021-03-08AF456148.30 ppb