Manganese

City of League City

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

100

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	13.0 ppb	3	3	8.70 ppb - 21.3 ppb
2015	N/A	0	0	N/A
2016	11.9 ppb	1	1	11.9 ppb
2017	12.3 ppb	3	3	3.40 ppb - 27.9 ppb
2018	6.86 ppb	89	84	ND - 88.6 ppb
2019	1.65 ppb	4	3	ND - 2.90 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
2014-04-30	AC52328	8.70 ppb
2014-08-19	AC64256	21.3 ppb
2014-12-15	AC75039	9.10 ppb
2016-01-28	AD20623	11.9 ppb
2017-05-02	AD82054	5.50 ppb
2017-05-02	AD82053	3.40 ppb
2017-09-19	AD96734	27.9 ppb
2018-03-13	18C1962-06	10.3 ppb
2018-03-13	18C1686-07	12.1 ppb
2018-03-13	18C1962-07	5.30 ppb
2018-03-13	18C1962-08	4.70 ppb
2018-03-13	18C1686-09	10.9 ppb
2018-03-13	18C1686-08	5.90 ppb
2018-03-13	18C1686-02	5.90 ppb
2018-03-13	18C1686-01	6.20 ppb
2018-03-13	18C1686-10	4.70 ppb
2018-03-13	18C1962-09	4.60 ppb
2018-03-13	18C1962-04	5.20 ppb
2018-03-13	18C1962-03	42.2 ppb
2018-03-13	18C1962-02	4.60 ppb
2018-03-13	18C1962-01	3.60 ppb
2018-03-13	18C1686-03	5.20 ppb
2018-03-13	18C1686-04	5.30 ppb
2018-03-13	18C1686-05	15.7 ppb
2018-03-13	18C1686-06	7.30 ppb
2018-03-13	18C1962-05	35.5 ppb
2018-03-14	18C1962-10	7.50 ppb
2018-06-12	18F1462-06	1.70 ppb
2018-06-12	18F1462-07	1.80 ppb
2018-06-12	18F1462-08	2.00 ppb
2018-06-12	18F1462-09	1.20 ppb
2018-06-12	18F1462-10	1.40 ppb
2018-06-12	18F1462-05	3.60 ppb
2018-06-12	18F1462-04	1.40 ppb
2018-06-12	18F1462-03	1.50 ppb
2018-06-12	18F1462-02	67.5 ppb
2018-06-12	18F1462-01	1.60 ppb
2018-06-12	18F2021-10	2.30 ppb
2018-06-12	18F2021-09	2.50 ppb
2018-06-12	18F2021-08	2.10 ppb
2018-06-12	18F2021-07	1.10 ppb
2018-06-12	18F2021-06	9.60 ppb
2018-06-12	18F2021-05	2.30 ppb
2018-06-12	18F2021-04	2.30 ppb
2018-06-12	18F2021-03	2.10 ppb
2018-06-12	18F2021-02	2.30 ppb
2018-06-12	18F2021-01	2.00 ppb
2018-07-19	35405767001SEA1	2.60 ppb
2018-07-19	35405767002SEA1	1.40 ppb
2018-07-19	35405767004SEA1	3.80 ppb
2018-07-19	35405767003SEA1	0.980 ppb
2018-09-17	18I2165-05	ND
2018-09-17	18I2165-06	2.00 ppb
2018-09-17	18I2165-07	0.900 ppb
2018-09-17	18I2165-08	0.700 ppb
2018-09-17	18I2165-09	ND
2018-09-17	18I2165-10	0.700 ppb
2018-09-17	18I2165-11	1.80 ppb
2018-09-17	18I2165-12	0.700 ppb
2018-09-17	18I2165-13	0.800 ppb
2018-09-17	18I2165-14	1.30 ppb
2018-09-17	18I2165-20	1.10 ppb
2018-09-17	18I2165-19	0.500 ppb
2018-09-17	18I2165-18	ND
2018-09-17	18I2165-17	2.90 ppb
2018-09-17	18I2165-16	2.70 ppb
2018-09-17	18I2165-01	ND
2018-09-17	18I2165-02	65.1 ppb
2018-09-17	18I2165-03	0.700 ppb
2018-09-17	18I2165-15	0.800 ppb
2018-09-17	18I2165-04	5.50 ppb
2018-10-23	35426112001SEA2	1.70 ppb
2018-10-23	35426112002SEA2	1.80 ppb
2018-11-19	18K2967-01	4.40 ppb
2018-11-19	18K2967-04	14.8 ppb
2018-11-19	18K2967-05	ND
2018-11-19	18K2967-03	5.50 ppb
2018-11-19	18K2967-06	2.90 ppb
2018-11-19	18K2967-10	4.00 ppb
2018-11-19	18K2967-09	1.000 ppb
2018-11-19	18K2967-08	6.30 ppb
2018-11-19	18K2967-07	5.30 ppb
2018-11-19	18K2967-02	88.6 ppb
2018-11-20	18K2967-17	11.5 ppb
2018-11-20	18K2967-18	4.40 ppb
2018-11-20	18K2967-11	3.90 ppb
2018-11-20	18K2967-12	2.40 ppb
2018-11-20	18K2967-13	5.00 ppb
2018-11-20	18K2967-14	4.70 ppb
2018-11-20	18K2967-15	6.20 ppb
2018-11-20	18K2967-16	6.00 ppb
2018-11-20	18K2967-19	4.80 ppb
2018-11-20	18K2967-20	4.10 ppb
2018-12-06	AE48140	3.10 ppb
2018-12-18	35438025002SEA2	2.30 ppb
2018-12-18	35438025001SEA2	3.60 ppb
2019-01-23	AE50867	2.90 ppb
2019-04-25	35464280001SEA4	2.20 ppb
2019-04-25	35464280002SEA4	ND
2019-10-15	AE86563	1.50 ppb