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).
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.693 ppb | 100 | 83 | ND - 5.14 ppb |
2014 | 0.802 ppb | 99 | 95 | ND - 6.66 ppb |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/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 |
---|---|---|
2013-07-16 | 13071606-06 | 2.10 ppb |
2013-07-16 | 13071611-03 | 3.13 ppb |
2013-07-16 | 13071611-02 | 3.22 ppb |
2013-07-16 | 13071606-01 | ND |
2013-07-16 | 13071608-01 | 2.03 ppb |
2013-07-16 | 13071607-01 | 0.976 ppb |
2013-07-16 | 13071611-01 | 5.14 ppb |
2013-07-16 | 13071606-04 | 4.89 ppb |
2013-07-16 | 13071607-02 | 0.349 ppb |
2013-07-16 | 13071607-05 | 3.51 ppb |
2013-07-16 | 13071607-04 | 0.0390 ppb |
2013-07-16 | 13071608-02 | 1.42 ppb |
2013-07-16 | 13071608-06 | 1.34 ppb |
2013-07-16 | 13071606-05 | 4.93 ppb |
2013-07-16 | 13071606-03 | 1.73 ppb |
2013-07-16 | 13071606-07 | 1.11 ppb |
2013-07-16 | 13071611-04 | 4.35 ppb |
2013-07-16 | 13071607-06 | 0.204 ppb |
2013-07-16 | 13071606-08 | 0.540 ppb |
2013-07-16 | 13071606-10 | 1.54 ppb |
2013-07-16 | 13071608-05 | 0.0620 ppb |
2013-07-16 | 13071606-02 | 0.158 ppb |
2013-07-16 | 1307545-001B | 4.40 ppb |
2013-07-16 | 13071607-07 | 0.249 ppb |
2013-07-16 | 13071611-06 | 2.80 ppb |
2013-07-16 | 13071608-07 | ND |
2013-07-16 | 13071608-08 | 0.0700 ppb |
2013-07-16 | 13071611-07 | 2.86 ppb |
2013-07-16 | 13071608-04 | ND |
2013-07-16 | 13071608-03 | 2.23 ppb |
2013-07-30 | 13073007-05 | 0.0500 ppb |
2013-07-30 | 13073013-03 | ND |
2013-07-30 | 13073007-01 | 0.0650 ppb |
2013-07-30 | 13073008-02 | ND |
2013-07-30 | 13073008-05 | 0.271 ppb |
2013-07-30 | 13073011-03 | 0.0350 ppb |
2013-07-30 | 13073011-04 | 0.0440 ppb |
2013-07-30 | 13073007-04 | 0.0380 ppb |
2013-07-30 | 13073008-04 | 2.23 ppb |
2013-07-30 | 13073007-02 | ND |
2013-07-30 | 13073008-03 | 0.0390 ppb |
2013-07-30 | 13073006-02 | ND |
2013-07-30 | 13073011-06 | 0.0880 ppb |
2013-07-30 | 13073007-03 | ND |
2013-07-30 | 13073008-01 | 0.0640 ppb |
2013-07-30 | 13073009-05 | 2.58 ppb |
2013-07-30 | 13073011-01 | 0.0440 ppb |
2013-07-30 | 13073013-02 | 0.0460 ppb |
2013-07-30 | 13073011-02 | ND |
2013-07-30 | 13073007-06 | 0.0420 ppb |
2013-07-30 | 13073007-07 | 0.0760 ppb |
2013-07-30 | 13073007-08 | 0.0630 ppb |
2013-07-30 | 13073007-09 | ND |
2013-07-30 | 13073007-10 | 0.0820 ppb |
2013-07-30 | 13073008-08 | ND |
2013-07-30 | 13073013-06 | 0.0890 ppb |
2013-07-30 | 13073008-09 | 0.0590 ppb |
2013-07-30 | 13073011-08 | ND |
2013-07-30 | 13073008-06 | ND |
2013-07-30 | 13073013-04 | 0.0500 ppb |
2013-07-30 | 13073008-07 | 0.0510 ppb |
2013-07-30 | 13073013-05 | ND |
2013-07-30 | 13073011-07 | 1.81 ppb |
2013-07-30 | 13073013-01 | ND |
2013-07-30 | 13073006-01 | 0.0500 ppb |
2013-07-30 | 13073011-05 | 0.0410 ppb |
2013-10-15 | 13101510-03 | 0.0590 ppb |
2013-10-15 | 13101509-01 | 0.115 ppb |
2013-10-15 | 13101509-02 | 0.0720 ppb |
2013-10-15 | 13101506-02 | 0.0750 ppb |
2013-10-15 | 13101511-09 | 0.152 ppb |
2013-10-15 | 13101511-08 | 0.0340 ppb |
2013-10-15 | 13101511-06 | 0.0810 ppb |
2013-10-15 | 13101511-07 | ND |
2013-10-15 | 13101510-06 | 0.0550 ppb |
2013-10-15 | 13101510-05 | 0.0560 ppb |
2013-10-15 | 13101510-04 | 0.0600 ppb |
2013-10-15 | 13101511-01 | 0.0510 ppb |
2013-10-15 | 13101508-08 | 0.106 ppb |
2013-10-15 | 13101508-07 | 0.213 ppb |
2013-10-15 | 13101509-08 | 0.329 ppb |
2013-10-15 | 13101509-07 | 0.0720 ppb |
2013-10-15 | 13101509-06 | ND |
2013-10-15 | 13101509-10 | 0.0910 ppb |
2013-10-15 | 13101509-09 | 0.109 ppb |
2013-10-15 | 13101510-01 | 0.0450 ppb |
2013-10-15 | 13101506-01 | 0.103 ppb |
2013-10-16 | 13101607-02 | 0.0830 ppb |
2013-10-16 | 13101607-03 | 0.0700 ppb |
2013-10-16 | 13101609-09 | 0.259 ppb |
2013-10-16 | 13101607-06 | 0.0680 ppb |
2013-10-16 | 13101609-08 | 0.477 ppb |
2013-10-16 | 13101608-07 | 0.151 ppb |
2013-10-16 | 13101608-06 | 0.0950 ppb |
2013-10-16 | 13101607-07 | 0.0510 ppb |
2013-10-16 | 13101609-10 | 0.233 ppb |
2013-10-16 | 13101606-07 | 2.33 ppb |
2013-10-16 | 13101606-06 | 0.0520 ppb |
2013-10-16 | 13101606-08 | 0.118 ppb |
2013-10-16 | 13101606-01 | 0.0690 ppb |
2014-01-21 | 14012115-05 | 0.0430 ppb |
2014-01-21 | 14012111-03 | 0.103 ppb |
2014-01-21 | 14012115-01 | 0.0970 ppb |
2014-01-21 | 14012116-02 | 0.0520 ppb |
2014-01-21 | 14012116-05 | 1.50 ppb |
2014-01-21 | 14012115-04 | 0.0890 ppb |
2014-01-21 | 14012116-04 | 2.65 ppb |
2014-01-21 | 14012115-02 | 0.0640 ppb |
2014-01-21 | 14012116-03 | ND |
2014-01-21 | 14012110-02 | 0.102 ppb |
2014-01-21 | 14012115-10 | 0.121 ppb |
2014-01-21 | 14012115-08 | 0.0760 ppb |
2014-01-21 | 14012115-07 | 1.36 ppb |
2014-01-21 | 14012115-06 | 0.0730 ppb |
2014-01-21 | 14012116-08 | 0.0800 ppb |
2014-01-21 | 14012116-09 | 0.125 ppb |
2014-01-21 | 14012112-06 | 0.0950 ppb |
2014-01-21 | 14012111-06 | 0.0740 ppb |
2014-01-21 | 14012111-05 | 0.0940 ppb |
2014-01-21 | 14012111-04 | 0.134 ppb |
2014-01-21 | 14012116-07 | 0.117 ppb |
2014-01-21 | 14012116-06 | 0.0750 ppb |
2014-01-21 | 14012115-03 | ND |
2014-01-21 | 14012116-01 | 0.127 ppb |
2014-01-21 | 14012112-01 | 0.125 ppb |
2014-01-21 | 14012111-02 | 0.0630 ppb |
2014-01-21 | 14012115-09 | 0.0860 ppb |
2014-01-21 | 14012111-01 | 0.0730 ppb |
2014-01-21 | 14012110-01 | 0.139 ppb |
2014-01-22 | 14012112-03 | 0.0420 ppb |
2014-01-22 | 14012112-04 | 0.0690 ppb |
2014-01-22 | 14012112-08 | 0.0300 ppb |
2014-01-22 | 14012112-07 | 2.13 ppb |
2014-01-22 | 14012112-02 | 0.0370 ppb |
2014-01-22 | 14012112-05 | 0.0520 ppb |
2014-02-05 | 14020507-06 | 2.11 ppb |
2014-02-05 | 14020508-03 | 3.53 ppb |
2014-02-05 | 14020508-02 | 2.00 ppb |
2014-02-05 | 14020507-01 | 0.0620 ppb |
2014-02-05 | 14020511-01 | 1.89 ppb |
2014-02-05 | 14020509-01 | 0.992 ppb |
2014-02-05 | 14020508-01 | 6.66 ppb |
2014-02-05 | 14020507-04 | 2.29 ppb |
2014-02-05 | 14020509-02 | 0.0890 ppb |
2014-02-05 | 14020509-05 | 2.60 ppb |
2014-02-05 | 14020509-04 | 0.0330 ppb |
2014-02-05 | 14020511-02 | 1.65 ppb |
2014-02-05 | 14020511-06 | 1.55 ppb |
2014-02-05 | 14020507-05 | 5.38 ppb |
2014-02-05 | 14020507-03 | 1.94 ppb |
2014-02-05 | 14020509-03 | 0.0720 ppb |
2014-02-05 | 14020507-07 | 1.98 ppb |
2014-02-05 | 14020508-04 | 4.00 ppb |
2014-02-05 | 14020507-08 | 0.702 ppb |
2014-02-05 | 14020507-09 | 2.64 ppb |
2014-02-05 | 14020507-10 | 1.97 ppb |
2014-02-05 | 14020508-06 | 2.33 ppb |
2014-02-05 | 14020508-07 | 1.47 ppb |
2014-02-05 | 14020511-08 | 0.0780 ppb |
2014-02-05 | 14020511-07 | 0.0590 ppb |
2014-02-05 | 14020509-06 | 0.289 ppb |
2014-02-05 | 14020509-07 | 0.0860 ppb |
2014-02-05 | 14020511-05 | 0.0460 ppb |
2014-02-05 | 14020508-05 | 2.47 ppb |
2014-02-05 | 14020511-04 | ND |
2014-02-05 | 14020511-03 | 2.21 ppb |
2014-04-15 | 14041508-03 | 0.0890 ppb |
2014-04-15 | 14041514-01 | 0.106 ppb |
2014-04-15 | 14041514-02 | 0.0820 ppb |
2014-04-15 | 14041507-02 | 0.0750 ppb |
2014-04-15 | 14041513-08 | 0.0550 ppb |
2014-04-15 | 14041506-06 | 0.105 ppb |
2014-04-15 | 14041506-08 | ND |
2014-04-15 | 14041508-04 | 0.0870 ppb |
2014-04-15 | 14041508-05 | 0.0930 ppb |
2014-04-15 | 14041508-06 | 0.0800 ppb |
2014-04-15 | 14041513-06 | 0.1000 ppb |
2014-04-15 | 14041506-07 | 1.82 ppb |
2014-04-15 | 14041513-09 | 0.703 ppb |
2014-04-15 | 14041514-06 | 0.0830 ppb |
2014-04-15 | 14041514-07 | 0.0800 ppb |
2014-04-15 | 14041513-07 | 0.0960 ppb |
2014-04-15 | 14041513-01 | 0.125 ppb |
2014-04-15 | 14041506-01 | 0.112 ppb |
2014-04-15 | 14041514-10 | 0.0960 ppb |
2014-04-15 | 14041514-08 | 0.0860 ppb |
2014-04-15 | 14041514-09 | 0.0470 ppb |
2014-04-15 | 14041508-01 | 0.0970 ppb |
2014-04-15 | 14041507-01 | 0.0920 ppb |
2014-04-21 | 14042111-02 | 0.0840 ppb |
2014-04-21 | 14042108-08 | 0.0540 ppb |
2014-04-21 | 14042109-07 | 0.598 ppb |
2014-04-21 | 14042108-09 | 6.26 ppb |
2014-04-21 | 14042108-10 | 1.08 ppb |
2014-04-21 | 14042111-07 | 0.0860 ppb |
2014-04-21 | 14042110-06 | 2.60 ppb |
2014-04-21 | 14042110-07 | 0.120 ppb |
2014-04-21 | 14042109-08 | 0.851 ppb |
2014-04-21 | 14042111-06 | 0.0900 ppb |