Chromium (total)
City of Houston
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.546 ppb | 100 | 30 | ND - 4.70 ppb |
2014 | 0.589 ppb | 117 | 33 | ND - 6.00 ppb |
2015 | ND | 17 | 0 | ND |
2016 | ND | 29 | 0 | ND |
2017 | 0.374 ppb | 27 | 1 | ND - 10.1 ppb |
2018 | ND | 17 | 0 | ND |
2019 | 0.890 ppb | 30 | 2 | ND - 14.3 ppb |
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 |
---|---|---|
2013-07-09 | 1307298-001A | ND |
2013-07-09 | 1307338-001A | 1.10 ppb |
2013-07-09 | 1307282-001A | ND |
2013-07-09 | 1307286-001A | ND |
2013-07-09 | 1307283-001A | 1.90 ppb |
2013-07-09 | 1307329-001A | ND |
2013-07-09 | 1307285-001A | ND |
2013-07-09 | 1307295-001A | 1.30 ppb |
2013-07-09 | 1307290-001A | ND |
2013-07-09 | 1307296-001A | ND |
2013-07-09 | 1307291-001A | ND |
2013-07-09 | 1307293-001A | ND |
2013-07-09 | 1307294-001A | ND |
2013-07-09 | 1307339-001A | 0.290 ppb |
2013-07-09 | 1307292-001A | ND |
2013-07-09 | 1307426-001A | ND |
2013-07-09 | 1307300-001A | ND |
2013-07-09 | 1307425-001A | ND |
2013-07-09 | 1307333-001A | ND |
2013-07-09 | 1307284-001A | ND |
2013-07-10 | 1307327-001A | ND |
2013-07-10 | 1307334-001A | 0.350 ppb |
2013-07-10 | 1307328-001A | ND |
2013-07-10 | 1307335-001A | ND |
2013-07-10 | 1307330-001A | ND |
2013-07-10 | 1307337-001A | ND |
2013-07-10 | 1307310-001A | ND |
2013-07-10 | 1307331-001A | ND |
2013-07-10 | 1307340-001A | ND |
2013-07-10 | 1307332-001A | ND |
2013-07-10 | 1307311-001A | ND |
2013-07-10 | 1307341-001A | ND |
2013-07-11 | 1307336-001A | ND |
2013-07-11 | 1307304-001A | ND |
2013-07-16 | 1307541-001A | ND |
2013-07-16 | 1307534-001A | 4.70 ppb |
2013-07-16 | 1307536-001A | 2.10 ppb |
2013-07-16 | 1307553-001A | 0.340 ppb |
2013-07-16 | 1307542-001A | ND |
2013-07-16 | 1307537-001A | 3.00 ppb |
2013-07-16 | 1307535-001A | ND |
2013-07-16 | 1307549-001A | 3.30 ppb |
2013-07-16 | 1307555-001A | ND |
2013-07-16 | 1307551-001A | 0.300 ppb |
2013-07-16 | 1307554-001A | 3.00 ppb |
2013-07-16 | 1307545-001A | 3.20 ppb |
2013-07-16 | 1307550-001A | ND |
2013-07-16 | 1307548-001A | ND |
2013-07-16 | 1307544-001A | 0.420 ppb |
2013-07-16 | 1307539-001A | 1.70 ppb |
2013-07-16 | 1307538-001A | ND |
2013-07-16 | 1307540-001A | 2.50 ppb |
2013-07-16 | 1307552-001A | 2.00 ppb |
2013-07-17 | 1307587-001A | 1.70 ppb |
2013-07-17 | 1307592-001A | 1.70 ppb |
2013-07-17 | 1307593-001A | 0.850 ppb |
2013-07-17 | 1307543-001A | 4.40 ppb |
2013-07-17 | 1307588-001A | 1.40 ppb |
2013-07-17 | 1307590-001A | 1.20 ppb |
2013-07-17 | 1307594-001A | 1.60 ppb |
2013-07-17 | 1307546-001A | 2.70 ppb |
2013-07-17 | 1307547-001A | 0.780 ppb |
2013-07-17 | 1307591-001A | ND |
2013-07-30 | 1307A06-001A | ND |
2013-07-31 | 1307A07-001A | 1.80 ppb |
2013-10-15 | 1310526-001A | ND |
2013-10-15 | 1310596-001A | ND |
2013-10-15 | 1310536-001A | ND |
2013-10-15 | 1310525-001A | ND |
2013-10-15 | 1310581-001A | ND |
2013-10-15 | 1310533-001A | ND |
2013-10-15 | 1310528-001A | ND |
2013-10-15 | 1310529-001A | ND |
2013-10-15 | 1310530-001A | ND |
2013-10-15 | 1310531-001A | ND |
2013-10-15 | 1310532-001A | ND |
2013-10-15 | 1310534-001A | ND |
2013-10-15 | 1310576-001A | ND |
2013-10-15 | 1310577-001A | ND |
2013-10-15 | 1310579-001A | ND |
2013-10-15 | 1310580-001A | ND |
2013-10-15 | 1310527-001A | ND |
2013-10-15 | 1310535-001A | ND |
2013-10-15 | 1310524-001A | ND |
2013-10-15 | 1310595-001A | ND |
2013-10-16 | 1310592-001A | 2.80 ppb |
2013-10-16 | 1310594-001A | ND |
2013-10-16 | 1310597-001A | ND |
2013-10-16 | 1310589-001A | ND |
2013-10-16 | 1310585-001A | ND |
2013-10-16 | 1310583-001A | 0.540 ppb |
2013-10-16 | 1310582-001A | ND |
2013-10-16 | 1310590-001A | ND |
2013-10-16 | 1310587-001A | ND |
2013-10-16 | 1310584-001A | ND |
2013-10-16 | 1310591-001A | ND |
2013-10-16 | 1310586-001A | 1.60 ppb |
2013-10-16 | 1310588-001A | ND |
2013-10-16 | 1310593-001A | ND |
2013-11-12 | 1311454-001A | ND |
2014-01-21 | 1401595-001A | ND |
2014-01-21 | 1401602-001A | ND |
2014-01-21 | 1401750-001A | ND |
2014-01-21 | 1401592-001A | 1.10 ppb |
2014-01-21 | 1401596-001A | ND |
2014-01-21 | 1401597-001A | 2.10 ppb |
2014-01-21 | 1401598-001A | ND |
2014-01-21 | 1401600-001A | ND |
2014-01-21 | 1401594-001A | ND |
2014-01-21 | 1401590-001A | ND |
2014-01-21 | 1401589-001A | ND |
2014-01-21 | 1401588-001A | ND |
2014-01-21 | 1401587-001A | ND |
2014-01-21 | 1401586-001A | ND |
2014-01-21 | 1401585-001A | ND |
2014-01-21 | 1401591-001A | ND |
2014-01-21 | 1401584-001A | ND |
2014-01-21 | 1401582-001A | 0.280 ppb |
2014-01-21 | 1401583-001A | ND |
2014-01-21 | 1401692-001A | ND |
2014-01-21 | 1401691-001A | ND |
2014-01-21 | 1401635-001A | ND |
2014-01-21 | 1401593-001A | ND |
2014-01-21 | 1401601-001A | ND |
2014-01-21 | 1401693-001A | ND |
2014-01-21 | 1401599-001A | ND |
2014-01-21 | 1401641-001A | ND |
2014-01-21 | 1401603-001A | ND |
2014-01-22 | 1401639-001A | ND |
2014-01-22 | 1401637-001A | ND |
2014-01-22 | 1401636-001A | ND |
2014-01-22 | 1401634-001A | 1.70 ppb |
2014-01-22 | 1401604-001A | ND |
2014-01-22 | 1401638-001A | ND |
2014-01-22 | 1401640-001A | ND |
2014-02-03 | AC41009 | ND |
2014-02-05 | 1402322-001A | 1.80 ppb |
2014-02-05 | 1402196-001A | 1.90 ppb |
2014-02-05 | 1402205-001A | ND |
2014-02-05 | 1402190-001A | 3.00 ppb |
2014-02-05 | 1402211-001A | 1.70 ppb |
2014-02-05 | 1402198-001A | 0.870 ppb |
2014-02-05 | 1402193-001A | 5.90 ppb |
2014-02-05 | 1402184-001A | 5.90 ppb |
2014-02-05 | 1402199-001A | ND |
2014-02-05 | 1402197-001A | ND |
2014-02-05 | 1402201-001A | 2.30 ppb |
2014-02-05 | 1402202-001A | 1.50 ppb |
2014-02-05 | 1402192-001A | 4.70 ppb |
2014-02-05 | 1402185-001A | 1.40 ppb |
2014-02-05 | 1402186-001A | ND |
2014-02-05 | 1402191-001A | 1.70 ppb |
2014-02-05 | 1402187-001A | 3.90 ppb |
2014-02-05 | 1402178-001A | ND |
2014-02-05 | 1402179-001A | ND |
2014-02-05 | 1402177-001A | 1.70 ppb |
2014-02-05 | 1402183-001A | 1.20 ppb |
2014-02-05 | 1402182-001A | 2.20 ppb |
2014-02-05 | 1402181-001A | ND |
2014-02-05 | 1402180-001A | 0.240 ppb |
2014-02-05 | 1402175-001A | 0.550 ppb |
2014-02-05 | 1402176-001A | 2.30 ppb |
2014-02-05 | 1402195-001A | ND |
2014-02-05 | 1402189-001A | 2.50 ppb |
2014-02-05 | 1402188-001A | ND |
2014-02-05 | 1402200-001A | 1.90 ppb |
2014-03-14 | AC47093 | ND |
2014-03-14 | AC47094 | ND |
2014-03-14 | AC47095 | ND |
2014-03-17 | 1403595-001A | 1.90 ppb |
2014-04-14 | 1404632-001A | ND |
2014-04-15 | 1404648-001A | ND |
2014-04-15 | 1404649-001A | ND |
2014-04-15 | 1404643-001A | ND |
2014-04-15 | 1404641-001A | ND |
2014-04-15 | 1404639-001A | 1.60 ppb |
2014-04-15 | 1404640-001A | 0.610 ppb |
2014-04-15 | 1404636-001A | ND |
2014-04-15 | 1404637-001A | ND |
2014-04-15 | 1404638-001A | ND |
2014-04-15 | 1404631-001A | ND |
2014-04-15 | 1404635-001A | ND |
2014-04-15 | 1404633-001A | ND |
2014-04-15 | 1404627-001A | ND |
2014-04-15 | 1404646-001A | ND |
2014-04-15 | 1404645-001A | ND |
2014-04-15 | 1404642-001A | ND |
2014-04-15 | 1404644-001A | ND |
2014-04-16 | AC50780 | ND |
2014-04-16 | AC50781 | ND |
2014-04-17 | AC51021 | ND |
2014-04-21 | 1404865-001A | ND |
2014-04-21 | 1404862-001A | 2.30 ppb |
2014-04-21 | 1404860-001A | 0.510 ppb |
2014-04-21 | 1404859-001A | 0.710 ppb |
2014-04-21 | 1404861-001A | ND |
2014-04-21 | 1404863-001A | ND |
2014-04-21 | 1404864-001A | ND |
2014-04-21 | 1404858-001A | 1.000 ppb |
2014-04-21 | 1404857-001A | 6.00 ppb |
2014-04-21 | 1404856-001A | ND |
2014-04-28 | 1404B01-001A | ND |
2014-04-28 | 1404A98-001A | ND |
2014-04-28 | 1404B04-001A | ND |
2014-04-28 | 1404B02-001A | ND |
2014-04-28 | 1404B03-001A | ND |
2014-06-03 | AC55768 | ND |
2014-06-03 | AC55769 | ND |
2014-07-15 | AC59675 | ND |
2014-07-15 | AC59674 | ND |
2014-07-16 | AC59810 | ND |
2014-08-14 | AC63644 | ND |
2014-10-08 | AC69151 | ND |
2014-10-09 | AC69343 | ND |
2014-10-09 | AC69342 | ND |
2014-12-18 | AC75421 | ND |
2014-12-18 | AC75424 | ND |
2015-03-04 | AC82828 | ND |
2015-03-05 | AC82837 | ND |
2015-06-04 | AC94569 | ND |
2015-06-04 | AC94568 | ND |
2015-06-04 | AC94567 | ND |
2015-06-04 | AC94566 | ND |
2015-06-04 | AC94565 | ND |
2015-07-21 | AD00317 | ND |
2015-07-21 | AD00315 | ND |
2015-07-21 | AD00316 | ND |
2015-07-21 | AD00322 | ND |
2015-07-21 | AD00320 | ND |
2015-09-17 | AD07499 | ND |
2015-10-22 | AD11442 | ND |
2015-10-22 | AD11445 | ND |
2015-10-22 | AD11444 | ND |
2015-11-12 | AD13300 | ND |
2016-02-18 | AD24198 | ND |
2016-02-18 | AD24206 | ND |
2016-02-18 | AD24189 | ND |
2016-02-18 | AD24207 | ND |
2016-02-18 | AD24197 | ND |
2016-02-18 | AD24205 | ND |
2016-03-03 | AD26825 | ND |
2016-03-16 | AD28983 | ND |
2016-03-16 | AD28979 | ND |
2016-03-17 | AD29296 | ND |
2016-03-17 | AD29295 | ND |
2016-03-23 | AD30057 | ND |
2016-03-23 | AD30059 | ND |
2016-03-23 | AD30063 | ND |
2016-03-23 | AD30058 | ND |
2016-06-08 | AD39687 | ND |
2016-06-08 | AD39686 | ND |
2016-06-16 | AD40881 | ND |
2016-06-16 | AD40876 | ND |
2016-09-20 | AD50273 | ND |
2016-09-20 | AD50274 | ND |
2016-09-21 | AD50631 | ND |
2016-10-06 | AD52620 | ND |
2016-10-06 | AD52621 | ND |
2016-10-06 | AD52624 | ND |
2016-11-18 | AD58725 | ND |
2016-11-21 | AD58729 | ND |
2016-11-21 | AD58730 | ND |
2016-11-21 | AD58728 | ND |
2017-01-26 | AD67045 | ND |
2017-01-26 | AD67054 | 10.1 ppb |
2017-02-28 | AD72383 | ND |
2017-02-28 | AD72381 | ND |
2017-03-01 | AD72708 | ND |
2017-03-01 | AD72707 | ND |
2017-03-02 | AD73025 | ND |
2017-03-02 | AD73018 | ND |
2017-03-28 | AD77082 | ND |
2017-03-28 | AD77083 | ND |
2017-03-28 | AD77081 | ND |
2017-03-28 | AD77080 | ND |
2017-03-29 | AD77389 | ND |
2017-03-29 | AD77385 | ND |
2017-04-26 | AD81106 | ND |
2017-04-27 | AD81406 | ND |
2017-04-27 | AD81407 | ND |
2017-07-06 | AD88418 | ND |
2017-07-06 | AD88419 | ND |
2017-07-06 | AD88420 | ND |
2017-07-25 | AD90485 | ND |
2017-09-11 | AD95398 | ND |
2017-09-11 | AD95394 | ND |
2017-09-26 | AD97954 | ND |
2017-09-26 | AD97959 | ND |
2017-09-26 | AD97955 | ND |
2017-11-07 | AE03784 | ND |
2018-01-18 | AE09188 | ND |
2018-01-18 | AE09190 | ND |
2018-01-18 | AE09189 | ND |
2018-01-23 | AE09790 | ND |
2018-01-23 | AE09789 | ND |
2018-01-23 | AE09788 | ND |
2018-01-31 | AE11454 | ND |
2018-04-26 | AE24066 | ND |
2018-04-26 | AE24067 | ND |
2018-04-26 | AE24065 | ND |
2018-05-22 | AE27174 | ND |
2018-07-19 | AE33888 | ND |
2018-08-03 | AE35761 | ND |
2018-08-15 | AE37111 | ND |
2018-08-15 | AE37110 | ND |
2018-08-15 | AE37108 | ND |
2018-09-26 | AE41684 | ND |
2019-01-15 | AE50041 | ND |
2019-01-15 | AE50040 | ND |
2019-01-16 | AE50037 | ND |
2019-03-06 | AE57327 | ND |
2019-03-06 | AE57324 | ND |
2019-03-06 | AE57322 | ND |
2019-03-06 | AE57323 | ND |
2019-03-06 | AE57326 | ND |
2019-03-06 | AE57325 | ND |
2019-04-10 | AE61966 | ND |
2019-04-10 | AE61967 | ND |
2019-04-11 | AE61969 | ND |
2019-04-11 | AE61968 | ND |
2019-07-25 | AE75881 | ND |
2019-07-25 | AE75878 | ND |
2019-09-23 | AE84176 | ND |
2019-09-23 | AE84177 | ND |
2019-11-18 | AE89449 | ND |
2019-11-18 | AE89450 | ND |
2019-11-22 | AE90336 | ND |
2019-11-22 | AE90338 | ND |
2019-11-22 | AE90337 | ND |
2019-11-22 | AE90333 | ND |
2019-11-22 | AE90334 | ND |
2019-12-02 | AE90796 | ND |
2019-12-02 | AE90794 | 12.4 ppb |
2019-12-02 | AE90793 | 14.3 ppb |
2019-12-02 | AE90791 | ND |
2019-12-02 | AE90795 | ND |
2019-12-02 | AE90792 | ND |