Manganese

North Penn Water Authority

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	N/A	0	0	N/A
2015	ND	1	0	ND
2016	N/A	0	0	N/A
2017	N/A	0	0	N/A
2018	N/A	0	0	N/A
2019	9.91 ppb	13	11	ND - 57.8 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
2015-12-09	13633906	ND
2019-10-07	4447610	1.49 ppb
2019-10-07	4447586	7.60 ppb
2019-10-07	4447789	57.8 ppb
2019-10-07	4447846	6.93 ppb
2019-10-07	4447413	4.80 ppb
2019-10-07	4447765	24.9 ppb
2019-10-07	4447522	0.457 ppb
2019-10-07	4447783	ND
2019-10-07	4447401	ND
2019-10-07	4447595	0.991 ppb
2019-10-07	4447659	11.7 ppb
2019-10-07	4447673	6.89 ppb
2019-10-07	4447854	5.22 ppb
2020-01-07	4531765	10.3 ppb
2020-04-07	4604380	11.3 ppb
2020-04-15	4609688	ND
2020-04-15	4609363	0.587 ppb
2020-04-15	4609468	4.20 ppb
2020-04-15	4609283	14.6 ppb
2020-04-15	4609376	7.21 ppb
2020-04-15	4609805	5.29 ppb
2020-04-22	4613285	23.8 ppb
2020-04-22	4613047	8.12 ppb
2020-04-22	4613400	29.2 ppb
2020-04-22	4613350	ND
2020-04-22	4613055	ND
2020-07-07	4666356	4.62 ppb