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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Suffolk County Water Authority

Cobalt is a metal found throughout the environment; people may be exposed to cobalt in air, food and drinking water.

MORE ABOUT THIS CONTAMINANT

 

808

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0387 ppb4258ND - 4.55 ppb
20140.0627 ppb36912ND - 7.49 ppb
20150.526 ppb142ND - 5.19 ppb
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 70 ppb

The EWG Health Guideline of 70 ppb for cobalt was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against change in blood chemistry.

ppb = parts per billion

All test results

Date Lab ID Result
2013-01-03201572490ND
2013-01-032015756501.03 ppb
2013-01-04201572545ND
2013-01-04201574771ND
2013-01-10201572522ND
2013-01-10201574770ND
2013-01-10201575363ND
2013-01-11201572493ND
2013-01-11201573042ND
2013-01-25201572548ND
2013-01-25201575568ND
2013-01-29201572527ND
2013-01-29201572529ND
2013-01-29201575567ND
2013-01-29201575556ND
2013-01-30201572583ND
2013-01-30201575369ND
2013-02-06201587842ND
2013-02-06201588603ND
2013-02-08201587901ND
2013-02-15201587916ND
2013-02-15201590304ND
2013-02-15201590311ND
2013-02-20201587905ND
2013-02-20201590274ND
2013-02-21201587896ND
2013-02-21201590275ND
2013-02-22201587920ND
2013-02-22201590322ND
2013-02-26201587946ND
2013-02-26201590251ND
2013-02-26201590329ND
2013-02-27201587864ND
2013-02-27201587879ND
2013-02-27201590258ND
2013-02-27201587865ND
2013-03-01201599988ND
2013-03-01201604141ND
2013-03-05201572585ND
2013-03-06201599994ND
2013-03-06201603020ND
2013-03-06201604826ND
2013-03-07201600022ND
2013-03-07201599942ND
2013-03-07201604199ND
2013-03-07201602989ND
2013-03-11201607484ND
2013-03-11201607488ND
2013-03-11201607490ND
2013-03-11201607482ND
2013-03-11201607486ND
2013-03-13201599977ND
2013-03-13201599973ND
2013-03-14201599958ND
2013-03-14201599919ND
2013-03-142016048201.03 ppb
2013-03-14201604795ND
2013-03-15201601597ND
2013-03-15201607496ND
2013-03-18201607494ND
2013-03-18201607492ND
2013-03-18201607476ND
2013-03-18201607480ND
2013-03-18201607478ND
2013-03-21201603297ND
2013-03-21201604808ND
2013-03-21201604807ND
2013-03-22201599944ND
2013-03-22201599962ND
2013-03-22201604819ND
2013-03-22201600706ND
2013-03-26201608420ND
2013-03-26201608418ND
2013-03-26201608416ND
2013-03-26201608410ND
2013-03-26201608412ND
2013-03-26201608424ND
2013-03-26201608414ND
2013-03-26201608422ND
2013-03-26201608408ND
2013-03-27201600006ND
2013-03-27201601398ND
2013-03-27201603039ND
2013-03-27201600738ND
2013-03-27201600567ND
2013-03-28201600003ND
2013-03-28201604843ND
2013-04-04201590268ND
2013-04-05201613293ND
2013-04-05201613291ND
2013-04-05201621683ND
2013-04-05201618338ND
2013-04-05201618349ND
2013-04-05201618392ND
2013-04-05201618391ND
2013-04-10201587921ND
2013-04-10201590305ND
2013-04-11201613256ND
2013-04-11201614161ND
2013-04-11201617293ND
2013-04-11201618380ND
2013-04-12201613248ND
2013-04-12201626417ND
2013-04-12201613238ND
2013-04-12201616754ND
2013-04-12201618367ND
2013-04-17201618421ND
2013-04-17201617352ND
2013-04-17201613344ND
2013-04-17201613353ND
2013-04-17201613356ND
2013-04-18201613337ND
2013-04-18201618415ND
2013-04-19201613229ND
2013-04-19201613311ND
2013-04-19201616844ND
2013-04-19201618356ND
2013-04-19201626408ND
2013-04-22201626411ND
2013-04-22201626410ND
2013-04-22201632770ND
2013-04-22201626415ND
2013-04-22201626413ND
2013-04-23201613289ND
2013-04-23201613254ND
2013-04-23201618398ND
2013-04-23201618368ND
2013-04-232016183791.36 ppb
2013-04-24201618439ND
2013-04-24201613372ND
2013-04-24201618422ND
2013-04-24201618428ND
2013-04-25201613225ND
2013-04-25201613232ND
2013-04-25201618355ND
2013-04-26201613213ND
2013-04-26201613252ND
2013-04-26201616958ND
2013-04-29201613299ND
2013-04-29201618404ND
2013-04-30201604832ND
2013-04-30201635798ND
2013-05-01201628798ND
2013-05-01201635608ND
2013-05-01201635590ND
2013-05-01201635597ND
2013-05-01201628794ND
2013-05-02201628651ND
2013-05-02201635547ND
2013-05-03201635591ND
2013-05-03201635620ND
2013-05-03201628808ND
2013-05-03201628795ND
2013-05-09201628656ND
2013-05-09201635553ND
2013-05-15201632363ND
2013-05-15201635609ND
2013-05-15201632151ND
2013-05-15201628805ND
2013-05-15201628803ND
2013-05-15201628800ND
2013-05-16201633470ND
2013-05-16201613358ND
2013-05-16201628724ND
2013-05-16201645650ND
2013-05-17201635571ND
2013-05-17201628751ND
2013-05-23201628709ND
2013-05-23201628708ND
2013-05-232016495781.91 ppb
2013-05-23201635554ND
2013-05-24201628754ND
2013-05-24201635572ND
2013-05-24201635583ND
2013-05-24201628755ND
2013-05-31201628645ND
2013-05-31201632241ND
2013-05-312016355654.55 ppb
2013-05-31201650435ND
2013-05-31201628706ND
2013-06-05201636526ND
2013-06-05201643937ND
2013-06-05201643938ND
2013-06-05201640344ND
2013-06-06201643849ND
2013-06-06201632230ND
2013-06-07201643907ND
2013-06-07201635912ND
2013-06-07201650441ND
2013-06-12201643913ND
2013-06-12201638169ND
2013-06-13201643960ND
2013-06-13201636408ND
2013-06-13201632127ND
2013-06-14201643886ND
2013-06-14201647891ND
2013-06-14201636320ND
2013-06-17201613366ND
2013-06-17201660195ND
2013-06-20201643903ND
2013-06-20201643649ND
2013-06-21201650429ND
2013-06-21201641158ND
2013-06-26201643968ND
2013-06-26201662283ND
2013-06-26201643967ND
2013-06-26201634004ND
2013-06-26201628781ND
2013-06-26201650452ND
2013-07-03201647577ND
2013-07-03201671852ND
2013-07-05201647487ND
2013-07-05201647484ND
2013-07-05201671520ND
2013-07-05201647639ND
2013-07-10201647525ND
2013-07-10201662719ND
2013-07-11201678043ND
2013-07-11201678041ND
2013-07-17201647510ND
2013-07-17201673214ND
2013-07-17201662665ND
2013-07-18201647532ND
2013-07-18201647575ND
2013-07-18201647712ND
2013-07-18201673221ND
2013-07-19201647494ND
2013-07-19201673203ND
2013-07-19201667198ND
2013-07-23201679054ND
2013-07-23201679029ND
2013-07-24201647531ND
2013-07-24201647478ND
2013-07-24201673202ND
2013-07-24201667421ND
2013-07-25201647515ND
2013-07-25201647517ND
2013-07-25201673220ND
2013-07-25201668305ND
2013-07-31201647438ND
2013-07-31201670997ND
2013-07-31201670999ND
2013-08-02201666710ND
2013-08-02201689435ND
2013-08-06201666760ND
2013-08-06201690935ND
2013-08-07201666640ND
2013-08-07201690927ND
2013-08-07201684279ND
2013-08-09201666699ND
2013-08-09201666706ND
2013-08-09201689679ND
2013-08-09201689166ND
2013-08-13201666732ND
2013-08-13201684998ND
2013-08-14201666731ND
2013-08-14201688423ND
2013-08-16201666701ND
2013-08-16201687899ND
2013-08-20201666703ND
2013-08-20201687526ND
2013-08-21201666708ND
2013-08-21201666718ND
2013-08-23201666662ND
2013-08-23201666675ND
2013-08-23201684303ND
2013-08-23201666665ND
2013-08-27201666765ND
2013-08-27201684958ND
2013-08-27201690936ND
2013-08-30201690929ND
2013-08-30201666729ND
2013-08-30201689176ND
2013-08-30201685004ND
2013-09-04201698448ND
2013-09-04201703953ND
2013-09-04201701816ND
2013-09-04201703979ND
2013-09-05201698476ND
2013-09-05201698391ND
2013-09-05201703063ND
2013-09-05201701773ND
2013-09-06201698442ND
2013-09-06201702994ND
2013-09-16201698545ND
2013-09-16201698525ND
2013-09-16201703997ND
2013-09-16201701923ND
2013-09-16201702339ND
2013-09-17201698431ND
2013-09-17201698407ND
2013-09-17201698374ND
2013-09-17201703973ND
2013-09-17201703947ND
2013-09-17201698426ND
2013-09-18201698393ND
2013-09-18201698413ND
2013-09-18201703972ND
2013-09-18201699601ND
2013-09-19201703960ND
2013-09-19201698394ND
2013-09-19201702441ND
2013-09-19201703959ND
2013-09-26201698457ND
2013-09-26201703996ND
2013-09-27201698460ND
2013-09-27201701834ND
2013-09-27201700237ND
2013-09-27201699637ND
2013-09-27201699111ND
2013-09-27201703985ND
2013-10-07201718887ND
2013-10-07201715481ND
2013-10-07201718869ND
2013-10-07201718870ND
2013-10-08201720912ND
2013-10-09201717013ND
2013-10-09201720867ND
2013-10-09201715539ND
2013-10-09201715549ND
2013-10-09201715546ND
2013-10-10201715532ND
2013-10-10201720861ND
2013-10-11201715400ND
2013-10-11201719442ND
2013-10-11201715428ND
2013-10-11201715602ND
2013-10-17201715483ND
2013-10-17201720807ND
2013-10-17201720844ND
2013-10-18201715490ND
2013-10-18201715416ND
2013-10-18201720266ND
2013-10-18201720814ND
2013-10-31201730924ND
2013-10-31201735601ND
2013-11-04201730887ND
2013-11-04201735663ND
2013-11-05201715419ND
2013-11-05201715503ND
2013-11-05201715414ND
2013-11-05201719584ND
2013-11-05201720813ND
2013-11-05201715203ND
2013-11-06201731014ND
2013-11-06201734529ND
2013-11-06201730201ND
2013-11-06201737974ND
2013-11-06201737963ND
2013-11-06201737986ND
2013-11-06201731010ND
2013-11-06201731024ND
2013-11-06201731011ND
2013-11-072017379444.53 ppb
2013-11-07201727623ND
2013-11-07201730921ND
2013-11-08201715551ND
2013-11-08201730876ND
2013-11-08201738031ND
2013-11-08201720797ND
2013-11-08201737921ND
2013-11-08201720868ND
2013-11-13201730397ND
2013-11-13201737975ND
2013-11-13201730207ND
2013-11-13201731019ND
2013-11-13201731021ND
2013-11-13201731016ND
2013-11-14201715422ND
2013-11-14201730882ND
2013-11-142017208251.000 ppb
2013-11-14201737932ND
2013-11-18201739238ND
2013-11-18201739240ND
2013-11-19201730974ND
2013-11-19201737951ND
2013-11-20201715442ND
2013-11-20201715479ND
2013-11-20201715430ND
2013-11-20201712858ND
2013-11-20201720850ND
2013-11-20201720826ND
2013-11-20201720838ND
2013-11-202017208371.05 ppb
2013-11-20201716920ND
2013-11-21201737950ND
2013-11-21201730972ND
2013-11-22201735414ND
2013-11-22201730923ND
2013-11-22201730938ND
2013-11-22201737933ND
2013-11-27201715425ND
2013-11-27201719471ND
2013-12-04201738638ND
2013-12-04201734659ND
2013-12-04201743042ND
2013-12-04201743041ND
2013-12-05201743074ND
2013-12-05201730185ND
2013-12-06201742942ND
2013-12-06201730296ND
2013-12-09201752257ND
2013-12-11201743016ND
2013-12-11201740135ND
2013-12-12201730975ND
2013-12-12201743066ND
2013-12-12201737962ND
2013-12-12201734516ND
2013-12-13201742988ND
2013-12-13201749179ND
2013-12-13201734395ND
2013-12-18201743071ND
2013-12-18201743070ND
2013-12-18201736513ND
2013-12-18201730999ND
2013-12-18201749510ND
2013-12-19201743006ND
2013-12-19201742791ND
2013-12-20201742933ND
2013-12-20201762654ND
2013-12-20201745711ND
2013-12-20201743231ND
2013-12-26201743010ND
2013-12-26201734010ND
2013-12-26201747678ND
2014-01-02201766626ND
2014-01-02201761171ND
2014-01-06201761181ND
2014-01-06201761349ND
2014-01-08201761177ND
2014-01-08201766202ND
2014-01-08201766049ND
2014-01-08201766613ND
2014-01-16201768866ND
2014-01-16201766624ND
2014-01-17201761167ND
2014-01-17201766595ND
2014-01-17201766589ND
2014-01-17201766601ND
2014-01-172017666071.20 ppb
2014-01-23201764359ND
2014-01-23201761179ND
2014-01-23201763419ND
2014-01-24201761173ND
2014-01-24201765722ND
2014-01-24201761224ND
2014-01-28201761169ND
2014-01-28201766625ND
2014-01-29201761175ND
2014-01-29201763320ND
2014-01-29201763984ND
2014-01-30201774168ND
2014-02-05201772892ND
2014-02-05201772886ND
2014-02-05201774800ND
2014-02-05201774770ND
2014-02-05201774764ND
2014-02-06201772904ND
2014-02-06201772888ND
2014-02-06201774794ND
2014-02-06201774758ND
2014-02-07201772900ND
2014-02-07201772890ND
2014-02-07201774782ND
2014-02-07201774752ND
2014-02-14201774740ND
2014-02-14201772898ND
2014-02-14201772896ND
2014-02-14201774734ND
2014-02-19201772894ND
2014-02-19201774746ND
2014-02-19201776387ND
2014-02-20201772906ND
2014-02-20201774806ND
2014-02-21201772902ND
2014-02-21201772911ND
2014-02-21201772908ND
2014-02-21201774776ND
2014-02-21201774788ND
2014-02-21201774812ND
2014-02-26201790532ND
2014-03-05201785481ND
2014-03-05201790689ND
2014-03-05201790653ND
2014-03-05201790593ND
2014-03-06201785483ND
2014-03-06201785477ND
2014-03-06201790647ND
2014-03-06201790641ND
2014-03-07201785479ND
2014-03-07201790581ND
2014-03-07201790587ND
2014-03-12201785487ND
2014-03-12201790599ND
2014-03-13201785485ND
2014-03-13201790623ND
2014-03-14201790677ND
2014-03-14201785473ND
2014-03-20201790665ND
2014-03-20201790671ND
2014-03-20201785469ND
2014-03-20201785467ND
2014-03-21201785475ND
2014-03-21201790635ND
2014-03-21201790617ND
2014-03-21201790629ND
2014-03-21201790659ND
2014-03-24201785489ND
2014-03-24201790611ND
2014-03-27201785463ND
2014-04-03201804969ND
2014-04-03201804975ND
2014-04-03201798593ND
2014-04-04201804967ND
2014-04-04201804453ND
2014-04-04201803888ND
2014-04-04201804952ND
2014-04-08201798605ND
2014-04-08201798750ND
2014-04-08201800579ND
2014-04-09201798589AND
2014-04-09201804961ND
2014-04-10201804955ND
2014-04-10201798597ND
2014-04-10201798583ND
2014-04-10201804923ND
2014-04-15201798587ND
2014-04-15201803833ND
2014-04-15201804933ND
2014-04-15201804939ND
2014-04-15201800391ND
2014-04-17201790605ND
2014-04-22201798601ND
2014-04-22201804945ND
2014-04-22201800429ND
2014-04-22201800435ND
2014-04-23201800717ND
2014-04-23201805143ND
2014-04-24201798591ND
2014-04-24201800748ND
2014-04-24201800544ND
2014-04-25201798599ND
2014-04-25201805008ND
2014-04-25201800510ND
2014-04-29201798603ND
2014-04-29201803955ND
2014-04-29201800563ND
2014-05-01201823042ND
2014-05-01201815806ND
2014-05-01201821643ND
2014-05-012018175431.22 ppb
2014-05-01201822188ND
2014-05-02201823020ND
2014-05-02201815800ND
2014-05-02201821571ND
2014-05-02201822052ND
2014-05-07201822253ND
2014-05-07201815804ND
2014-05-08201824188ND
2014-05-08201815921ND
2014-05-08201823040ND
2014-05-08201798595ND
2014-05-08201828669ND
2014-05-08201828671ND
2014-05-08201828673ND
2014-05-09201828675ND
2014-05-092018286771.37 ppb
2014-05-09201815802ND
2014-05-09201815913ND
2014-05-092018286791.06 ppb
2014-05-12201829414ND
2014-05-12201829418ND
2014-05-12201829422ND
2014-05-122018294201.76 ppb
2014-05-12201829374ND
2014-05-122018294162.11 ppb
2014-05-14201823048ND
2014-05-14201822143ND
2014-05-14201818879ND
2014-05-14201823054ND
2014-05-14201823059ND
2014-05-14201823057ND
2014-05-15201819113ND
2014-05-15201823022ND
2014-05-15201823034ND
2014-05-15201823028ND
2014-05-15201785471ND
2014-05-15201815798ND
2014-05-15201822602ND
2014-05-16201815808ND
2014-05-16201822033ND
2014-05-16201818011ND
2014-05-16201823014ND
2014-05-19201829342ND
2014-05-19201829343ND
2014-05-20201804981ND
2014-05-20201830439ND
2014-05-21201804987ND
2014-05-22201832882ND
2014-05-28201823006ND
2014-05-28201823012ND
2014-05-29201839154ND
2014-06-04201838962ND
2014-06-04201838935ND
2014-06-11201790533ND
2014-06-11201790569ND
2014-06-11201829424ND
2014-06-17201847014ND
2014-06-24201847766ND
2014-06-24201848118ND
2014-07-02201849075ND
2014-07-02201854657ND
2014-07-02201853415ND
2014-07-02201854662ND
2014-07-03201849079ND
2014-07-03201851206ND
2014-07-032018591291.09 ppb
2014-07-10201854628ND
2014-07-10201849247ND
2014-07-11201804953ND
2014-07-11201849069ND
2014-07-11201853502ND
2014-07-11201800503ND
2014-07-18201854567ND
2014-07-18201849077ND
2014-07-18201852887ND
2014-07-24201849067ND
2014-07-242018544337.49 ppb
2014-07-24201854475ND
2014-07-24201854481ND
2014-07-24201854487ND
2014-07-30201849861ND
2014-07-30201837980ND
2014-07-30201850158ND
2014-08-01201861504ND
2014-08-01201861510ND
2014-08-01201862584ND
2014-08-01201862632ND
2014-08-01201862578ND
2014-08-05201861506ND
2014-08-05201861530ND
2014-08-06201861522ND
2014-08-06201861508ND
2014-08-06201862614ND
2014-08-06201862572ND
2014-08-08201861520ND
2014-08-08201849073ND
2014-08-08201854508ND
2014-08-08201849108ND
2014-08-08201862644ND
2014-08-13201862566ND
2014-08-13201861516ND
2014-08-13201862560ND
2014-08-15201861524ND
2014-08-15201861512ND
2014-08-15201862608ND
2014-08-15201862638ND
2014-08-19201870701ND
2014-08-19201869060ND
2014-08-20201861528ND
2014-08-20201861526ND
2014-08-20201862626ND
2014-08-20201862620ND
2014-08-22201861518ND
2014-08-22201840988ND
2014-08-22201862602ND
2014-09-03201883632ND
2014-09-03201888565ND
2014-09-03201883924ND
2014-09-03201888499ND
2014-09-05201862596ND
2014-09-05201883630ND
2014-09-05201861514ND
2014-09-05201888487ND
2014-09-05201888493ND
2014-09-08201883633ND
2014-09-08201883628ND
2014-09-08201888559ND
2014-09-08201888553ND
2014-09-09201883639ND
2014-09-09201888523ND
2014-09-10201883637ND
2014-09-10201715559ND
2014-09-10201888517ND
2014-09-10201888511ND
2014-09-10201720879ND
2014-09-12201883626ND
2014-09-12201888547ND
2014-09-12201888811ND
2014-09-12201888541ND
2014-09-12201888529ND
2014-09-15201883635ND
2014-09-15201888505ND
2014-09-16201898450ND
2014-09-16201896970ND
2014-09-16201898393ND
2014-09-17201883616ND
2014-09-17201884502ND
2014-09-17201888864ND
2014-09-172018884751.24 ppb
2014-09-17201888457ND
2014-09-17201888451ND
2014-09-23201883622ND
2014-09-23201888573ND
2014-09-24201888567ND
2014-09-24201888022ND
2014-09-24201899144ND
2014-09-24201883618ND
2014-09-24201883620ND
2014-09-24201900233ND
2014-09-26201898448ND
2014-09-26201896976ND
2014-09-26201885197ND
2014-09-26201883624ND
2014-09-26201898462ND
2014-09-26201898456ND
2014-10-01201883614ND
2014-10-01201888481ND
2014-10-01201888445ND
2014-10-01201907992ND
2014-10-01201899130ND
2014-10-012019030931.90 ppb
2014-10-012019079801.11 ppb
2014-10-01201888463ND
2014-10-01201888439ND
2014-10-06201849197ND
2014-10-06201848217ND
2014-10-06201899142ND
2014-10-09201907986ND
2014-10-10201899146ND
2014-10-10201908030ND
2014-10-10201888783ND
2014-10-10201903192ND
2014-10-10201904986ND
2014-10-10201908009ND
2014-10-10201908002ND
2014-10-15201899136ND
2014-10-15201900124ND
2014-10-15201908052ND
2014-10-17201899148ND
2014-10-17201906923ND
2014-10-17201905129ND
2014-10-20201908018ND
2014-10-20201905396ND
2014-10-20201899128ND
2014-10-24201908050ND
2014-10-24201907612ND
2014-10-24201908024ND
2014-10-24201899134ND
2014-10-27201920419ND
2014-10-29201908032ND
2014-10-29201908038ND
2014-10-29201908044ND
2014-10-29201899138ND
2014-10-30201920788ND
2014-10-30201919213ND
2014-10-30201920794ND
2014-10-30201920797ND
2014-10-31201899132ND
2014-10-31201907996ND
2014-10-31201904371ND
2014-10-31201904945ND
2014-10-31201924495ND
2014-10-312019244891.59 ppb
2014-11-04201920754ND
2014-11-04201916875ND
2014-11-04201920742ND
2014-11-04201920736ND
2014-11-05201920782ND
2014-11-05201916881ND
2014-11-05201920776ND
2014-11-05201917386ND
2014-11-05201920716ND
2014-11-07201916883ND
2014-11-07201920730ND
2014-11-07201901786ND
2014-11-10201926831ND
2014-11-10201914153ND
2014-11-12201920748ND
2014-11-12201916879ND
2014-11-14201920019ND
2014-11-14201920774ND
2014-11-14201916877ND
2014-11-14201920012ND
2014-11-18201922192ND
2014-11-18201922992ND
2014-11-20201920768ND
2014-11-20201920756ND
2014-11-20201920762ND
2014-11-20201916873ND
2014-11-21201920722ND
2014-11-21201920728ND
2014-12-01201932526ND
2014-12-01201938577ND
2015-05-13202006896ND
2015-05-13202006894ND
2015-06-09202029922ND
2015-06-09202029926ND
2015-06-09202029373ND
2015-06-09201995729ND
2015-06-09202029502ND
2015-06-09202029512ND
2015-06-09202029690ND
2015-06-09202029495ND
2015-07-27202051941ND
2015-07-272020519352.18 ppb
2015-09-152020715395.19 ppb
2015-09-15202080922ND