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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

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Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

MORE ABOUT THIS CONTAMINANT

 

234

Samples

0

Samples exceeding legal limit (MCL)

165

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.571 ppb11885ND - 9.10 ppb
20150.642 ppb11680ND - 11.0 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 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) 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 cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-09-08201409101000AM0.220 ppb
2014-09-08201409090419AM0.390 ppb
2014-09-08201409090404AM2.20 ppb
2014-09-08201409090438AMND
2014-09-08201409100867AMND
2014-09-08201409100785AM1.80 ppb
2014-09-08201409100862AMND
2014-09-08201409110309AMND
2014-09-08201409090509AM0.130 ppb
2014-09-08201409090398AM0.0600 ppb
2014-09-08201409101010AMND
2014-09-10201409110836AM0.710 ppb
2014-09-10201409110641AM1.10 ppb
2014-09-10201409110623AM0.340 ppb
2014-09-10201409120792AM0.340 ppb
2014-09-10201409120786AM1.50 ppb
2014-09-10201409110611AM0.340 ppb
2014-09-10201409120849AMND
2014-09-10201409110733AM0.170 ppb
2014-09-10201409120846AMND
2014-09-11201409120824AM0.160 ppb
2014-09-11201409120556AM1.20 ppb
2014-09-11201409120586AMND
2014-09-11201409120566AMND
2014-09-11201409120561AM0.0480 ppb
2014-09-15201409160528AM0.0950 ppb
2014-09-15201409160508AM1.10 ppb
2014-09-15201409160512AM0.980 ppb
2014-09-15201409170402AM1.40 ppb
2014-09-15201409170392AMND
2014-09-15201409160530AMND
2014-09-15201409160641AM0.580 ppb
2014-09-15201409160280AMND
2014-09-15201409170400AMND
2014-09-15201409160643AM0.450 ppb
2014-09-15201409160517AM0.1000 ppb
2014-09-15201409160409AM0.1000 ppb
2014-09-15201409170410AM0.320 ppb
2014-09-15201409170404AM0.0790 ppb
2014-09-16201409180294AM0.0310 ppb
2014-09-16201409170796AMND
2014-09-16201409170851AMND
2014-09-16201409170769AM0.0590 ppb
2014-09-16201409180308AM3.20 ppb
2014-09-16201409170773AM9.10 ppb
2014-09-16201409180359AM0.0300 ppb
2014-09-16201409180283AMND
2014-09-16201409180287AM0.0490 ppb
2014-09-16201409170859AMND
2014-09-17201409180747AM1.30 ppb
2014-09-17201409180597AM0.210 ppb
2014-09-17201409180629AM0.0430 ppb
2014-09-17201409180637AM0.740 ppb
2014-09-17201409190240AM0.470 ppb
2014-09-17201409190322AMND
2014-09-17201409190298AMND
2014-09-17201409180613AM0.190 ppb
2014-09-17201409190302AM1.50 ppb
2014-09-17201409180617AM1.000 ppb
2014-09-17201409190308AM0.0400 ppb
2014-09-17201409180745AM0.0710 ppb
2014-09-17201409180731AM1.50 ppb
2014-09-17201409180622AM0.1000 ppb
2014-09-17201409190305AMND
2014-09-18201409190439AM2.80 ppb
2014-09-18201409190447AM0.320 ppb
2014-09-18201409190441AM1.30 ppb
2014-09-18201409190454AM0.120 ppb
2014-09-18201409190437AMND
2014-09-18201409190425AMND
2014-09-18201409190422AM0.0330 ppb
2014-09-18201409190468AM0.290 ppb
2014-09-18201409190321AM1.10 ppb
2014-09-18201409190443AM2.20 ppb
2014-09-18201409190435AM0.380 ppb
2014-09-18201409190451AM0.160 ppb
2014-09-18201409190449AM2.00 ppb
2014-09-18201409190433AMND
2014-09-18201409190431AM0.0310 ppb
2014-09-18201409190460AM0.650 ppb
2014-09-22201409230403AM0.800 ppb
2014-09-22201409230393AM0.630 ppb
2014-09-22201409230540AMND
2014-09-22201409230171AMND
2014-09-22201409230391AM0.460 ppb
2014-09-22201409230411AM0.140 ppb
2014-09-22201409230358AM1.10 ppb
2014-09-22201409230408AM2.70 ppb
2014-09-22201409230330AM0.310 ppb
2014-09-22201409230349AM0.220 ppb
2014-09-22201409230354AM0.880 ppb
2014-09-22201409230206AM0.430 ppb
2014-09-23201409240562AM0.0640 ppb
2014-09-23201409240435AM0.0410 ppb
2014-09-23201409240473AM0.0320 ppb
2014-09-23201409240549AMND
2014-09-23201409240366AMND
2014-09-23201409240461AMND
2014-09-23201409240424AM0.470 ppb
2014-09-23201409240422AM0.250 ppb
2014-09-23201409240488AM1.20 ppb
2014-09-23201409240383AM0.730 ppb
2014-09-23201409240506AMND
2014-09-24201409250539AM0.960 ppb
2014-09-24201409250594AM0.360 ppb
2014-09-24201409250589AM0.250 ppb
2014-09-24201409250494AM2.50 ppb
2014-09-24201409250629AMND
2014-09-24201409250601AM0.220 ppb
2014-09-24201409250487AMND
2014-09-24201409250506AM2.10 ppb
2014-09-24201409250599AMND
2014-09-24201409250623AM0.440 ppb
2014-09-24201409250633AM2.60 ppb
2014-09-24201409250619AM0.380 ppb
2014-09-24201409250587AMND
2014-09-24201409250627AM0.0540 ppb
2014-10-28201410290223AM0.180 ppb
2015-03-02201503030747AM0.0350 ppb
2015-03-02201503030260AM0.0490 ppb
2015-03-02201503030313AMND
2015-03-02201503030421AMND
2015-03-02201503030398AM0.510 ppb
2015-03-03201503040340AMND
2015-03-03201503040347AM0.240 ppb
2015-03-03201503040447AM0.270 ppb
2015-03-03201503040312AMND
2015-03-03201503040382AM2.40 ppb
2015-03-03201503040756AM0.270 ppb
2015-03-03201503040753AM0.910 ppb
2015-03-03201503040768AM2.00 ppb
2015-03-03201503040430AMND
2015-03-03201503040772AM0.790 ppb
2015-03-03201503040385AM0.200 ppb
2015-03-04201503050520AM0.350 ppb
2015-03-04201503050466AM0.830 ppb
2015-03-04201503050451AM0.0680 ppb
2015-03-04201503050468AM1.50 ppb
2015-03-04201503050481AM1.30 ppb
2015-03-04201503050555AMND
2015-03-04201503050477AMND
2015-03-04201503050479AM0.0310 ppb
2015-03-05201503060133AM4.30 ppb
2015-03-05201503060336AMND
2015-03-05201503060339AM0.0440 ppb
2015-03-05201503060334AMND
2015-03-05201503060315AM1.50 ppb
2015-03-05201503060182AM0.250 ppb
2015-03-09201503100534AMND
2015-03-09201503110233AM0.140 ppb
2015-03-09201503110200AMND
2015-03-09201503100899AMND
2015-03-09201503100583AM1.10 ppb
2015-03-09201503110239AM11.0 ppb
2015-03-09201503100581AM3.80 ppb
2015-03-09201503100585AMND
2015-03-09201503100901AM0.710 ppb
2015-03-09201503100601AM0.220 ppb
2015-03-09201503110210AMND
2015-03-09201503100919AMND
2015-03-10201503110874AM0.390 ppb
2015-03-10201503120188AMND
2015-03-10201503120191AM0.950 ppb
2015-03-10201503120234AM0.750 ppb
2015-03-10201503110945AMND
2015-03-10201503120240AMND
2015-03-10201503120185AM1.10 ppb
2015-03-10201503120238AM0.480 ppb
2015-03-10201503110872AM0.260 ppb
2015-03-10201503120242AM0.350 ppb
2015-03-10201503110931AM0.360 ppb
2015-03-11201503130171AM1.30 ppb
2015-03-11201503130153AM0.140 ppb
2015-03-11201503130173AM0.200 ppb
2015-03-11201503120554AM0.110 ppb
2015-03-11201503130131AM0.0520 ppb
2015-03-11201503130148AMND
2015-03-11201503130143AM1.20 ppb
2015-03-11201503130166AM0.320 ppb
2015-03-11201503130164AMND
2015-03-12201503140176AM0.210 ppb
2015-03-12201503140206AM0.680 ppb
2015-03-12201503140179AMND
2015-03-12201503140187AM0.970 ppb
2015-03-12201503140204AM0.640 ppb
2015-03-12201503140191AM3.10 ppb
2015-03-12201503130169AMND
2015-03-12201503140202AMND
2015-03-12201503140172AM0.0690 ppb
2015-03-12201503140189AMND
2015-03-12201503140197AM0.0310 ppb
2015-03-16201503170673AM0.730 ppb
2015-03-16201503170670AM0.990 ppb
2015-03-16201503170735AM0.380 ppb
2015-03-16201503170561AMND
2015-03-16201503170490AM0.0890 ppb
2015-03-16201503170715AMND
2015-03-16201503170717AMND
2015-03-16201503170675AM0.280 ppb
2015-03-16201503170540AM0.480 ppb
2015-03-16201503170679AM0.270 ppb
2015-03-16201503170719AMND
2015-03-16201503170523AM0.500 ppb
2015-03-17201503180519AMND
2015-03-17201503180515AM0.720 ppb
2015-03-17201503180738AM0.560 ppb
2015-03-17201503180528AMND
2015-03-17201503180548AM3.90 ppb
2015-03-17201503180461AM0.140 ppb
2015-03-17201503180830AMND
2015-03-17201503180467AM2.90 ppb
2015-03-17201503180736AMND
2015-03-17201503180819AM0.110 ppb
2015-03-18201503190491AM0.280 ppb
2015-03-18201503190562AMND
2015-03-18201503190489AM0.110 ppb
2015-03-18201503190524AM1.30 ppb
2015-03-18201503190508AM0.120 ppb
2015-03-24201503250413AM0.210 ppb
2015-03-24201503250532AM0.330 ppb
2015-03-30201503160248AM0.330 ppb
2015-03-30201503160246AM1.50 ppb
2015-03-30201503160250AMND
2015-03-30201503160249AM0.370 ppb
2015-03-30201503160256AMND
2015-04-08201503240356AM2.40 ppb
2015-04-08201503240355AM2.60 ppb
2015-04-08201503160257AM0.260 ppb
2015-04-08201503160259AMND
2015-04-08201503160251AM2.00 ppb
2015-04-08201503160255AM0.0360 ppb
2015-04-23201504130026AM1.70 ppb
2015-04-23201504240167AM0.200 ppb
2015-04-23201504130027AM0.170 ppb