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EWG's Tap Water Database — 2021 UPDATE

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Manganese

Westford Water Department

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.

 

87

Samples

0

Samples exceeding legal limit (MCL)

45

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014321.4 ppb1916ND - 1,400.0 ppb
2015309.1 ppb1714ND - 1,250.0 ppb
2016530.6 ppb1110ND - 2,300.0 ppb
2017528.6 ppb106ND - 2,060.0 ppb
2018311.7 ppb2018ND - 2,000.0 ppb
2019399.6 ppb107ND - 1,590.0 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 Result
2014-03-182.00 ppb
2014-03-21ND
2014-06-04220.0 ppb
2014-06-0421.0 ppb
2014-06-04570.0 ppb
2014-06-04530.0 ppb
2014-06-041,400.0 ppb
2014-06-0465.0 ppb
2014-06-09300.0 ppb
2014-06-112.00 ppb
2014-06-11400.0 ppb
2014-06-11ND
2014-06-11640.0 ppb
2014-06-251,400.0 ppb
2014-06-30540.0 ppb
2014-07-2313.0 ppb
2014-07-23ND
2014-10-282.00 ppb
2014-10-282.00 ppb
2015-01-064.00 ppb
2015-01-063.00 ppb
2015-05-0415.0 ppb
2015-05-04210.0 ppb
2015-05-04720.0 ppb
2015-05-04210.0 ppb
2015-05-04570.0 ppb
2015-05-041,250.0 ppb
2015-05-0413.0 ppb
2015-05-04940.0 ppb
2015-05-04280.0 ppb
2015-05-04510.0 ppb
2015-05-04520.0 ppb
2015-05-04ND
2015-05-04ND
2015-07-07ND
2015-07-089.00 ppb
2016-04-0510.00 ppb
2016-04-062,300.0 ppb
2016-04-06ND
2016-04-06680.0 ppb
2016-04-061,400.0 ppb
2016-04-06670.0 ppb
2016-04-06290.0 ppb
2016-04-06280.0 ppb
2016-04-0618.0 ppb
2016-04-069.00 ppb
2016-04-06180.0 ppb
2017-06-01610.0 ppb
2017-06-01417.0 ppb
2017-06-012,060.0 ppb
2017-06-01226.0 ppb
2017-06-011,220.0 ppb
2017-06-01753.0 ppb
2017-06-01ND
2017-06-01ND
2017-06-01ND
2017-06-01ND
2018-01-242.20 ppb
2018-01-241.60 ppb
2018-04-252.00 ppb
2018-04-251.30 ppb
2018-05-1553.0 ppb
2018-05-15605.0 ppb
2018-05-152,000.0 ppb
2018-05-151,180.0 ppb
2018-05-15ND
2018-05-1511.0 ppb
2018-05-15630.0 ppb
2018-05-16305.0 ppb
2018-05-16198.0 ppb
2018-05-16826.0 ppb
2018-05-16385.0 ppb
2018-05-16ND
2018-07-173.70 ppb
2018-07-173.90 ppb
2018-10-102.00 ppb
2018-10-1025.1 ppb
2019-05-01ND
2019-05-01ND
2019-05-02492.0 ppb
2019-05-02382.0 ppb
2019-05-021,590.0 ppb
2019-05-02ND
2019-05-0246.0 ppb
2019-05-02737.0 ppb
2019-05-02204.0 ppb
2019-05-02545.0 ppb