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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

San Jose Water Company

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

 

160

Samples

0

Samples exceeding legal limit (MCL)

145

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20131.25 ppb30300.0600 ppb - 5.10 ppb
20141.58 ppb35350.0800 ppb - 5.00 ppb
20151.97 ppb2320ND - 6.60 ppb
20162.57 ppb6154ND - 5.80 ppb
20172.06 ppb96ND - 4.50 ppb
2018ND10ND
2019ND10ND

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
2013-08-0528720780.0700 ppb
2013-08-0528719851.10 ppb
2013-08-0528720183.40 ppb
2013-08-0528720012.50 ppb
2013-08-0528720520.1000 ppb
2013-08-1228779130.0600 ppb
2013-08-1228766500.0800 ppb
2013-08-1228766540.0600 ppb
2013-08-1228768170.140 ppb
2013-08-1228768112.90 ppb
2013-08-1228766581.20 ppb
2013-08-1928822840.160 ppb
2013-08-1928822132.00 ppb
2013-08-1928822601.40 ppb
2013-08-2628863282.80 ppb
2013-08-2628863494.80 ppb
2013-08-2628863604.30 ppb
2013-08-2728869390.380 ppb
2013-08-2928891420.370 ppb
2013-08-2928891445.10 ppb
2013-09-1128962322.20 ppb
2013-09-1128962311.60 ppb
2013-11-0629276080.0800 ppb
2013-11-0629276540.130 ppb
2013-11-0629276300.0900 ppb
2013-11-0629275840.0700 ppb
2013-11-0629275800.0900 ppb
2013-11-0629275920.0900 ppb
2013-11-0629275880.0800 ppb
2013-11-0629276190.0900 ppb
2014-02-0529707900.410 ppb
2014-02-0729707090.0800 ppb
2014-02-0729707690.900 ppb
2014-02-0729707451.80 ppb
2014-02-0729707251.50 ppb
2014-02-0729706430.1000 ppb
2014-02-0729706220.570 ppb
2014-02-0729706290.120 ppb
2014-02-0729706010.170 ppb
2014-02-0729706690.0900 ppb
2014-02-0729706922.80 ppb
2014-02-1029734892.10 ppb
2014-02-1029735455.00 ppb
2014-02-1029733642.60 ppb
2014-02-1029735543.50 ppb
2014-02-1029735223.00 ppb
2014-02-1029734644.90 ppb
2014-02-1029735094.20 ppb
2014-02-1029735602.80 ppb
2014-02-1029733140.920 ppb
2014-03-1829945030.380 ppb
2014-05-0530206540.120 ppb
2014-05-0530206390.540 ppb
2014-05-0530206280.120 ppb
2014-05-0730223880.490 ppb
2014-05-0730223662.00 ppb
2014-05-0930259830.110 ppb
2014-05-0930259290.430 ppb
2014-06-1830530430.0800 ppb
2014-07-161610-136-10071.60 ppb
2014-07-161610-137-10101.80 ppb
2014-07-171610-182-10003.10 ppb
2014-07-181610-184-08253.00 ppb
2014-09-191610-186-08302.10 ppb
2014-09-191610-187-09101.90 ppb
2015-01-071610-108-11403.00 ppb
2015-01-071610-175-11403.00 ppb
2015-01-161610-074-1015ND
2015-02-2331952980.130 ppb
2015-02-2331952960.0900 ppb
2015-03-031610-112-11056.60 ppb
2015-03-041610-024-11201.70 ppb
2015-03-051610-156-09222.00 ppb
2015-03-111610-125-09251.40 ppb
2015-03-121610-180-10062.20 ppb
2015-03-121610-183-12154.40 ppb
2015-04-081610-181-09153.10 ppb
2015-04-131610-016-0930ND
2015-05-141610-128-08461.20 ppb
2015-05-141610-130-09181.40 ppb
2015-06-031610-134-10221.70 ppb
2015-07-161610-116-0900ND
2015-08-051610-072-11002.00 ppb
2015-08-131610-029-10202.90 ppb
2015-08-261610-156-11202.20 ppb
2015-09-021610-111-08402.40 ppb
2015-09-241610-090-11452.80 ppb
2015-10-201610-126-08401.10 ppb
2016-01-071644-185-09551.40 ppb
2016-01-071644-186-09331.80 ppb
2016-01-121610-187-14102.10 ppb
2016-02-041610-107-10244.40 ppb
2016-02-041610-131-11301.20 ppb
2016-02-081610-142-09262.80 ppb
2016-02-081610-143-09352.70 ppb
2016-02-111610-004-09102.40 ppb
2016-02-181610-117-12024.70 ppb
2016-02-221610-031-08463.70 ppb
2016-02-221610-034-09102.30 ppb
2016-02-221610-068-09551.90 ppb
2016-02-231610-025-09002.40 ppb
2016-02-231610-085-1100ND
2016-02-241610-135-1055ND
2016-02-241610-137-11321.80 ppb
2016-02-241610-186-11502.00 ppb
2016-02-251610-005-12302.40 ppb
2016-03-011610-070-10152.10 ppb
2016-03-011610-101-09201.40 ppb
2016-03-021610-093-09552.40 ppb
2016-03-021610-118-13503.30 ppb
2016-03-031610-088-08555.20 ppb
2016-03-171610-168-09302.90 ppb
2016-03-171610-176-11054.10 ppb
2016-03-281610-022-13302.60 ppb
2016-03-281610-129-12101.60 ppb
2016-03-281610-177-0940ND
2016-04-141610-184-08302.60 ppb
2016-05-041233-198-12004.30 ppb
2016-05-241610-075-1130ND
2016-06-081610-086-08273.50 ppb
2016-06-091610-109-09554.10 ppb
2016-06-101610-002-10002.90 ppb
2016-06-101610-003-10263.60 ppb
2016-06-101610-113-10445.80 ppb
2016-06-101610-172-10265.10 ppb
2016-06-131610-138-09401.80 ppb
2016-06-141610-023-08152.40 ppb
2016-06-141610-027-08401.80 ppb
2016-06-141610-030-09151.50 ppb
2016-06-141610-092-10152.30 ppb
2016-06-141610-169-09502.00 ppb
2016-06-151610-140-11151.40 ppb
2016-06-151610-141-10201.40 ppb
2016-06-151610-144-10301.80 ppb
2016-06-151610-178-09105.60 ppb
2016-06-151610-179-09255.50 ppb
2016-06-151233-199-1300ND
2016-06-161610-170-11004.30 ppb
2016-06-161610-171-10454.20 ppb
2016-06-161610-173-0933ND
2016-06-201610-093-10201.70 ppb
2016-06-201610-102-09151.10 ppb
2016-06-231610-067-11001.90 ppb
2016-07-261233-198-12304.80 ppb
2016-08-251233-194-12004.80 ppb
2016-10-031233-196-11003.90 ppb
2016-12-011610-094-12052.50 ppb
2016-12-151610-133-1210ND
2016-12-151233-195-12002.70 ppb
2017-01-111610-108-09474.50 ppb
2017-01-181610-085-1318ND
2017-01-311610-169-08051.70 ppb
2017-02-011610-173-1355ND
2017-03-281610-110-11303.60 ppb
2017-03-291610-033-08303.90 ppb
2017-05-101610-003-08403.70 ppb
2017-06-291610-136-10001.10 ppb
2017-12-201610-901-1025ND
2018-01-171610-074-1305ND
2019-01-291610-074-0815ND