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EWG's Tap Water Database — 2021 UPDATE

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Cobalt

Bayleaf Master

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

 

233

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.106 ppb1185ND - 7.40 ppb
20150.0983 ppb1154ND - 7.20 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
2014-09-08201409101000AMND
2014-09-08201409090419AMND
2014-09-08201409090404AMND
2014-09-08201409090438AMND
2014-09-08201409100867AMND
2014-09-08201409100785AMND
2014-09-08201409100862AMND
2014-09-08201409110309AMND
2014-09-08201409090509AMND
2014-09-08201409090398AMND
2014-09-08201409101010AMND
2014-09-10201409110836AMND
2014-09-10201409110641AMND
2014-09-10201409110842AMND
2014-09-10201409110623AMND
2014-09-10201409120792AMND
2014-09-10201409110611AMND
2014-09-10201409120849AMND
2014-09-10201409110733AMND
2014-09-10201409120846AM1.40 ppb
2014-09-11201409120824AMND
2014-09-11201409120556AMND
2014-09-11201409120586AMND
2014-09-11201409120566AMND
2014-09-11201409120561AMND
2014-09-15201409160528AMND
2014-09-15201409160512AMND
2014-09-15201409170392AM1.20 ppb
2014-09-15201409160641AMND
2014-09-15201409160280AMND
2014-09-15201409160643AMND
2014-09-15201409160517AMND
2014-09-15201409160409AMND
2014-09-15201409170410AMND
2014-09-15201409170404AMND
2014-09-16201409180294AMND
2014-09-16201409170769AM7.40 ppb
2014-09-16201409180308AMND
2014-09-16201409170773AMND
2014-09-16201409180359AMND
2014-09-16201409180283AMND
2014-09-16201409170859AMND
2014-09-17201409180747AMND
2014-09-17201409180597AMND
2014-09-17201409180629AMND
2014-09-17201409180637AMND
2014-09-17201409190240AMND
2014-09-17201409190322AMND
2014-09-17201409190298AMND
2014-09-17201409180613AMND
2014-09-17201409190308AMND
2014-09-17201409190302AMND
2014-09-17201409180617AMND
2014-09-17201409180745AMND
2014-09-17201409180731AMND
2014-09-17201409190305AMND
2014-09-18201409190437AMND
2014-09-18201409190422AMND
2014-09-18201409190468AMND
2014-09-18201409190443AMND
2014-09-18201409190451AMND
2014-09-18201409190433AMND
2014-09-18201409190431AMND
2014-09-22201409230393AMND
2014-09-22201409230403AMND
2014-09-22201409230540AMND
2014-09-22201409230171AMND
2014-09-22201409230411AMND
2014-09-22201409230358AMND
2014-09-22201409230408AMND
2014-09-22201409230330AMND
2014-09-22201409230349AMND
2014-09-22201409230354AMND
2014-09-22201409230206AMND
2014-09-23201409240562AMND
2014-09-23201409240435AMND
2014-09-23201409240366AMND
2014-09-23201409240473AMND
2014-09-23201409240461AMND
2014-09-23201409240424AMND
2014-09-23201409240383AMND
2014-09-23201409240422AMND
2014-09-23201409240488AMND
2014-09-23201409240506AM1.40 ppb
2014-09-24201409250539AMND
2014-09-24201409250492AM1.10 ppb
2014-09-24201409250594AMND
2014-09-24201409250589AMND
2014-09-24201409250494AMND
2014-09-24201409250629AMND
2014-09-24201409250601AMND
2014-09-24201409250487AMND
2014-09-24201409250506AMND
2014-09-24201409250633AMND
2014-09-24201409250599AMND
2014-09-24201409250623AMND
2014-09-24201409250619AMND
2014-09-24201409250587AMND
2014-09-24201409250627AMND
2014-10-22201410230493AMND
2014-10-22201410230342AMND
2014-10-22201410230275AMND
2014-10-22201410230321AMND
2014-10-22201410230327AMND
2014-10-22201410230435AMND
2014-10-22201410230283AMND
2014-10-22201410230491AMND
2014-10-23201410240152AMND
2014-10-23201410240192AMND
2014-10-28201410290232AMND
2014-10-28201410290225AMND
2014-10-28201410290230AMND
2014-10-28201410290234AMND
2014-10-28201410290228AMND
2014-10-28201410290374AMND
2014-10-29201410300247AMND
2014-10-29201410300244AMND
2014-10-29201410300253AMND
2015-03-02201503030745AMND
2015-03-02201503030747AMND
2015-03-02201503030260AMND
2015-03-02201503030753AMND
2015-03-02201503030313AMND
2015-03-02201503030262AMND
2015-03-02201503030398AMND
2015-03-02201503030421AM1.60 ppb
2015-03-03201503040340AMND
2015-03-03201503040347AMND
2015-03-03201503040447AMND
2015-03-03201503040312AMND
2015-03-03201503040382AMND
2015-03-03201503040756AMND
2015-03-03201503040753AMND
2015-03-03201503040772AMND
2015-03-03201503040768AMND
2015-03-03201503040430AMND
2015-03-03201503040385AMND
2015-03-03201503040468AMND
2015-03-04201503050520AMND
2015-03-04201503050466AMND
2015-03-04201503050451AMND
2015-03-04201503050468AMND
2015-03-04201503050481AMND
2015-03-04201503050555AMND
2015-03-04201503050477AMND
2015-03-04201503050479AMND
2015-03-05201503060133AMND
2015-03-05201503060336AMND
2015-03-05201503060180AMND
2015-03-05201503060339AMND
2015-03-05201503060334AMND
2015-03-05201503060186AMND
2015-03-05201503060315AMND
2015-03-05201503060182AMND
2015-03-09201503100534AMND
2015-03-09201503110233AMND
2015-03-09201503110200AMND
2015-03-09201503100899AMND
2015-03-09201503100583AMND
2015-03-09201503110239AMND
2015-03-09201503100581AMND
2015-03-09201503100585AM7.20 ppb
2015-03-09201503100901AMND
2015-03-09201503100601AMND
2015-03-09201503110210AMND
2015-03-09201503100919AMND
2015-03-10201503110880AMND
2015-03-10201503110874AMND
2015-03-10201503120188AM1.000 ppb
2015-03-10201503120191AMND
2015-03-10201503120234AMND
2015-03-10201503110945AMND
2015-03-10201503120240AMND
2015-03-10201503120238AMND
2015-03-10201503120185AMND
2015-03-10201503120242AMND
2015-03-10201503110872AMND
2015-03-10201503110931AMND
2015-03-11201503130153AMND
2015-03-11201503130171AMND
2015-03-11201503130173AMND
2015-03-11201503120554AMND
2015-03-11201503130131AMND
2015-03-11201503130148AMND
2015-03-11201503130143AMND
2015-03-11201503130166AMND
2015-03-11201503130164AMND
2015-03-12201503140176AMND
2015-03-12201503140204AMND
2015-03-12201503140206AMND
2015-03-12201503140179AMND
2015-03-12201503140187AMND
2015-03-12201503130169AMND
2015-03-12201503140191AMND
2015-03-12201503140202AMND
2015-03-12201503140172AMND
2015-03-12201503140189AMND
2015-03-12201503140197AMND
2015-03-16201503170673AMND
2015-03-16201503170735AMND
2015-03-16201503170561AM1.50 ppb
2015-03-16201503170490AMND
2015-03-16201503170715AMND
2015-03-16201503170717AMND
2015-03-16201503170675AMND
2015-03-16201503170540AMND
2015-03-16201503170679AMND
2015-03-16201503170719AMND
2015-03-16201503170523AMND
2015-03-17201503180515AMND
2015-03-17201503180830AMND
2015-03-17201503180484AMND
2015-03-17201503180738AMND
2015-03-17201503180528AMND
2015-03-17201503180548AMND
2015-03-17201503180446AMND
2015-03-17201503180461AMND
2015-03-17201503180467AMND
2015-03-17201503180736AMND
2015-03-17201503180819AMND
2015-03-17201503180519AMND
2015-03-18201503190491AMND
2015-03-18201503190562AMND
2015-03-18201503190489AMND
2015-03-18201503190548AMND
2015-03-18201503190524AMND
2015-03-18201503190508AMND
2015-03-24201503250413AMND
2015-03-24201503250532AMND
2015-03-30201503160248AMND
2015-03-30201503160246AMND
2015-03-30201503160250AMND
2015-03-30201503160249AMND