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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

San Jose Water Company

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

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226

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20131.21 ppb3015ND - 4.60 ppb
20140.606 ppb5215ND - 11.0 ppb
20150.0708 ppb242ND - 1.50 ppb
2016ND380ND
2017ND280ND
2018ND240ND
2019ND300ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2013-08-052872073ND
2013-08-0528719803.00 ppb
2013-08-0528720133.10 ppb
2013-08-0528719962.30 ppb
2013-08-052872047ND
2013-08-122876647ND
2013-08-122876651ND
2013-08-1228768082.80 ppb
2013-08-122876814ND
2013-08-1228766551.10 ppb
2013-08-1928835550.700 ppb
2013-08-1928835664.50 ppb
2013-08-192882279ND
2013-08-1928822081.90 ppb
2013-08-1928822551.30 ppb
2013-08-2628863232.60 ppb
2013-08-2628863554.40 ppb
2013-08-2628863444.60 ppb
2013-08-2728869340.700 ppb
2013-08-282889124ND
2013-09-2029027741.40 ppb
2013-09-2329027771.90 ppb
2013-11-062927603ND
2013-11-062927649ND
2013-11-062927625ND
2013-11-062927581ND
2013-11-062927577ND
2013-11-062927585ND
2013-11-062927589ND
2013-11-062927614ND
2014-01-071610-067-0905ND
2014-01-081610-136-0913ND
2014-01-131610-093-0850ND
2014-02-041610-002-0820ND
2014-02-041610-023-0915ND
2014-02-072970704ND
2014-02-0729707641.000 ppb
2014-02-0729707201.50 ppb
2014-02-0729706400.200 ppb
2014-02-0729706190.600 ppb
2014-02-072970626ND
2014-02-0729705980.200 ppb
2014-02-072970664ND
2014-02-0729706872.70 ppb
2014-02-101610-173-1355ND
2014-03-041610-113-092511.0 ppb
2014-03-0529886601.80 ppb
2014-03-0529886622.10 ppb
2014-03-061610-178-0845ND
2014-03-071610-074-1020ND
2014-03-121610-170-0900ND
2014-03-121610-171-0930ND
2014-03-1329926804.50 ppb
2014-03-1329926822.60 ppb
2014-03-171610-141-1031ND
2014-03-1829944980.400 ppb
2014-04-031610-033-1050ND
2014-04-081610-086-1055ND
2014-05-053020649ND
2014-05-0530206340.500 ppb
2014-05-053020625ND
2014-05-0730223850.500 ppb
2014-05-0730223631.90 ppb
2014-06-023037127ND
2014-06-031610-169-0815ND
2014-06-063043292ND
2014-06-063043295ND
2014-06-101610-179-0915ND
2014-06-111610-108-0950ND
2014-07-081610-133-0912ND
2014-07-101610-172-1000ND
2014-08-061610-003-0820ND
2014-08-141610-114-0845ND
2014-08-181610-109-1005ND
2014-09-231610-027-0845ND
2014-11-031610-102-0859ND
2014-11-051610-030-1230ND
2014-11-051610-094-0940ND
2014-11-121610-140-1100ND
2014-12-021610-068-1020ND
2014-12-031610-116-1250ND
2014-12-031610-138-0950ND
2015-01-071610-108-1140ND
2015-01-071610-175-1140ND
2015-01-131610-074-1108ND
2015-01-131610-085-0905ND
2015-02-1131893250.200 ppb
2015-02-1131893331.50 ppb
2015-03-031610-112-1105ND
2015-03-041610-024-1120ND
2015-03-051610-156-0922ND
2015-03-111610-125-0925ND
2015-03-121610-180-1006ND
2015-03-121610-183-1215ND
2015-04-081610-181-0915ND
2015-04-131610-016-0930ND
2015-05-141610-128-0846ND
2015-05-141610-130-0918ND
2015-06-031610-134-1022ND
2015-07-161610-116-0900ND
2015-08-051610-072-1100ND
2015-08-131610-029-1020ND
2015-08-261610-156-1120ND
2015-09-021610-111-0840ND
2015-09-241610-090-1145ND
2015-10-201610-126-0840ND
2016-01-071610-185-0955ND
2016-01-071610-186-0933ND
2016-01-121610-187-1410ND
2016-02-041610-107-1024ND
2016-02-041610-131-1130ND
2016-02-081610-142-0926ND
2016-02-081610-143-0935ND
2016-02-111610-004-0910ND
2016-02-181610-117-1202ND
2016-02-221610-031-0846ND
2016-02-221610-034-0910ND
2016-02-231610-025-0900ND
2016-02-231610-085-1100ND
2016-02-241610-135-1055ND
2016-02-241610-137-1132ND
2016-02-251610-005-1230ND
2016-03-011610-070-1015ND
2016-03-011610-101-0920ND
2016-03-021610-093-0955ND
2016-03-021610-118-1350ND
2016-03-031610-088-0855ND
2016-03-171610-168-0930ND
2016-03-171610-176-1105ND
2016-03-281610-022-1332ND
2016-03-281610-129-1210ND
2016-03-281610-177-0940ND
2016-04-141610-184-0830ND
2016-05-041233-198-1200ND
2016-05-241610-075-1130ND
2016-06-141610-092-1015ND
2016-06-151610-144-1030ND
2016-06-151233-199-1300ND
2016-06-201610-093-1020ND
2016-06-231610-067-1100ND
2016-07-261233-198-1230ND
2016-08-251233-194-1200ND
2016-10-031233-196-1100ND
2016-12-151233-195-1200ND
2017-01-111610-108-0947ND
2017-01-111610-109-1010ND
2017-01-121610-002-0830ND
2017-01-171610-023-0920ND
2017-01-171610-027-0950ND
2017-01-171610-085-1150ND
2017-01-181610-068-1055ND
2017-01-181610-172-1335ND
2017-01-261610-086-1415ND
2017-01-261610-170-1115ND
2017-01-311610-094-1215ND
2017-01-311610-169-0805ND
2017-01-311610-178-1250ND
2017-01-311610-179-1520ND
2017-02-011610-173-1355ND
2017-02-021610-138-0900ND
2017-02-081610-133-1150ND
2017-02-161610-030-1130ND
2017-02-271610-172-1335ND
2017-03-221610-102-0800ND
2017-03-231610-171-0630ND
2017-03-281610-110-1130ND
2017-03-281610-141-0830ND
2017-03-291610-033-0830ND
2017-05-101610-003-0840ND
2017-05-241610-140-1020ND
2017-06-291610-136-1000ND
2017-12-141610-074-1350ND
2018-01-091610-030-1110ND
2018-01-101610-029-0905ND
2018-01-111610-156-0940ND
2018-01-171610-074-1305ND
2018-01-181610-126-1249ND
2018-01-181610-134-1200ND
2018-01-181610-137-1154ND
2018-01-221610-085-1057ND
2018-01-241610-101-1450ND
2018-01-241610-180-1335ND
2018-01-251610-125-1130ND
2018-01-251610-128-1200ND
2018-01-251610-130-1055ND
2018-01-251610-175-1345ND
2018-01-301610-142-0940ND
2018-01-311610-090-1115ND
2018-01-311610-181-1210ND
2018-02-011610-111-1010ND
2018-02-011610-183-1220ND
2018-02-071610-112-0924ND
2018-03-061610-024-1345ND
2018-04-261610-113-1310ND
2018-08-161610-114-1107ND
2018-08-161610-116-0935ND
2019-01-141610-074-1340ND
2019-01-161610-199-0915ND
2019-01-231610-022-0910ND
2019-01-241610-025-1200ND
2019-01-241610-168-1325ND
2019-01-301610-004-0900ND
2019-01-301610-070-0950ND
2019-01-301610-185-1152ND
2019-01-311610-085-0846ND
2019-02-051610-107-0905ND
2019-02-051610-108-0923ND
2019-02-051610-178-1200ND
2019-02-071610-117-1040ND
2019-02-141610-186-0932ND
2019-02-211610-088-0935ND
2019-02-211610-131-1000ND
2019-02-211610-176-1130ND
2019-02-281610-129-0945ND
2019-02-281610-143-0945ND
2019-03-061610-135-1130ND
2019-03-061610-144-1420ND
2019-03-071610-173-1045ND
2019-03-141610-177-1135ND
2019-03-141610-187-1335ND
2019-03-211610-031-1121ND
2019-03-211610-067-1315ND
2019-03-211610-184-1017ND
2019-03-251610-034-1100ND
2019-03-261610-136-1329ND
2019-03-271610-093-1430ND