Manganese
City of Goldthwaite
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.
8
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 | 1.000 ppb | 1 | 1 | 1.000 ppb |
| 2019 | 3.05 ppb | 2 | 2 | 2.10 ppb - 4.00 ppb |
| 2020 | 1.50 ppb | 1 | 1 | 1.50 ppb |
| 2021 | 7.20 ppb | 1 | 1 | 7.20 ppb |
| 2022 | 7.70 ppb | 2 | 2 | 4.70 ppb - 10.7 ppb |
| 2023 | ND | 1 | 0 | ND |
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 |
|---|---|---|
| 2018-01-18 | AE09193 | 1.000 ppb |
| 2019-02-28 | AE56487 | 2.10 ppb |
| 2019-11-20 | AE89893 | 4.00 ppb |
| 2020-01-16 | AE93928 | 1.50 ppb |
| 2021-03-01 | AF44567 | 7.20 ppb |
| 2022-01-27 | AF82100 | 4.70 ppb |
| 2022-04-14 | AF93286 | 10.7 ppb |
| 2023-01-11 | AG23976 | ND |