Manganese

City of McKinney

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	1.13 ppb	3	3	0.856 ppb - 1.40 ppb
2015	4.37 ppb	3	2	ND - 11.0 ppb
2016	6.83 ppb	3	3	0.500 ppb - 17.0 ppb
2017	4.95 ppb	2	2	4.50 ppb - 5.40 ppb
2018	ND	26	0	ND
2019	4.70 ppb	2	2	4.60 ppb - 4.80 ppb

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
2018-09-20	Q1837819007	ND
2018-09-20	Q1837819012	ND
2018-09-20	Q1837819011	ND
2018-09-20	Q1837819010	ND
2018-09-20	Q1837819009	ND
2018-09-20	Q1837819008	ND
2018-09-20	Q1837819001	ND
2018-09-20	Q1837819006	ND
2018-09-20	Q1837819005	ND
2018-09-20	Q1837819004	ND
2018-09-20	Q1837819003	ND
2018-09-20	Q1837819002	ND
2018-09-20	Q1837819013	ND
2018-11-13	Q1845787012	ND
2018-11-13	Q1845787011	ND
2018-11-13	Q1845787010	ND
2018-11-13	Q1845787009	ND
2018-11-13	Q1845787008	ND
2018-11-13	Q1845787007	ND
2018-11-13	Q1845787006	ND
2018-11-13	Q1845787005	ND
2018-11-13	Q1845787004	ND
2018-11-13	Q1845787003	ND
2018-11-13	Q1845787002	ND
2018-11-13	Q1845787001	ND
2018-11-13	Q1845787013	ND
2020-01-13	Q2001035001	2.10 ppb
2020-04-20	Q2015372001	19.3 ppb
2020-07-13	Q2027223001	3.70 ppb
2020-10-13	Q2039931001	4.90 ppb