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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

City of Houston

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

 

199

Samples

0

Samples exceeding legal limit (MCL)

178

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.693 ppb10083ND - 5.14 ppb
20140.802 ppb9995ND - 6.66 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
2013-07-1613071606-062.10 ppb
2013-07-1613071611-033.13 ppb
2013-07-1613071611-023.22 ppb
2013-07-1613071606-01ND
2013-07-1613071608-012.03 ppb
2013-07-1613071607-010.976 ppb
2013-07-1613071611-015.14 ppb
2013-07-1613071606-044.89 ppb
2013-07-1613071607-020.349 ppb
2013-07-1613071607-053.51 ppb
2013-07-1613071607-040.0390 ppb
2013-07-1613071608-021.42 ppb
2013-07-1613071608-061.34 ppb
2013-07-1613071606-054.93 ppb
2013-07-1613071606-031.73 ppb
2013-07-1613071606-071.11 ppb
2013-07-1613071611-044.35 ppb
2013-07-1613071607-060.204 ppb
2013-07-1613071606-080.540 ppb
2013-07-1613071606-101.54 ppb
2013-07-1613071608-050.0620 ppb
2013-07-1613071606-020.158 ppb
2013-07-161307545-001B4.40 ppb
2013-07-1613071607-070.249 ppb
2013-07-1613071611-062.80 ppb
2013-07-1613071608-07ND
2013-07-1613071608-080.0700 ppb
2013-07-1613071611-072.86 ppb
2013-07-1613071608-04ND
2013-07-1613071608-032.23 ppb
2013-07-3013073007-050.0500 ppb
2013-07-3013073013-03ND
2013-07-3013073007-010.0650 ppb
2013-07-3013073008-02ND
2013-07-3013073008-050.271 ppb
2013-07-3013073011-030.0350 ppb
2013-07-3013073011-040.0440 ppb
2013-07-3013073007-040.0380 ppb
2013-07-3013073008-042.23 ppb
2013-07-3013073007-02ND
2013-07-3013073008-030.0390 ppb
2013-07-3013073006-02ND
2013-07-3013073011-060.0880 ppb
2013-07-3013073007-03ND
2013-07-3013073008-010.0640 ppb
2013-07-3013073009-052.58 ppb
2013-07-3013073011-010.0440 ppb
2013-07-3013073013-020.0460 ppb
2013-07-3013073011-02ND
2013-07-3013073007-060.0420 ppb
2013-07-3013073007-070.0760 ppb
2013-07-3013073007-080.0630 ppb
2013-07-3013073007-09ND
2013-07-3013073007-100.0820 ppb
2013-07-3013073008-08ND
2013-07-3013073013-060.0890 ppb
2013-07-3013073008-090.0590 ppb
2013-07-3013073011-08ND
2013-07-3013073008-06ND
2013-07-3013073013-040.0500 ppb
2013-07-3013073008-070.0510 ppb
2013-07-3013073013-05ND
2013-07-3013073011-071.81 ppb
2013-07-3013073013-01ND
2013-07-3013073006-010.0500 ppb
2013-07-3013073011-050.0410 ppb
2013-10-1513101510-030.0590 ppb
2013-10-1513101509-010.115 ppb
2013-10-1513101509-020.0720 ppb
2013-10-1513101506-020.0750 ppb
2013-10-1513101511-090.152 ppb
2013-10-1513101511-080.0340 ppb
2013-10-1513101511-060.0810 ppb
2013-10-1513101511-07ND
2013-10-1513101510-060.0550 ppb
2013-10-1513101510-050.0560 ppb
2013-10-1513101510-040.0600 ppb
2013-10-1513101511-010.0510 ppb
2013-10-1513101508-080.106 ppb
2013-10-1513101508-070.213 ppb
2013-10-1513101509-080.329 ppb
2013-10-1513101509-070.0720 ppb
2013-10-1513101509-06ND
2013-10-1513101509-100.0910 ppb
2013-10-1513101509-090.109 ppb
2013-10-1513101510-010.0450 ppb
2013-10-1513101506-010.103 ppb
2013-10-1613101607-020.0830 ppb
2013-10-1613101607-030.0700 ppb
2013-10-1613101609-090.259 ppb
2013-10-1613101607-060.0680 ppb
2013-10-1613101609-080.477 ppb
2013-10-1613101608-070.151 ppb
2013-10-1613101608-060.0950 ppb
2013-10-1613101607-070.0510 ppb
2013-10-1613101609-100.233 ppb
2013-10-1613101606-072.33 ppb
2013-10-1613101606-060.0520 ppb
2013-10-1613101606-080.118 ppb
2013-10-1613101606-010.0690 ppb
2014-01-2114012115-050.0430 ppb
2014-01-2114012111-030.103 ppb
2014-01-2114012115-010.0970 ppb
2014-01-2114012116-020.0520 ppb
2014-01-2114012116-051.50 ppb
2014-01-2114012115-040.0890 ppb
2014-01-2114012116-042.65 ppb
2014-01-2114012115-020.0640 ppb
2014-01-2114012116-03ND
2014-01-2114012110-020.102 ppb
2014-01-2114012115-100.121 ppb
2014-01-2114012115-080.0760 ppb
2014-01-2114012115-071.36 ppb
2014-01-2114012115-060.0730 ppb
2014-01-2114012116-080.0800 ppb
2014-01-2114012116-090.125 ppb
2014-01-2114012112-060.0950 ppb
2014-01-2114012111-060.0740 ppb
2014-01-2114012111-050.0940 ppb
2014-01-2114012111-040.134 ppb
2014-01-2114012116-070.117 ppb
2014-01-2114012116-060.0750 ppb
2014-01-2114012115-03ND
2014-01-2114012116-010.127 ppb
2014-01-2114012112-010.125 ppb
2014-01-2114012111-020.0630 ppb
2014-01-2114012115-090.0860 ppb
2014-01-2114012111-010.0730 ppb
2014-01-2114012110-010.139 ppb
2014-01-2214012112-030.0420 ppb
2014-01-2214012112-040.0690 ppb
2014-01-2214012112-080.0300 ppb
2014-01-2214012112-072.13 ppb
2014-01-2214012112-020.0370 ppb
2014-01-2214012112-050.0520 ppb
2014-02-0514020507-062.11 ppb
2014-02-0514020508-033.53 ppb
2014-02-0514020508-022.00 ppb
2014-02-0514020507-010.0620 ppb
2014-02-0514020511-011.89 ppb
2014-02-0514020509-010.992 ppb
2014-02-0514020508-016.66 ppb
2014-02-0514020507-042.29 ppb
2014-02-0514020509-020.0890 ppb
2014-02-0514020509-052.60 ppb
2014-02-0514020509-040.0330 ppb
2014-02-0514020511-021.65 ppb
2014-02-0514020511-061.55 ppb
2014-02-0514020507-055.38 ppb
2014-02-0514020507-031.94 ppb
2014-02-0514020509-030.0720 ppb
2014-02-0514020507-071.98 ppb
2014-02-0514020508-044.00 ppb
2014-02-0514020507-080.702 ppb
2014-02-0514020507-092.64 ppb
2014-02-0514020507-101.97 ppb
2014-02-0514020508-062.33 ppb
2014-02-0514020508-071.47 ppb
2014-02-0514020511-080.0780 ppb
2014-02-0514020511-070.0590 ppb
2014-02-0514020509-060.289 ppb
2014-02-0514020509-070.0860 ppb
2014-02-0514020511-050.0460 ppb
2014-02-0514020508-052.47 ppb
2014-02-0514020511-04ND
2014-02-0514020511-032.21 ppb
2014-04-1514041508-030.0890 ppb
2014-04-1514041514-010.106 ppb
2014-04-1514041514-020.0820 ppb
2014-04-1514041507-020.0750 ppb
2014-04-1514041513-080.0550 ppb
2014-04-1514041506-060.105 ppb
2014-04-1514041506-08ND
2014-04-1514041508-040.0870 ppb
2014-04-1514041508-050.0930 ppb
2014-04-1514041508-060.0800 ppb
2014-04-1514041513-060.1000 ppb
2014-04-1514041506-071.82 ppb
2014-04-1514041513-090.703 ppb
2014-04-1514041514-060.0830 ppb
2014-04-1514041514-070.0800 ppb
2014-04-1514041513-070.0960 ppb
2014-04-1514041513-010.125 ppb
2014-04-1514041506-010.112 ppb
2014-04-1514041514-100.0960 ppb
2014-04-1514041514-080.0860 ppb
2014-04-1514041514-090.0470 ppb
2014-04-1514041508-010.0970 ppb
2014-04-1514041507-010.0920 ppb
2014-04-2114042111-020.0840 ppb
2014-04-2114042108-080.0540 ppb
2014-04-2114042109-070.598 ppb
2014-04-2114042108-096.26 ppb
2014-04-2114042108-101.08 ppb
2014-04-2114042111-070.0860 ppb
2014-04-2114042110-062.60 ppb
2014-04-2114042110-070.120 ppb
2014-04-2114042109-080.851 ppb
2014-04-2114042111-060.0900 ppb