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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

California American Water Company - Parkway

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

 

198

Samples

0

Samples exceeding legal limit (MCL)

104

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.20 ppb4023ND - 9.36 ppb
20153.62 ppb2419ND - 10.8 ppb
2016N/A00N/A
20173.74 ppb177ND - 11.0 ppb
20183.35 ppb8834ND - 13.0 ppb
20195.82 ppb2921ND - 14.0 ppb

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
2014-05-065810-016-1030ND
2014-05-065810-021-1210ND
2014-05-065810-022-1225ND
2014-05-065810-023-1240ND
2014-05-075810-006-1020ND
2014-05-075810-018-1135ND
2014-05-075810-024-1100ND
2014-05-075810-026-1120ND
2014-05-085810-002-10524.10 ppb
2014-05-085810-008-10307.70 ppb
2014-05-085810-011-11327.00 ppb
2014-05-085810-014-09459.00 ppb
2014-05-085810-015-12427.20 ppb
2014-05-135810-013-13308.60 ppb
2014-12-0227680201ND
2014-12-0227679801ND
2014-12-02276794014.58 ppb
2014-12-02276795010.0500 ppb
2014-12-0227679301ND
2014-12-02276787012.59 ppb
2014-12-02276815010.0500 ppb
2014-12-02276800017.28 ppb
2014-12-03276810017.38 ppb
2014-12-03276812016.76 ppb
2014-12-03276789016.86 ppb
2014-12-03276791017.59 ppb
2014-12-04276808015.95 ppb
2014-12-04276785018.23 ppb
2014-12-04276786011.000 ppb
2014-12-04276804019.36 ppb
2014-12-16276788017.23 ppb
2014-12-16276806018.07 ppb
2014-12-17276817010.650 ppb
2014-12-17277849010.640 ppb
2014-12-181225-012-1120ND
2014-12-185810-012-1120ND
2014-12-181225-017-1347ND
2014-12-185810-017-1347ND
2014-12-181225-025-0951ND
2014-12-185810-025-0951ND
2015-03-19284768010.0900 ppb
2015-03-19284767010.250 ppb
2015-06-0929307901ND
2015-06-0929308101ND
2015-06-09293063010.260 ppb
2015-06-0929306501ND
2015-06-1129305901ND
2015-06-11293083010.0500 ppb
2015-06-17293087017.34 ppb
2015-06-17293089010.150 ppb
2015-06-17293060017.02 ppb
2015-06-17293058010.200 ppb
2015-06-18293075018.23 ppb
2015-06-18293061014.45 ppb
2015-06-18293064012.01 ppb
2015-06-182930620110.8 ppb
2015-06-182930850110.7 ppb
2015-06-18293069017.16 ppb
2015-07-28299498017.20 ppb
2015-07-28299497016.24 ppb
2015-07-28299499018.31 ppb
2015-07-28299500016.37 ppb
2015-09-17302385010.110 ppb
2015-09-1730238401ND
2017-05-081225-024-1355ND
2017-05-091225-002-09209.70 ppb
2017-05-091225-008-08259.80 ppb
2017-05-091225-011-09507.81 ppb
2017-05-091225-018-0955ND
2017-05-091225-021-1040ND
2017-05-091225-022-1055ND
2017-05-091225-023-1110ND
2017-05-091225-025-1124ND
2017-05-091225-026-1012ND
2017-05-101225-006-1015ND
2017-06-075810-015-13158.10 ppb
2017-08-151225-016-0936ND
2017-08-151225-017-1012ND
2017-10-115810-013-14407.10 ppb
2017-12-061233-014-133010.00 ppb
2017-12-271233-012-102011.0 ppb
2018-01-101225-012-11059.54 ppb
2018-02-131225-013-12158.76 ppb
2018-02-131233-013-12158.30 ppb
2018-02-131225-014-102511.4 ppb
2018-02-131233-014-102510.00 ppb
2018-02-141225-012-112310.1 ppb
2018-02-221233-050-1020ND
2018-03-121225-012-12188.98 ppb
2018-03-121225-046-1233ND
2018-03-121225-047-1235ND
2018-03-121225-051-1235ND
2018-03-121225-052-1240ND
2018-03-211225-049-1220ND
2018-03-211233-049-1220ND
2018-03-211225-050-1225ND
2018-03-211233-050-1225ND
2018-04-041225-012-11008.83 ppb
2018-04-041233-012-11008.40 ppb
2018-04-041225-014-100510.1 ppb
2018-04-041225-046-1125ND
2018-04-041233-046-1125ND
2018-04-041225-047-1130ND
2018-04-041233-047-1130ND
2018-04-041233-049-1010ND
2018-04-041225-049-1230ND
2018-04-041233-049-1230ND
2018-04-041225-050-1235ND
2018-04-041233-050-1235ND
2018-04-041225-051-1010ND
2018-04-041233-052-1015ND
2018-05-031225-012-10059.10 ppb
2018-05-031233-012-10209.30 ppb
2018-05-031225-013-09058.28 ppb
2018-05-031233-013-09108.90 ppb
2018-05-031233-014-103011.0 ppb
2018-05-031225-014-111510.0 ppb
2018-05-031225-046-1015ND
2018-05-031233-046-1035ND
2018-05-031225-047-1016ND
2018-05-031233-047-1040ND
2018-05-031225-049-0908ND
2018-05-031233-049-0930ND
2018-05-031233-050-0935ND
2018-05-031233-051-1035ND
2018-05-031225-051-1117ND
2018-05-031233-052-1040ND
2018-05-031225-052-1118ND
2018-06-181225-046-1240ND
2018-06-181225-047-1242ND
2018-06-181225-051-10401.53 ppb
2018-06-181225-052-1050ND
2018-06-191225-049-1305ND
2018-07-191233-012-104511.0 ppb
2018-07-191233-046-1100ND
2018-07-191233-047-1105ND
2018-08-081233-012-121012.0 ppb
2018-08-081233-046-12252.40 ppb
2018-08-081233-047-1230ND
2018-08-141233-013-114511.0 ppb
2018-08-141233-049-1150ND
2018-08-141233-050-1155ND
2018-09-121233-049-1335ND
2018-09-121233-050-1340ND
2018-09-181233-012-093513.0 ppb
2018-09-181233-046-09507.30 ppb
2018-09-181233-047-0955ND
2018-10-101233-012-11309.80 ppb
2018-10-101233-046-11556.20 ppb
2018-10-101233-047-1150ND
2018-10-111233-049-1210ND
2018-10-111233-050-1215ND
2018-10-231233-046-13306.50 ppb
2018-10-231233-047-1330ND
2018-10-301233-046-11115.40 ppb
2018-10-301233-047-1111ND
2018-11-061233-012-134011.0 ppb
2018-11-061233-013-144512.0 ppb
2018-11-061233-046-13556.70 ppb
2018-11-061233-047-1400ND
2018-11-061233-049-1450ND
2018-11-061233-050-1455ND
2018-12-111233-012-13209.00 ppb
2018-12-111233-046-13356.90 ppb
2018-12-111233-047-1340ND
2018-12-111233-049-1245ND
2018-12-111233-050-1250ND
2018-12-191233-012-10504.80 ppb
2018-12-201233-046-13106.80 ppb
2019-01-171233-012-08206.90 ppb
2019-01-171233-046-08359.30 ppb
2019-01-171233-047-08403.70 ppb
2019-01-171233-049-09455.40 ppb
2019-01-171233-050-0950ND
2019-01-251233-046-09007.60 ppb
2019-01-251233-047-0905ND
2019-02-181233-012-13158.90 ppb
2019-02-181233-013-122511.0 ppb
2019-02-181233-046-13309.50 ppb
2019-02-181233-047-13355.10 ppb
2019-02-181233-049-12306.00 ppb
2019-02-181233-050-1235ND
2019-02-261233-046-141010.00 ppb
2019-02-261233-047-14155.00 ppb
2019-03-121233-049-13259.10 ppb
2019-03-121233-050-1330ND
2019-04-101233-049-11004.40 ppb
2019-04-101233-050-1105ND
2019-05-141233-013-135511.0 ppb
2019-05-141233-049-14009.50 ppb
2019-05-141233-050-1405ND
2019-07-111233-049-144010.00 ppb
2019-07-111233-050-1445ND
2019-08-071233-013-090514.0 ppb
2019-08-071233-049-09108.20 ppb
2019-08-071233-050-0915ND
2019-09-041233-049-133512.0 ppb
2019-09-041233-050-13402.20 ppb