Manganese
City of Richland Hills
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 | 0.267 ppb | 19 | 7 | ND - 1.30 ppb |
| 2019 | 1.20 ppb | 2 | 2 | 1.20 ppb |
| 2020 | 10.00 ppb | 5 | 1 | ND - 50.0 ppb |
| 2021 | ND | 5 | 0 | ND |
| 2022 | 1.15 ppb | 2 | 2 | 1.000 ppb - 1.30 ppb |
| 2023 | 2.40 ppb | 5 | 1 | ND - 12.0 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 |
|---|---|---|
| 2015-03-17 | 112601P | ND |
| 2015-03-17 | 312684P | ND |
| 2015-03-17 | 312685P | 1.30 ppb |
| 2015-03-18 | 112602P | 4.97 ppb |
| 2019-01-16 | Q1902265002 | 1.20 ppb |
| 2019-01-16 | Q1902265010 | 1.20 ppb |
| 2022-01-19 | Q2202013002 | 1.000 ppb |
| 2022-01-19 | Q2202013003 | 1.30 ppb |