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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

Cliffdale West

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

 

99

Samples

0

Samples exceeding legal limit (MCL)

82

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.103 ppb9982ND - 1.90 ppb
2015N/A00N/A
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
2014-03-10201403110248AMND
2014-03-10201403110492AM0.0990 ppb
2014-03-10201403110485AM0.170 ppb
2014-03-10201403110323AM0.150 ppb
2014-03-11201403120601AMND
2014-03-11201403120770AMND
2014-03-11201403121138AM0.830 ppb
2014-03-11201403120774AM0.0530 ppb
2014-03-12201403130416AM0.0370 ppb
2014-03-12201403130414AMND
2014-03-12201403130412AMND
2014-03-13201403130209AM0.0300 ppb
2014-03-13201403140275AMND
2014-03-13201403140170AM0.0680 ppb
2014-03-13201403140164AM0.160 ppb
2014-03-17201403180227AM0.330 ppb
2014-03-17201403180203AM0.0750 ppb
2014-03-17201403180201AM0.0830 ppb
2014-03-18201403190659AM0.0300 ppb
2014-03-18201403190653AMND
2014-03-18201403190634AM0.0800 ppb
2014-03-18201403190651AM0.0980 ppb
2014-03-18201403190640AM0.0650 ppb
2014-03-18201403190657AM0.0440 ppb
2014-03-18201403190705AM0.0570 ppb
2014-03-19201403200250AM0.0680 ppb
2014-03-19201403200273AM0.0750 ppb
2014-03-24201403250156AM0.0380 ppb
2014-03-25201403260283AM0.0410 ppb
2014-03-25201403260356AM0.0480 ppb
2014-03-25201403260307AM0.0410 ppb
2014-03-25201403260305AM0.0590 ppb
2014-03-31201404010144AMND
2014-03-31201404010147AM1.90 ppb
2014-03-31201404010170AMND
2014-04-08201404090604AM0.290 ppb
2014-04-08201404090599AMND
2014-04-08201404090755AM0.0750 ppb
2014-04-08201404090616AM0.0370 ppb
2014-04-09201404100643AM0.130 ppb
2014-04-09201404100654AMND
2014-04-09201404100603AM0.0700 ppb
2014-04-09201404100673AM0.0610 ppb
2014-04-09201404100632AM0.0900 ppb
2014-04-30201405020280AM0.0630 ppb
2014-04-30201405020282AM0.110 ppb
2014-04-30201405020286AMND
2014-09-09201409110337AM0.0300 ppb
2014-09-09201409100887AM0.0460 ppb
2014-09-09201409100869AM0.0700 ppb
2014-09-09201409100871AM0.130 ppb
2014-09-09201409101002AM0.270 ppb
2014-09-09201409100817AM0.0440 ppb
2014-09-09201409100791AM0.0820 ppb
2014-09-09201409110315AM0.0300 ppb
2014-09-10201409110653AM0.170 ppb
2014-09-10201409110838AM0.0410 ppb
2014-09-10201409110637AM0.110 ppb
2014-09-10201409110899AMND
2014-09-10201409110590AM0.180 ppb
2014-09-10201409110661AM0.0550 ppb
2014-09-10201409110794AM0.210 ppb
2014-09-11201409120590AM0.0650 ppb
2014-09-11201409120582AM0.120 ppb
2014-09-11201409120829AM0.0470 ppb
2014-09-15201409180321AM0.0530 ppb
2014-09-16201409170728AM0.0580 ppb
2014-09-17201409190284AM0.320 ppb
2014-09-17201409190313AM0.0440 ppb
2014-09-17201409190242AM0.220 ppb
2014-09-17201409180633AMND
2014-09-18201409190466AM0.0540 ppb
2014-09-18201409190399AM0.0670 ppb
2014-09-18201409190404AM0.0700 ppb
2014-09-18201409190445AMND
2014-09-18201409190458AMND
2014-09-24201409250578AM0.0580 ppb
2014-09-24201409250533AM0.120 ppb
2014-09-24201409250576AM0.0330 ppb
2014-09-24201409250521AM0.0310 ppb
2014-09-24201409250580AM0.0960 ppb
2014-09-24201409250508AM0.110 ppb
2014-09-24201409250585AM0.0510 ppb
2014-09-24201409250523AM0.0980 ppb
2014-09-24201409250527AM0.110 ppb
2014-09-25201409260392AM0.0850 ppb
2014-09-25201409260381AM0.150 ppb
2014-09-25201409260338AM0.0700 ppb
2014-09-25201409260378AM0.0990 ppb
2014-09-25201409260358AM0.180 ppb
2014-09-25201409260369AM0.0750 ppb
2014-09-25201409260342AM0.120 ppb
2014-09-25201409260496AM0.110 ppb
2014-10-29201410300236AMND
2014-10-29201410300238AM0.0660 ppb
2014-11-13201411150162AM0.0890 ppb
2014-11-13201411150159AM0.0820 ppb
2014-11-13201411150160AM0.0740 ppb
2014-11-13201411150164AM0.0610 ppb