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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Smithtown WD

NOTE: Smithtown WD purchases water from Suffolk County Water Authority which is required to test for chloromethane. Sample information shown below was taken by Suffolk County Water Authority.

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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484

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND2290ND
2015ND120ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

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

NOTE: Smithtown WD purchases water from Suffolk County Water Authority which is required to test for chloromethane. Sample information shown below was taken by Suffolk County Water Authority.

Date Lab ID Result
2013-01-03201575650ND
2013-01-04201574771ND
2013-01-10201574770ND
2013-01-10201575363ND
2013-01-11201573042ND
2013-02-06201590257ND
2013-02-06201588603ND
2013-02-07201590328ND
2013-02-08201590287ND
2013-02-08201590298ND
2013-02-13201587911ND
2013-02-13201590281ND
2013-02-15201590304ND
2013-02-15201590311ND
2013-02-26201590251ND
2013-02-26201590329ND
2013-02-27201590258ND
2013-02-27201587865ND
2013-03-01201604141ND
2013-03-05201574756ND
2013-03-06201604801ND
2013-03-06201603020ND
2013-03-06201604826ND
2013-03-07201604199ND
2013-03-07201602989ND
2013-03-08201604844ND
2013-03-08201603115ND
2013-03-08201603260ND
2013-03-13201599973ND
2013-03-14201604820ND
2013-03-14201604795ND
2013-03-15201602223ND
2013-03-18201602224ND
2013-03-18201605263ND
2013-03-21201603297ND
2013-03-21201604808ND
2013-03-21201604807ND
2013-03-22201604819ND
2013-03-22201600706ND
2013-03-22201611882ND
2013-03-22201611884ND
2013-03-27201601398ND
2013-03-27201603039ND
2013-03-27201600738ND
2013-03-27201600567ND
2013-03-28201611874ND
2013-03-28201604843ND
2013-03-28201611890ND
2013-04-01201611880ND
2013-04-01201611892ND
2013-04-02201611886ND
2013-04-02201611876ND
2013-04-02201611878ND
2013-04-04201590268ND
2013-04-05201621683ND
2013-04-05201618338ND
2013-04-05201618349ND
2013-04-05201618392ND
2013-04-05201618391ND
2013-04-10201590305ND
2013-04-11201614161ND
2013-04-11201617293ND
2013-04-11201618380ND
2013-04-12201616754ND
2013-04-12201618367ND
2013-04-17201617352ND
2013-04-17201618421ND
2013-04-17201613344ND
2013-04-18201618415ND
2013-04-19201616844ND
2013-04-19201618356ND
2013-04-23201618398ND
2013-04-23201618368ND
2013-05-03201635591ND
2013-05-03201635620ND
2013-05-09201635553ND
2013-05-15201632363ND
2013-05-15201635609ND
2013-05-15201632151ND
2013-05-16201633470ND
2013-05-16201645650ND
2013-05-17201635571ND
2013-05-23201635554ND
2013-05-23201649578ND
2013-05-24201635572ND
2013-05-24201635583ND
2013-05-31201632241ND
2013-05-31201635565ND
2013-05-31201650435ND
2013-06-05201636526ND
2013-06-05201640344ND
2013-06-06201632230ND
2013-06-07201635912ND
2013-06-07201650441ND
2013-06-12201638677ND
2013-06-13201638679ND
2013-06-13201638678ND
2013-06-13201636408ND
2013-06-13201638680ND
2013-06-13201632127ND
2013-06-14201647891ND
2013-06-14201636320ND
2013-06-14201650210ND
2013-06-19201650216ND
2013-06-19201650218ND
2013-06-19201650208ND
2013-06-20201638692ND
2013-06-20201643649ND
2013-06-20201638676ND
2013-06-20201638689ND
2013-06-21201650429ND
2013-06-21201641158ND
2013-06-21201650214ND
2013-06-26201634004ND
2013-06-26201628781ND
2013-06-26201650452ND
2013-06-27201638681ND
2013-07-03201671852ND
2013-07-05201671520ND
2013-07-05201647639ND
2013-07-10201673989ND
2013-07-10201662719ND
2013-07-10201673983ND
2013-07-17201673214ND
2013-07-17201662665ND
2013-07-18201647712ND
2013-07-18201673221ND
2013-07-19201673203ND
2013-07-19201667198ND
2013-07-23201679029ND
2013-07-24201673202ND
2013-07-24201667421ND
2013-07-25201673220ND
2013-07-25201668305ND
2013-07-31201670997ND
2013-07-31201670999ND
2013-08-02201689435ND
2013-08-05201690777ND
2013-08-06201690935ND
2013-08-07201684279ND
2013-08-07201690927ND
2013-08-09201689679ND
2013-08-09201689166ND
2013-08-13201684998ND
2013-08-14201688423ND
2013-08-16201687899ND
2013-08-20201687526ND
2013-08-21201666718ND
2013-08-23201684303ND
2013-08-23201666665ND
2013-08-27201684958ND
2013-08-27201690936ND
2013-08-30201689176ND
2013-08-30201685004ND
2013-09-04201703953ND
2013-09-04201701816ND
2013-09-04201703979ND
2013-09-05201703063ND
2013-09-05201701773ND
2013-09-06201702994ND
2013-09-16201703997ND
2013-09-16201701923ND
2013-09-16201702339ND
2013-09-17201703973ND
2013-09-17201703947ND
2013-09-17201698426ND
2013-09-18201703972ND
2013-09-18201699601ND
2013-09-19201703960ND
2013-09-19201702441ND
2013-09-19201703959ND
2013-09-26201703996ND
2013-09-27201701834ND
2013-09-27201699637ND
2013-09-27201699111ND
2013-09-27201700237ND
2013-09-27201703985ND
2013-10-07201718887ND
2013-10-07201718869ND
2013-10-07201718870ND
2013-10-07201718876ND
2013-10-08201720912ND
2013-10-09201717013ND
2013-10-09201720867ND
2013-10-09201715539ND
2013-10-10201720861ND
2013-10-11201719442ND
2013-10-11201715602ND
2013-10-17201720807ND
2013-10-17201720844ND
2013-10-18201720266ND
2013-10-18201720814ND
2013-10-31201735601ND
2013-11-04201735663ND
2013-11-05201719584ND
2013-11-05201720813ND
2013-11-05201715203ND
2013-11-06201734529ND
2013-11-06201730201ND
2013-11-06201737974ND
2013-11-06201737963ND
2013-11-06201737986ND
2013-11-07201737944ND
2013-11-07201727623ND
2013-11-08201720797ND
2013-11-08201737921ND
2013-11-08201730307ND
2013-11-08201720868ND
2013-11-13201730397ND
2013-11-13201737975ND
2013-11-13201730207ND
2013-11-14201720825ND
2013-11-14201737932ND
2013-11-19201737951ND
2013-11-20201712858ND
2013-11-20201720850ND
2013-11-20201720826ND
2013-11-20201720838ND
2013-11-20201720837ND
2013-11-20201716920ND
2013-11-21201737950ND
2013-11-22201735414ND
2013-11-22201737933ND
2013-11-27201719471ND
2013-12-04201738638ND
2013-12-04201734659ND
2013-12-05201730185ND
2013-12-06201730296ND
2013-12-09201752257ND
2013-12-11201740135ND
2013-12-12201737962ND
2013-12-12201734516ND
2013-12-13201749179ND
2013-12-13201734395ND
2013-12-18201736513ND
2013-12-18201730999ND
2013-12-18201749510ND
2013-12-19201742791ND
2013-12-20201762654ND
2013-12-20201745711ND
2013-12-20201743231ND
2013-12-26201734010ND
2013-12-26201747678ND
2014-01-02201766626ND
2014-01-06201761349ND
2014-01-08201766202ND
2014-01-08201766049ND
2014-01-08201766613ND
2014-01-16201766624ND
2014-01-17201766595ND
2014-01-17201766589ND
2014-01-17201766601ND
2014-01-17201766607ND
2014-01-23201764359ND
2014-01-23201763419ND
2014-01-24201765722ND
2014-01-24201761224ND
2014-01-28201766625ND
2014-01-29201763320ND
2014-01-29201763984ND
2014-02-05201774770ND
2014-02-05201774800ND
2014-02-05201774764ND
2014-02-06201774794ND
2014-02-06201774758ND
2014-02-14201774740ND
2014-02-14201774734ND
2014-02-17201776380ND
2014-02-19201774746ND
2014-02-19201776387ND
2014-02-20201774806ND
2014-02-21201774776ND
2014-02-21201774788ND
2014-02-21201774812ND
2014-02-26201790532ND
2014-03-05201790653ND
2014-03-05201790593ND
2014-03-06201790647ND
2014-03-06201790641ND
2014-03-07201790581ND
2014-03-07201790587ND
2014-03-07201791030ND
2014-03-12201790599ND
2014-03-12201791028ND
2014-03-13201790623ND
2014-03-13201797485ND
2014-03-14201790677ND
2014-03-20201790665ND
2014-03-20201790671ND
2014-03-21201790635ND
2014-03-21201790617ND
2014-03-21201790629ND
2014-03-21201790659ND
2014-03-24201790611ND
2014-03-26201790539ND
2014-03-26201790557ND
2014-03-26201790551ND
2014-03-27201805764ND
2014-03-27201790575ND
2014-03-27201790563ND
2014-03-27201790545ND
2014-04-01201804917ND
2014-04-01201803826ND
2014-04-01201801968ND
2014-04-03201804969ND
2014-04-03201804975ND
2014-04-04201804453ND
2014-04-04201803888ND
2014-04-08201798750ND
2014-04-08201800579ND
2014-04-09201804961ND
2014-04-10201804955ND
2014-04-10201804923ND
2014-04-15201803833ND
2014-04-15201804933ND
2014-04-15201804939ND
2014-04-15201800391ND
2014-04-17201790605ND
2014-04-22201804945ND
2014-04-22201800429ND
2014-04-22201800435ND
2014-04-23201800717ND
2014-04-24201800748ND
2014-04-24201800544ND
2014-04-25201805008ND
2014-04-25201800510ND
2014-04-29201803955ND
2014-04-29201800563ND
2014-05-01201823042ND
2014-05-01201821643ND
2014-05-01201817543ND
2014-05-01201822188ND
2014-05-02201821571ND
2014-05-02201822052ND
2014-05-07201822253ND
2014-05-08201815921ND
2014-05-09201815913ND
2014-05-14201823048ND
2014-05-14201822143ND
2014-05-14201818879ND
2014-05-15201819113ND
2014-05-15201823022ND
2014-05-15201823034ND
2014-05-15201823028ND
2014-05-15201822602ND
2014-05-16201822033ND
2014-05-16201818011ND
2014-05-16201823014ND
2014-05-20201804981ND
2014-05-20201830439ND
2014-05-28201823006ND
2014-05-29201839154ND
2014-06-04201838962ND
2014-06-04201838935ND
2014-06-05201839606ND
2014-06-11201790533ND
2014-06-11201790569ND
2014-06-17201847014ND
2014-06-25201855306ND
2014-07-02201854657ND
2014-07-02201853415ND
2014-07-02201854662ND
2014-07-03201851206ND
2014-07-03201859129ND
2014-07-10201854628ND
2014-07-11201853502ND
2014-07-11201800503ND
2014-07-18201854567ND
2014-07-18201852887ND
2014-07-24201854433ND
2014-07-24201854475ND
2014-07-24201854481ND
2014-07-24201854487ND
2014-07-30201837980ND
2014-07-30201850158ND
2014-08-01201862584ND
2014-08-01201862632ND
2014-08-01201862578ND
2014-08-05201861530ND
2014-08-06201862572ND
2014-08-08201854508ND
2014-08-08201849108ND
2014-08-08201862644ND
2014-08-13201862566ND
2014-08-13201862560ND
2014-08-15201862608ND
2014-08-15201862638ND
2014-08-19201869060ND
2014-08-20201862626ND
2014-08-20201862620ND
2014-08-22201840988ND
2014-08-22201862602ND
2014-09-03201883924ND
2014-09-03201888499ND
2014-09-05201862596ND
2014-09-05201888487ND
2014-09-05201888493ND
2014-09-08201888559ND
2014-09-08201888553ND
2014-09-09201888523ND
2014-09-10201888517ND
2014-09-10201888511ND
2014-09-10201720879ND
2014-09-12201888547ND
2014-09-12201888811ND
2014-09-12201888541ND
2014-09-12201888529ND
2014-09-15201888505ND
2014-09-16201898450ND
2014-09-16201896970ND
2014-09-17201884502ND
2014-09-17201888864ND
2014-09-17201888475ND
2014-09-17201888457ND
2014-09-17201888451ND
2014-09-23201888573ND
2014-09-24201888567ND
2014-09-24201888022ND
2014-09-24201900233ND
2014-09-26201896976ND
2014-09-26201885197ND
2014-09-26201898462ND
2014-09-26201898456ND
2014-10-01201888445ND
2014-10-01201888481ND
2014-10-01201903093ND
2014-10-01201888463ND
2014-10-01201888439ND
2014-10-06201848217ND
2014-10-09201907986ND
2014-10-10201888783ND
2014-10-10201903192ND
2014-10-10201904986ND
2014-10-10201908002ND
2014-10-15201900124ND
2014-10-15201908052ND
2014-10-17201906923ND
2014-10-17201905129ND
2014-10-20201908018ND
2014-10-20201905396ND
2014-10-24201907612ND
2014-10-24201908024ND
2014-10-27201920419ND
2014-10-29201908032ND
2014-10-29201908038ND
2014-10-29201908044ND
2014-10-30201920788ND
2014-10-30201919213ND
2014-10-31201907996ND
2014-10-31201904371ND
2014-10-31201904945ND
2014-10-31201924489ND
2014-11-04201920742ND
2014-11-04201920736ND
2014-11-05201920782ND
2014-11-05201920776ND
2014-11-05201917386ND
2014-11-05201920716ND
2014-11-07201920730ND
2014-11-07201901786ND
2014-11-10201926831ND
2014-11-10201914153ND
2014-11-12201920748ND
2014-11-14201920019ND
2014-11-14201920012ND
2014-11-18201922192ND
2014-11-20201920768ND
2014-11-20201920756ND
2014-11-20201920762ND
2014-11-21201920722ND
2014-12-01201938577ND
2014-12-17201939197ND
2015-01-08201939196ND
2015-03-12201975521ND
2015-03-12201975539ND
2015-06-09202029373ND
2015-06-09201995729ND
2015-06-09202029502ND
2015-06-09202029512ND
2015-06-09202029690ND
2015-06-09202029495ND
2015-07-27202051941ND
2015-07-27202051935ND
2015-09-15202071539ND