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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Hempstead

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

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501

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND40ND
2014ND640ND
2015ND600ND
2016ND610ND
2017ND580ND
2018ND1540ND
2019ND1000ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-06-1891028ND
2013-06-1891027 CLINTON STND
2013-12-2591028 IF0709ND
2013-12-2591027ND
2014-01-291401C35-001A-POCND
2014-01-291401C34-001A-POCND
2014-02-041402305-001-POCSND
2014-02-201402A09-001A-POCND
2014-02-251402D21-001A-POCND
2014-03-041403148-001A-POCND
2014-03-041403146-001A-POCND
2014-03-041403146-002A-POCND
2014-03-181403C85-001A-POCND
2014-03-181403C81-004-POCSND
2014-03-181403C81-001-POCSND
2014-03-181403C81-002-POCSND
2014-03-181403C81-003-POCSND
2014-03-251403H09-002-POCSND
2014-03-251403H09-001-POCSND
2014-03-251403H09-003-POCSND
2014-04-081404597-001A-POCND
2014-04-221404F92-001A-POCND
2014-05-131405930-001A-POCND
2014-05-201405E41-001A-POCND
2014-06-031406165-001-POCSND
2014-06-031406165-001A-POCND
2014-06-031406167-001-POCSND
2014-06-031406167-002-POCSND
2014-06-041406286-001A-POCND
2014-06-101406726-001-POCSND
2014-06-101406742-001A-POCND
2014-06-101406726-002-POCSND
2014-06-241406I04-002-POCSND
2014-06-241406I04-001-POCSND
2014-06-241406I04-003-POCSND
2014-06-241406I05-001A-POCND
2014-07-011407057-001-POCSND
2014-07-011407063-001A-POCND
2014-07-091407606-001A-POCND
2014-07-241407H51-001-POCSND
2014-08-191408D09-001A-POCND
2014-08-261408I76-001A-POCND
2014-09-091409644-004-POCSND
2014-09-091409644-003-POCSND
2014-09-091409644-005-POCSND
2014-09-091409644-002-POCSND
2014-09-091409644-001-POCSND
2014-09-171409D20-003-POCSND
2014-09-171409D22-001A-POCND
2014-09-171409D20-002-POCSND
2014-09-171409D20-001-POCSND
2014-09-2314091I6-001-POCSND
2014-09-231409I14-001A-POCND
2014-10-071410472-001A-POCND
2014-10-151410A28-001A-POCND
2014-11-051411260-002-POCSND
2014-11-051411260-001-POCSND
2014-11-051411260-003-POCSND
2014-11-131411911-001-POCSND
2014-11-181411C27-001-POCSND
2014-11-181411C27-002-POCSND
2014-11-181411C31-002-POCSND
2014-12-021412141-001-POCSND
2014-12-101412804-002-POCSND
2014-12-101412803-002-POCSND
2014-12-101412804-001-POCSND
2014-12-161412C20-001-POCSND
2014-12-161412C18-001-POCSND
2015-01-211501C73-001-POCSND
2015-01-281501F99-001-POCSND
2015-02-101502561-001-POCSND
2015-02-181502A85-001ND
2015-03-031503137-001ND
2015-03-031503137-002ND
2015-03-041503256-002ND
2015-03-101503603-001ND
2015-03-101503604-002ND
2015-03-101503604-001ND
2015-03-101503604-004ND
2015-03-101503604-003ND
2015-03-171503B81-002-POCSND
2015-03-171503B81-006-POCSND
2015-03-171503B81-004-POCSND
2015-04-281504L26-002ND
2015-04-281504L26-001ND
2015-05-051505272-001ND
2015-05-131505930-001ND
2015-06-161506C98-001-POCSND
2015-06-161506C98-003-POCSND
2015-06-161506C98-002-POCSND
2015-06-161506D01-001-POCSND
2015-06-241506J59-002-POCSND
2015-06-241506J59-005-POCSND
2015-06-241506J59-004-POCSND
2015-06-241506J59-003-POCSND
2015-06-241506J59-001-POCSND
2015-06-301506N81-002-POCSND
2015-06-301506N81-001-POCSND
2015-07-071507435-001-POCSND
2015-07-211507F25-001-POCSND
2015-08-181508E19-001-POCSND
2015-09-021509051-001-POCSND
2015-09-091509632-004-POCSND
2015-09-091509632-001-POCSND
2015-09-091509632-003-POCSND
2015-09-091509632-005-POCSND
2015-09-091509632-002-POCSND
2015-09-101509779-001-POCSND
2015-09-151509A46-001-POCSND
2015-09-221509G63-003-POCSND
2015-09-221509G69-001-POCSND
2015-09-221509G69-002-POCSND
2015-09-221509G69-004-POCSND
2015-10-201510F13-001-POCSND
2015-10-271510K26-001-POCSND
2015-11-121511A12-002-POCSND
2015-11-121511A11-001-POCSND
2015-11-121511A12-001-POCSND
2015-11-121511A12-003-POCSND
2015-11-171511D02-001-POCSND
2015-12-091512828-001-POCSND
2015-12-091512828-002-POCSND
2015-12-091512828-003-POCSND
2015-12-151512C79-001-POCSND
2015-12-151512C85-001-POCSND
2015-12-151512C79-003-POCSND
2015-12-151512C79-004-POCSND
2015-12-151512C79-002-POCSND
2016-01-121601669-001-POCSND
2016-01-201601D57-POCSND
2016-02-171602C78-001-POCSND
2016-02-231602G61-001-POCSND
2016-03-081603590-001-POCSND
2016-03-151603C43-003-POCSND
2016-03-151603C43-002-POCSND
2016-03-151603C43-004-POCSND
2016-03-1503/15/2016ND
2016-03-231603I93-002-POCSND
2016-03-231603I93-001-POCSND
2016-03-231603I93-003-POCSND
2016-03-231603I82-001-POCSND
2016-03-291603N27-001-POCSND
2016-03-291603N27-002-POCSND
2016-04-051604352-001-POCSND
2016-04-191604H89-001-POCSND
2016-05-101605871-001-POCSND
2016-05-171605F36-001-POCSND
2016-05-241605M07-002-POCSND
2016-05-241605M07-003-POCSND
2016-05-241605M07-001-POCSND
2016-06-141606D50-002-POCSND
2016-06-141606D50-001-POCSND
2016-06-141606D52-001-POCSND
2016-06-211606L63-003-POCSND
2016-06-211606L63-002-POCSND
2016-06-211606L63-004-POCSND
2016-06-211606L63-001-POCSND
2016-06-281606R00-001-POCSND
2016-07-061607390-001-POCSND
2016-07-191607F04-001-POCSND
2016-08-031608389-001-POCSND
2016-08-161608F38-001-POCSND
2016-09-071609469-001-POCSND
2016-09-131609902-003-POCSND
2016-09-131609902-005-POCSND
2016-09-131609902-001-POCSND
2016-09-139902-006-POCSND
2016-09-131609902-004-POCSND
2016-09-131609902-002-POCSND
2016-09-201609G65-001-POCSND
2016-09-201609G95-003-POCSND
2016-09-201609G95-002-POCSND
2016-09-271609N43-001ND
2016-10-04701150001-POCSND
2016-10-18702313001ND
2016-11-09704075001-POCSND
2016-11-22705406001ND
2016-12-06706091001-POCSND
2016-12-06706094001-POCSND
2016-12-06706094002-POCSND
2016-12-06706094003-POCSND
2016-12-13706739002-POCSND
2016-12-137013417001-POCSND
2016-12-13706739001-POCSND
2016-12-13706740001-POCSND
2016-12-20707347006-POCSND
2016-12-20707347007-POCSND
2016-12-20707347004-POCSND
2016-12-20707347005-POCSND
2017-01-0470825003-POCSND
2017-01-18709353001-POCSND
2017-02-077010730001-POCSND
2017-02-227011881001-POCSND
2017-03-077012771002-POCSND
2017-03-077012771003-POCSND
2017-03-077012771001-POCSND
2017-03-157013419001-POCSND
2017-03-157013419002-POCSND
2017-03-217013852001-POCSND
2017-03-217013848002-POCSND
2017-03-217013848003-POCSND
2017-03-217013848001-POCSND
2017-03-227013898001-POCSND
2017-04-117015515001-POCSND
2017-04-187016167001-POCSND
2017-05-027017451001-POCSND
2017-05-097018134004ND
2017-05-097018134003ND
2017-05-097018134002ND
2017-05-097018134001-POCSND
2017-05-167018712002ND
2017-05-167018712001ND
2017-05-237019308003ND
2017-05-317020023002ND
2017-05-317020023001ND
2017-06-067020501001ND
2017-06-147021347001ND
2017-06-277022528001ND
2017-06-277022533001ND
2017-07-117023666001ND
2017-07-187024503001ND
2017-08-017025832001ND
2017-08-227027938001ND
2017-09-127029634004ND
2017-09-127029634003ND
2017-09-127029634002ND
2017-09-127029635001ND
2017-09-127029634001ND
2017-09-197030329001-POCSND
2017-09-197030329002-POCSND
2017-09-197030331001-POCSND
2017-09-197030329004-POCSND
2017-09-197030329003-POCSND
2017-09-267031040001ND
2017-10-037031709003ND
2017-10-037031709002ND
2017-10-037031709004ND
2017-10-037031709001ND
2017-10-177033146001ND
2017-10-177033146003ND
2017-10-177033146002ND
2017-10-247033856001ND
2017-11-087035206001ND
2017-11-087035209001ND
2017-11-087035206002ND
2017-12-057036295001ND
2017-12-197038532001ND
2018-01-097039903001ND
2018-01-237041070001ND
2018-02-067042165003ND
2018-02-067042165001ND
2018-02-067042165002ND
2018-02-127042800001ND
2018-02-127042800002ND
2018-02-217043500001ND
2018-02-217043508001ND
2018-02-277043999001ND
2018-02-277044000001ND
2018-03-067044653001-POCSND
2018-03-147045274003ND
2018-03-147045270001ND
2018-03-147045274001ND
2018-03-147045274002ND
2018-03-147045271001ND
2018-03-147046546001ND
2018-03-207045783001ND
2018-03-307046726001-POCSND
2018-04-107047832001ND
2018-04-257049555001ND
2018-04-267049658001ND
2018-04-267049658002ND
2018-05-037050654001ND
2018-05-047050655001ND
2018-05-057050755001ND
2018-05-077050753001ND
2018-05-087051072001ND
2018-05-087050947001ND
2018-05-097051071002ND
2018-05-097051071001ND
2018-05-10705144900ND
2018-05-117051450001ND
2018-05-127051545001ND
2018-05-137051546001ND
2018-05-147051547001ND
2018-05-157051713001ND
2018-05-157051713003ND
2018-05-157051713004ND
2018-05-157051713002ND
2018-05-167052182001ND
2018-05-167052182002ND
2018-05-177052184001ND
2018-05-187052183001ND
2018-05-197052282001ND
2018-05-207052282002ND
2018-05-217052282003ND
2018-05-227052556001ND
2018-05-237052560001ND
2018-05-237052563002ND
2018-05-237052563004ND
2018-05-237052563001ND
2018-05-247052716001ND
2018-05-257052833001ND
2018-05-267052908001ND
2018-05-277052937001ND
2018-05-287052937002ND
2018-05-297052937003ND
2018-05-307053113003ND
2018-05-307053112003ND
2018-05-307053112002ND
2018-05-307053112001ND
2018-05-317053317001ND
2018-06-017053419001ND
2018-06-027053496001ND
2018-06-037053533002ND
2018-06-047053533001ND
2018-06-057053861002ND
2018-06-057053861003ND
2018-06-057053861001ND
2018-06-127054603001ND
2018-06-127054602002ND
2018-06-127054602001ND
2018-06-197055401002ND
2018-06-197055401001ND
2018-07-037057053001ND
2018-07-037057053002ND
2018-07-107057618001ND
2018-07-107057618002ND
2018-07-177058456003ND
2018-07-177058456001ND
2018-07-177058456002ND
2018-07-247059257001ND
2018-07-247059257002ND
2018-07-317059894001ND
2018-07-317059894002ND
2018-08-077060659002ND
2018-08-07706059001ND
2018-08-077060661006ND
2018-08-147061452001ND
2018-08-147061452002ND
2018-08-147061454001ND
2018-08-217062346001ND
2018-08-217062347001ND
2018-08-217062346002ND
2018-08-287063048001ND
2018-08-287063051002ND
2018-08-287063051001ND
2018-08-287063049002ND
2018-08-287063049001ND
2018-08-287063049003ND
2018-09-057063737001ND
2018-09-057063739001ND
2018-09-05706379002ND
2018-09-127064527002ND
2018-09-12064527001ND
2018-09-127064529001ND
2018-09-127064532001ND
2018-09-127064532002ND
2018-09-187065193001ND
2018-09-187065194001ND
2018-09-187065193002ND
2018-09-2570655781001ND
2018-09-257065781002ND
2018-10-027066613003ND
2018-10-027066613004ND
2018-10-027066613001ND
2018-10-027066613002ND
2018-10-107067504002ND
2018-10-107067504001ND
2018-10-167068132001ND
2018-10-167068124001ND
2018-10-167068132002ND
2018-10-167068124002ND
2018-10-167068129001ND
2018-10-237068807001ND
2018-10-237068806002ND
2018-10-237068806001ND
2018-10-307069428001ND
2018-10-307069432001ND
2018-10-307069432002ND
2018-10-307069428002ND
2018-11-077070350001ND
2018-11-077070350002ND
2018-11-147071100001ND
2018-11-147071097002ND
2018-11-147071097001ND
2018-11-217071791002ND
2018-11-217071791001ND
2018-11-277072026001ND
2018-11-277072025001ND
2018-11-277072026002ND
2018-12-047072713001ND
2018-12-047072713002ND
2018-12-117073509001ND
2018-12-117073508001ND
2018-12-117073508002ND
2018-12-197074392001ND
2018-12-197074394001ND
2018-12-197074392002ND
2018-12-197074395001ND
2018-12-267074883002ND
2018-12-267074883001ND
2019-01-037075437001ND
2019-01-037075437002ND
2019-01-087075876002ND
2019-01-087075871001ND
2019-01-087075876001ND
2019-01-087075871002ND
2019-01-157076614001ND
2019-01-157076617001ND
2019-01-157076617002ND
2019-01-237077383002ND
2019-01-237077383001ND
2019-01-237077375001ND
2019-01-237077378001ND
2019-01-237077378002ND
2019-01-297077826001ND
2019-01-297077826002ND
2019-02-057078466001ND
2019-02-057078470001ND
2019-02-057078465001ND
2019-02-057078465002ND
2019-02-057078466002ND
2019-02-127079253001ND
2019-02-127079253002ND
2019-02-207080153001ND
2019-02-207080156002ND
2019-02-207080156001ND
2019-02-267080660001ND
2019-02-267080660002ND
2019-03-057081281001ND
2019-03-057081275001ND
2019-03-057081275002ND
2019-03-127082062001ND
2019-03-127082062002ND
2019-03-197082767001ND
2019-03-197082767002ND
2019-03-197082761001ND
2019-03-267083594001ND
2019-03-267083594002ND
2019-04-027084192002ND
2019-04-027084192001ND
2019-04-027084186001ND
2019-04-097085254002ND
2019-04-097085254001ND
2019-04-107085258001ND
2019-04-107085258002ND
2019-04-167085976002ND
2019-04-167085976003ND
2019-04-167085976001ND
2019-04-237086905001ND
2019-04-307087613002ND
2019-04-307087613003ND
2019-04-307087613001ND
2019-05-077088385001ND
2019-05-147089380002ND
2019-05-147089380001ND
2019-05-217090323001ND
2019-05-287091060001ND
2019-05-287091060002ND
2019-06-047092022001ND
2019-06-047092029001ND
2019-06-047092022002ND
2019-06-197094366001ND
2019-07-027096100001ND
2019-07-027096098002ND
2019-07-027096098001ND
2019-07-117097222001ND
2019-07-247098718001ND
2019-08-0670100134001ND
2019-08-0670100134002ND
2019-08-067010011300ND
2019-08-1270101133004ND
2019-08-1270101133002ND
2019-08-1270101133003ND
2019-08-1270101133001ND
2019-08-1370101133009ND
2019-08-13770101133008ND
2019-08-1370101133006ND
2019-08-1370101133007ND
2019-08-1370101133005ND
2019-08-2070102088001ND
2019-09-0470103662001ND
2019-09-2570106222001ND
2019-10-0270107009001ND
2019-10-0270107005001ND
2019-10-0870107658001ND
2019-10-0870107658002ND
2019-10-0870107658003ND
2019-10-1670108640001ND
2019-10-2970109994001ND
2019-10-2970109994003ND
2019-10-2970109994004ND
2019-10-2970109994002ND
2019-11-0770111126002ND
2019-11-0770111126001ND
2019-11-0770111125001ND
2019-11-1970112385001ND
2019-11-1970112393001ND
2019-11-2670113201001ND
2019-11-2670113202001ND
2019-12-2470116370001ND