Know Your Environment. Protect Your Health.

Manganese

Sammamish Plateau Water and Sewer

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20188.31 ppb3421ND - 149.0 ppb
20197.31 ppb3622ND - 196.0 ppb
202015.7 ppb85ND - 110.0 ppb
202132.0 ppb117ND - 342.0 ppb
202212.3 ppb31ND - 37.0 ppb
2023ND10ND

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
2018-01-090.700 ppb
2018-01-094.10 ppb
2018-02-270.500 ppb
2018-02-27ND
2018-03-132.10 ppb
2018-04-12ND
2018-05-086.50 ppb
2018-05-08ND
2018-06-1240.0 ppb
2018-06-12ND
2018-06-122.80 ppb
2018-06-12ND
2018-07-17ND
2018-07-175.50 ppb
2018-07-17149.0 ppb
2018-07-170.600 ppb
2018-08-140.600 ppb
2018-08-14ND
2018-08-1418.1 ppb
2018-08-144.40 ppb
2018-08-15ND
2018-08-15ND
2018-08-15ND
2018-08-15ND
2018-09-114.60 ppb
2018-09-1117.2 ppb
2018-09-250.500 ppb
2018-10-09ND
2018-10-233.30 ppb
2018-10-231.000 ppb
2018-11-1316.0 ppb
2018-11-133.50 ppb
2018-12-111.70 ppb
2018-12-11ND
2019-01-150.700 ppb
2019-02-14196.0 ppb
2019-02-1424.7 ppb
2019-03-29ND
2019-03-293.80 ppb
2019-04-097.50 ppb
2019-04-091.90 ppb
2019-05-21ND
2019-05-210.900 ppb
2019-05-211.10 ppb
2019-06-11ND
2019-06-114.40 ppb
2019-06-110.900 ppb
2019-07-09ND
2019-07-09ND
2019-07-092.40 ppb
2019-07-09ND
2019-08-13ND
2019-08-13ND
2019-08-131.40 ppb
2019-08-13ND
2019-08-20201908210325ND
2019-08-20201908210160ND
2019-08-202019082101590.420 ppb
2019-08-21201908220428ND
2019-08-212019082202950.670 ppb
2019-08-212019082204310.760 ppb
2019-08-282019082902561.10 ppb
2019-09-10ND
2019-09-101.50 ppb
2019-10-153.80 ppb
2019-10-15ND
2019-11-121.000 ppb
2019-11-121.50 ppb
2019-11-124.50 ppb
2019-12-102.30 ppb
2020-02-112020021203589.30 ppb
2020-02-11202002120436110.0 ppb
2020-02-182020021903280.510 ppb
2020-05-182020052004580.570 ppb
2020-07-28202007290339ND
2020-07-282020072903405.20 ppb
2020-07-28202007290341ND
2020-07-29202007300300ND
2021-01-124069501342.0 ppb
2021-01-1240695000.700 ppb
2021-02-1640806483.00 ppb
2021-02-164080647ND
2021-03-094092142ND
2021-03-0940921431.40 ppb
2021-03-1640921411.000 ppb
2021-04-134105680ND
2021-04-1341056811.10 ppb
2021-05-1841198763.00 ppb
2021-08-044159361ND
2022-07-064338517ND
2022-07-06433308037.0 ppb
2022-07-274364201ND
2023-10-104534875ND