Manganese
Tryon Road Special Utility 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.
6
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 2.50 ppb | 1 | 1 | 2.50 ppb |
| 2019 | 8.20 ppb | 1 | 1 | 8.20 ppb |
| 2020 | 5.40 ppb | 2 | 2 | 5.40 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 3.30 ppb | 1 | 1 | 3.30 ppb |
| 2023 | 7.90 ppb | 2 | 2 | 5.90 ppb - 9.90 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 |
|---|---|---|
| 2019-03-21 | Q1911930006 | 8.20 ppb |
| 2020-05-26 | Q2020608021 | 5.40 ppb |
| 2020-05-26 | Q2020608022 | 5.40 ppb |
| 2022-10-24 | Q2231972008 | 3.30 ppb |
| 2023-07-19 | Q2328456004 | 5.90 ppb |
| 2023-08-10 | Q2333267007 | 9.90 ppb |