Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Mercury (inorganic)

Town of Hempstead Water Department

Mercury is a potent neurotoxin that also damages the kidneys and other internal organs. Mercury enters drinking water from industrial pollution, mining wastes and coal-fired power plants.

MORE ABOUT THIS CONTAMINANT

 

139

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND350ND
2015ND120ND
2016ND280ND
2017ND170ND
2018ND240ND
2019ND230ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1.2 ppb

The EWG Health Guideline of 1.2 ppb for mercury (inorganic) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for inorganic mercury, established in 1991, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-0397973-PRIND
2014-02-0498005-PRIND
2014-03-201403E39-009-PRIND
2014-03-201403E39-004-PRIND
2014-03-201403E39-003-PRIND
2014-03-201403E39-006-PRIND
2014-04-2998539-04292014-PND
2014-04-2998537-04292014-PND
2014-04-2998533-04292014-PND
2014-04-2998534-04292014-PND
2014-04-2998538-04292014-PND
2014-04-2998535-04292014-PND
2014-04-2998536-04292014-PND
2014-06-16098911-06162014-ND
2014-07-1499139-07142014-PND
2014-07-1499137-07142014-PND
2014-07-1499138-07142014-PND
2014-07-1499136-07142014-PND
2014-08-2799388-08272014-PND
2014-08-2799391-08272014-PND
2014-08-2799390-08272014-PND
2014-08-2799387-08272014-PND
2014-08-2799393-08272014-PND
2014-10-0199733-PRIND
2014-10-0299750-PRIND
2014-11-17100002-PRIND
2014-11-17100001-11172014-ND
2014-11-17100000-PRIND
2014-11-179997-11172014-PRND
2014-12-01100115-12012014-ND
2014-12-01100116-12012014-ND
2014-12-01100114-12012014-ND
2014-12-01100120-PRIND
2014-12-01100117-12012014-ND
2014-12-04100121-12012014-ND
2015-01-12100351-01122015-ND
2015-01-12100352-01122015-ND
2015-01-12100350-01122015-ND
2015-01-12100355-01122015-ND
2015-03-02100548-03022015-ND
2015-03-02100549-03022015-ND
2015-03-02100547-03022015-ND
2015-03-02100546-03022015-ND
2015-03-30100646ND
2015-03-30100645ND
2015-03-30100639ND
2015-03-30100647ND
2016-02-011602051-002-PRIND
2016-02-041602447-002 PRIND
2016-03-311603P15-001-PRIND
2016-03-311603P15-002-PRIND
2016-03-311603P15-004-PRIND
2016-03-311603P15-003-PRIND
2016-04-041604218-003-PRIND
2016-04-041604218-005-PRIND
2016-04-041604218-004-PRIND
2016-04-041604218-002-PRIND
2016-04-041604218-006-PRIND
2016-04-041604218-001ND
2016-04-251604M30-005-PRIND
2016-04-251604M30-004-PRIND
2016-04-251604M30-002-PRIND
2016-04-251604M30-006-PRIND
2016-04-251604M30-003-PRIND
2016-04-251604M30-001-PRIND
2016-05-191605I29-006-PRIND
2016-05-191605I29-007-PRIND
2016-06-031606334-002-PRIND
2016-06-161606G41-006-PRIND
2016-06-161606G41-003-PRIND
2016-06-161606G41-007-PRIND
2016-06-161606G41-003ND
2016-06-291606S43-003-PRIND
2016-08-311608S39-005-PRIND
2016-08-311608S39-003-PRIND
2017-01-30701014002-PRIND
2017-01-307010148004-PRIND
2017-01-307010148001-PRIND
2017-01-307010148007-PRIND
2017-01-307010148003-PRIND
2017-02-137011165007-PRIND
2017-02-137011165008-PRIND
2017-02-137011165006-PRIND
2017-02-137011165005-PRIND
2017-02-277012180003-PRIND
2017-02-277012180009-PRIND
2017-02-277012180005-PRIND
2017-02-277012180006-PRIND
2017-05-027017470003-PRIND
2017-05-317019963005-PRIND
2017-07-137024011003-PRIND
2017-10-257034010003-PRIND
2018-01-167040464002-PRIND
2018-01-297041520010-PRIND
2018-01-297041520003-PRIND
2018-01-297041520004-PRIND
2018-01-307041659002-PRIND
2018-04-137048404001-PRIND
2018-04-2070449155004-PRIND
2018-04-207049155005ND
2018-04-207049155001-PRIND
2018-04-207049155003ND
2018-04-207049155003-PRIND
2018-04-207049155002-PRIND
2018-04-267049700004-PRIND
2018-04-267049700003-PRIND
2018-05-097051103001-PRIND
2018-05-297052946009-PRIND
2018-05-297052946006-PRIND
2018-06-287056573001-PRIND
2018-07-0560521453-PRIND
2018-07-307059788006-PRIND
2018-07-307059788001-PRIND
2018-07-307059788007-PRIND
2018-07-307059788004-PRIND
2018-07-307059788008-PRIND
2019-01-247077506007-PRIND
2019-01-247077506003-PRIND
2019-01-247077506003ND
2019-01-247077506005-PRIND
2019-01-247077506004-PRIND
2019-01-247077506009-PRIND
2019-01-247077506006-PRIND
2019-01-297077854001-PRIND
2019-01-297077854005-PRIND
2019-02-067078608005-PRIND
2019-02-067078608007-PRIND
2019-02-067078608003-PRIND
2019-05-157089637006ND
2019-05-157089637001ND
2019-05-157089637005ND
2019-05-157089637002ND
2019-05-157089637003ND
2019-06-047091931001-PRIND
2019-06-277095546004-PRIND
2019-06-277095546005-PRIND
2019-06-277095546003-PRIND
2019-06-277095546002-PRIND
2019-08-1670101758001ND