Chromium (total)
Truckee Meadows Water Authority
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.
131
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.613 ppb | 34 | 26 | ND - 2.10 ppb |
| 2014 | 0.109 ppb | 21 | 4 | ND - 0.770 ppb |
| 2015 | 1.27 ppb | 9 | 1 | ND - 11.4 ppb |
| 2016 | 0.708 ppb | 13 | 1 | ND - 9.20 ppb |
| 2017 | ND | 22 | 0 | ND |
| 2018 | ND | 17 | 0 | ND |
| 2019 | 0.849 ppb | 15 | 2 | ND - 6.73 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 |
|---|---|---|
| 2013-05-20 | 201305210275AM | 0.650 ppb |
| 2013-05-20 | 201305210066AM | 0.350 ppb |
| 2013-05-20 | 201305210061AM | 0.750 ppb |
| 2013-05-20 | 201305210059AM | 0.730 ppb |
| 2013-05-22 | 201305230338AM | 0.440 ppb |
| 2013-05-22 | 201305230342AM | 0.430 ppb |
| 2013-05-22 | 201305230289AM | 0.940 ppb |
| 2013-05-22 | 201305230335AM | 0.600 ppb |
| 2013-06-04 | 201306050182AM | 0.610 ppb |
| 2013-06-04 | 201306050241AM | 0.990 ppb |
| 2013-06-04 | 201306050256AM | ND |
| 2013-06-11 | 201306120163AM | 0.610 ppb |
| 2013-06-11 | 201306120172AM | 0.800 ppb |
| 2013-06-11 | 201306120229AM | ND |
| 2013-06-11 | 201306120213AM | 0.460 ppb |
| 2013-06-11 | 201306120169AM | 0.510 ppb |
| 2013-06-11 | 201306120227AM | 0.510 ppb |
| 2013-06-19 | 201306200268AM | 0.980 ppb |
| 2013-06-19 | 201306200237AM | ND |
| 2013-06-19 | 201306200250AM | 0.860 ppb |
| 2013-06-19 | 201306200243AM | 0.930 ppb |
| 2013-06-19 | 201306200241AM | 1.000 ppb |
| 2013-06-24 | 201306250077AM | 0.590 ppb |
| 2013-06-25 | 201306260231AM | 2.10 ppb |
| 2013-06-25 | 201306260226AM | 1.90 ppb |
| 2013-06-27 | 201306280176AM | 0.800 ppb |
| 2013-07-11 | 201307120477AM | 0.690 ppb |
| 2013-08-29 | 201309200281AM | 1.000 ppb |
| 2013-09-17 | 201309200267AM | ND |
| 2013-09-17 | 201309200263AM | ND |
| 2013-09-17 | 201309200279AM | ND |
| 2013-11-25 | 201311270060AM | 0.600 ppb |
| 2013-12-16 | 201312180499AM | ND |
| 2013-12-17 | 201312180531AM | ND |
| 2014-03-05 | 201403070313AM | ND |
| 2014-03-05 | 201403070277AM | ND |
| 2014-04-22 | 0414-13-I | ND |
| 2014-04-22 | 0414-12-I | ND |
| 2014-04-23 | 0414-17-I | ND |
| 2014-04-23 | 0414-16-I | ND |
| 2014-04-29 | 201405020265AM | 0.600 ppb |
| 2014-04-29 | 201405020257AM | 0.340 ppb |
| 2014-04-29 | 201405020169AM | 0.770 ppb |
| 2014-04-29 | 201405020173AM | 0.580 ppb |
| 2014-05-17 | 0614-13-I | ND |
| 2014-06-09 | 0614-06-I | ND |
| 2014-06-09 | 0614-07-I | ND |
| 2014-06-17 | 0614-11-I | ND |
| 2014-06-17 | 0614-10-I | ND |
| 2014-06-17 | 0614-09-I | ND |
| 2014-06-17 | 0614-12-I | ND |
| 2014-06-17 | 0614-13 | ND |
| 2014-06-17 | 0514-14-I | ND |
| 2014-06-24 | 0614-28-I | ND |
| 2014-06-24 | 0614-26-I | ND |
| 2015-06-08 | 1506017-01 | ND |
| 2015-06-08 | 1506018-01 | ND |
| 2015-06-11 | 1506027-01 | ND |
| 2015-06-17 | 1506035-01 | ND |
| 2015-06-17 | 1506036-01 | ND |
| 2015-06-17 | 1506037-01 | ND |
| 2015-06-17 | 1506038-01 | ND |
| 2015-06-23 | 1506055-01 | ND |
| 2015-06-23 | 1506061-01 | 11.4 ppb |
| 2016-05-31 | 1605028-01 | ND |
| 2016-05-31 | 1605027-01 | ND |
| 2016-06-01 | 1606001-01 | ND |
| 2016-06-06 | 1606010-01 | ND |
| 2016-07-19 | 1607023-01 | ND |
| 2016-07-19 | 1607024-01 | ND |
| 2016-08-04 | 1608010-01 | ND |
| 2016-08-15 | 1608022-01 | ND |
| 2016-08-15 | 1608023-01 | ND |
| 2016-08-24 | 1608035-01 | ND |
| 2016-08-24 | 1608034-01 | ND |
| 2016-08-24 | 1608033-01 | 9.20 ppb |
| 2016-08-25 | 1608036-01 | ND |
| 2017-02-07 | 1702004-01 | ND |
| 2017-03-08 | 1703009-01 | ND |
| 2017-03-08 | 1703008-01 | ND |
| 2017-05-02 | 1705003-01 | ND |
| 2017-05-02 | 1705004-01 | ND |
| 2017-05-15 | 1705023-01 | ND |
| 2017-05-15 | 1705025-01 | ND |
| 2017-05-25 | 1705041-01 | ND |
| 2017-07-11 | 1707003-01 | ND |
| 2017-07-11 | 1707002-01 | ND |
| 2017-07-11 | 1707005-01 | ND |
| 2017-07-11 | 1707004-01 | ND |
| 2017-07-18 | 1707020-01 | ND |
| 2017-07-18 | 1707021-01 | ND |
| 2017-07-18 | 1707022-01 | ND |
| 2017-08-16 | 1708013-01 | ND |
| 2017-08-16 | 1708014-01 | ND |
| 2017-08-29 | 1708026-01 | ND |
| 2017-08-29 | 1708027-01 | ND |
| 2017-08-29 | 1708029-01 | ND |
| 2017-08-29 | 1708030-01 | ND |
| 2017-08-29 | 1708025-01 | ND |
| 2018-01-23 | 1801009-01 | ND |
| 2018-02-06 | 1802006-01 | ND |
| 2018-04-04 | 1804005-01 | ND |
| 2018-04-09 | 1804012-01 | ND |
| 2018-04-11 | 1804017-01 | ND |
| 2018-04-11 | 1804018-01 | ND |
| 2018-04-11 | 1804019-01 | ND |
| 2018-04-25 | 1804025-01 | ND |
| 2018-04-26 | 1804044-01 | ND |
| 2018-05-21 | 1805043-01 | ND |
| 2018-05-23 | 1805041-01 | ND |
| 2018-07-24 | 1807025-01 | ND |
| 2018-11-14 | 1811008-02 | ND |
| 2018-11-14 | 1811009-02 | ND |
| 2018-11-14 | 1811010-02 | ND |
| 2018-11-14 | 1811011-02 | ND |
| 2018-11-14 | 1811012-02 | ND |
| 2019-01-09 | 1901012-02 | 6.73 ppb |
| 2019-01-09 | 1901013-02 | ND |
| 2019-01-16 | 1901017-02 | ND |
| 2019-02-05 | 1902001-01 | ND |
| 2019-02-26 | 1902019-01 | ND |
| 2019-05-07 | 1905007-01 | ND |
| 2019-05-29 | 1905027-01 | ND |
| 2019-06-19 | 1906012-01 | ND |
| 2019-06-19 | 1906015-01 | ND |
| 2019-07-09 | 1907018-01 | 6.01 ppb |
| 2019-07-25 | 1907045-01 | ND |
| 2019-07-29 | 1907046-01 | ND |
| 2019-08-06 | 1908002-01 | ND |
| 2019-08-06 | 1908004-01 | ND |
| 2019-08-06 | 1908007-01 | ND |