Manganese
Connecticut Water Company - Coventry Hills Div
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.
43
Samples
0
Samples exceeding legal limit (MCL)
2
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 49.5 ppb | 11 | 11 | 1.000 ppb - 270.0 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 6.88 ppb | 8 | 8 | 1.000 ppb - 44.0 ppb |
| 2017 | 3.75 ppb | 8 | 8 | 1.000 ppb - 7.00 ppb |
| 2018 | 1.000 ppb | 8 | 4 | ND - 2.00 ppb |
| 2019 | ND | 8 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-01-07 | 140107-0024FEMN | 110.0 ppb |
| 2014-02-21 | 140221-0002FEMN | 270.0 ppb |
| 2014-04-02 | BG26828IOC1 | 3.00 ppb |
| 2014-04-03 | 140402-0138FEMN | 20.0 ppb |
| 2014-05-05 | 140505-0231FEMN | 30.0 ppb |
| 2014-07-21 | 140721-0112FEMN | 20.0 ppb |
| 2014-07-21 | BG79090IOC1 | 1.000 ppb |
| 2014-08-04 | 140804-0218FEMN | 20.0 ppb |
| 2014-09-08 | 140908-0142FEMN | 30.0 ppb |
| 2014-10-01 | 141001-0062FEMN | 20.0 ppb |
| 2014-11-03 | 141103-0198FEMN | 20.0 ppb |
| 2016-02-02 | BK60592IOC1 | 44.0 ppb |
| 2016-03-02 | BK72867IOC1 | 2.00 ppb |
| 2016-04-05 | BN06860IOC1 | 2.00 ppb |
| 2016-05-03 | BN24732IOC1 | 2.00 ppb |
| 2016-07-11 | BN70508IOC1 | 1.000 ppb |
| 2016-08-02 | BN84843IOC1 | 1.000 ppb |
| 2016-10-04 | BV36924IOC1 | 2.00 ppb |
| 2016-11-07 | BV78469IOC1 | 1.000 ppb |
| 2017-01-10 | BX19147IOC1 | 1.000 ppb |
| 2017-02-06 | BX46265IOC1 | 4.00 ppb |
| 2017-04-04 | BX98829IOC1 | 4.00 ppb |
| 2017-05-02 | BY13649IOC1 | 7.00 ppb |
| 2017-07-11 | BY56596IOC1 | 4.00 ppb |
| 2017-08-08 | BY80447IOC1 | 3.00 ppb |
| 2017-10-03 | BZ14204IOC1 | 3.00 ppb |
| 2017-11-06 | BZ33311IOC1 | 4.00 ppb |
| 2018-01-08 | BZ69624IOC1 | 2.00 ppb |
| 2018-02-05 | BZ84817IOC1 | ND |
| 2018-04-09 | CA16666IOC1 | 2.00 ppb |
| 2018-05-08 | CA42985IOC1 | 2.00 ppb |
| 2018-07-10 | CA87113 | 2.00 ppb |
| 2018-09-26 | IOC 200506952 | ND |
| 2018-10-01 | 200507403 | ND |
| 2018-11-05 | IOC 200511407 | ND |
| 2019-01-08 | IOC 200517960 | ND |
| 2019-02-05 | IOC 200520605 | ND |
| 2019-04-02 | IOC 200526805 | ND |
| 2019-05-07 | IOC 200531060 | ND |
| 2019-07-16 | IOC 200540666 | ND |
| 2019-08-05 | IOC 200543425 | ND |
| 2019-10-01 | IOC 200550986 | ND |
| 2019-11-06 | IOC 200555613 | ND |