Manganese
Limerick Water District
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.
5
Samples
0
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 7.10 ppb | 1 | 1 | 7.10 ppb |
| 2020 | 114.0 ppb | 1 | 1 | 114.0 ppb |
| 2021 | 36.2 ppb | 1 | 1 | 36.2 ppb |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 33.4 ppb | 2 | 1 | ND - 66.7 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 |
|---|---|---|
| 2019-12-18 | 1912-01849-002 | 7.10 ppb |
| 2020-04-09 | 2004-00924-004 | 114.0 ppb |
| 2021-06-03 | 402101012 | 36.2 ppb |
| 2023-03-20 | 2303-03667-002 | 66.7 ppb |
| 2023-09-18 | 2309-03878-002 | ND |