Know Your Environment. Protect Your Health.

Chromium (total)

Cws-split Mountain Water System

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.

 

66

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND50ND
2020ND130ND
2021ND30ND
20222.81 ppb1816ND - 7.00 ppb
20231.61 ppb2118ND - 2.80 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-23CA1500407_005_005-201801231010ND
2018-01-23CA1500407_006_006-201801230950ND
2018-02-07CA1500407_005_005-201802071345ND
2018-02-07CA1500407_006_006-201802071430ND
2018-05-02CA1500407_005_005-201805020835ND
2018-05-02CA1500407_006_006-201805020935ND
2019-01-15CA1500407_005_005-201901151150ND
2019-01-15CA1500407_006_006-201901151132ND
2019-05-08CA1500407_006_006-201905081138ND
2019-05-08CA1500407_005_005-201905081111ND
2019-05-13CA1500407_002_002-201905130958ND
2020-01-22CA1500407_005_005-202001221450ND
2020-01-22CA1500407_006_006-202001221438ND
2020-02-11CA1500407_007_007-202002111247ND
2020-05-06CA1500407_005_005-202005061335ND
2020-05-06CA1500407_006_006-202005061329ND
2020-06-09CA1500407_006_006-202006090834ND
2020-06-09CA1500407_005_005-202006090820ND
2020-08-05CA1500407_006_006-202008051023ND
2020-08-05CA1500407_005_005-202008051050ND
2020-10-21CA1500407_006_006-202010211345ND
2020-10-21CA1500407_005_005-202010211339ND
2020-11-19CA1500407_005_005-202011191234ND
2020-11-19CA1500407_006_006-202011191213ND
2021-01-26CA1500407_006_006-202101261336ND
2021-01-26CA1500407_006_006-202101261336ND
2021-01-26CA1500407_005_005-202101261344ND
2022-01-18CA1500407_005_005-202201181056ND
2022-01-18CA1500407_006_006-202201181111ND
2022-04-07CA1500407_006_006-2022040710053.00 ppb
2022-04-07CA1500407_005_005-2022040710132.70 ppb
2022-05-03CA1500407_006_006-2022050311102.60 ppb
2022-05-03CA1500407_005_005-2022050311062.70 ppb
2022-06-15CA1500407_005_005-2022061514126.00 ppb
2022-06-15CA1500407_006_006-2022061514167.00 ppb
2022-07-13CA1500407_005_005-2022071309164.50 ppb
2022-07-13CA1500407_006_006-2022071309253.90 ppb
2022-08-11CA1500407_006_006-2022081109332.10 ppb
2022-08-11CA1500407_005_005-2022081109382.00 ppb
2022-10-06CA1500407_006_006-2022100608252.70 ppb
2022-10-06CA1500407_005_005-2022100608152.70 ppb
2022-11-15CA1500407_006_006-2022111511322.30 ppb
2022-11-15CA1500407_005_005-2022111511232.00 ppb
2022-12-15CA1500407_005_005-2022121510572.30 ppb
2022-12-15CA1500407_006_006-2022121511032.10 ppb
2023-01-12CA1500407_005_005-2023011211132.30 ppb
2023-01-12CA1500407_006_006-2023011211102.80 ppb
2023-01-26CA1500407_006_006-202301260934ND
2023-01-26CA1500407_005_005-202301260926ND
2023-02-07CA1500407_006_006-2023020714321.90 ppb
2023-02-07CA1500407_005_005-2023020714171.80 ppb
2023-02-23CA1500407_007_007-202302231300ND
2023-03-13CA1500407_005_005-2023031310051.30 ppb
2023-03-13CA1500407_006_006-2023031309551.30 ppb
2023-04-12CA1500407_005_005-2023041213401.30 ppb
2023-04-12CA1500407_006_006-2023041213441.50 ppb
2023-05-18CA1500407_006_006-2023051809141.60 ppb
2023-05-18CA1500407_005_005-2023051809081.40 ppb
2023-06-08CA1500407_006_006-2023060811352.60 ppb
2023-06-08CA1500407_005_005-2023060811132.50 ppb
2023-07-12CA1500407_005_005-2023071209301.80 ppb
2023-07-12CA1500407_006_006-2023071209201.90 ppb
2023-08-15CA1500407_005_005-2023081514251.50 ppb
2023-08-15CA1500407_006_006-2023081514201.70 ppb
2023-10-10CA1500407_005_005-2023101011472.30 ppb
2023-10-10CA1500407_006_006-2023101011432.30 ppb