Know Your Environment. Protect Your Health.

Chromium (total)

Hidden Valley Lake Community Services District

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.

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201812.5 ppb1813ND - 24.0 ppb
201910.9 ppb1610ND - 22.0 ppb
202013.7 ppb129ND - 28.0 ppb
202111.2 ppb96ND - 23.0 ppb
202211.1 ppb86ND - 19.0 ppb
202313.0 ppb43ND - 23.0 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
2018-01-25CA1710015_003_003-201801250934ND
2018-03-07CA1710015_003_003-201803071048ND
2018-03-07CA1710015_002_002-20180307105314.0 ppb
2018-03-07CA1710015_006_006-20180307114519.0 ppb
2018-03-07CA1710015_004_004-20180307112724.0 ppb
2018-04-11CA1710015_002_002-20180411113515.0 ppb
2018-06-13CA1710015_003_003-201806131005ND
2018-06-13CA1710015_004_004-20180613102524.0 ppb
2018-06-13CA1710015_006_006-20180613103514.0 ppb
2018-06-13CA1710015_002_002-20180613100016.0 ppb
2018-09-05CA1710015_002_002-20180905102512.0 ppb
2018-09-05CA1710015_004_004-20180905103518.0 ppb
2018-09-05CA1710015_003_003-201809051020ND
2018-09-05CA1710015_006_006-20180905110819.0 ppb
2018-12-05CA1710015_006_006-20181205103519.0 ppb
2018-12-05CA1710015_002_002-20181205101511.0 ppb
2018-12-05CA1710015_004_004-20181205102520.0 ppb
2018-12-05CA1710015_003_003-201812051010ND
2019-03-06CA1710015_006_006-20190306104217.0 ppb
2019-03-06CA1710015_003_003-20190306100012.0 ppb
2019-03-06CA1710015_004_004-20190306102319.0 ppb
2019-03-06CA1710015_002_002-201903061013ND
2019-06-12CA1710015_003_003-201906121131ND
2019-06-12CA1710015_002_002-20190612113914.0 ppb
2019-06-12CA1710015_006_006-20190612122012.0 ppb
2019-06-12CA1710015_004_004-20190612115521.0 ppb
2019-09-18CA1710015_003_003-201909181030ND
2019-09-18CA1710015_004_004-20190918110721.0 ppb
2019-09-18CA1710015_002_002-201909181051ND
2019-09-18CA1710015_006_006-20190918100022.0 ppb
2019-12-04CA1710015_006_006-20191204110518.0 ppb
2019-12-04CA1710015_003_003-201912041025ND
2019-12-04CA1710015_002_002-201912041050ND
2019-12-04CA1710015_004_004-20191204095518.0 ppb
2020-06-11CA1710015_003_003-202006110857ND
2020-06-11CA1710015_006_006-20200611090717.0 ppb
2020-06-11CA1710015_002_002-20200611084310.00 ppb
2020-06-11CA1710015_004_004-20200611082519.0 ppb
2020-09-23CA1710015_003_003-202009230900ND
2020-09-23CA1710015_004_004-20200923092121.0 ppb
2020-09-23CA1710015_002_002-20200923091312.0 ppb
2020-09-23CA1710015_006_006-20200923092618.0 ppb
2020-12-16CA1710015_002_002-20201216084715.0 ppb
2020-12-16CA1710015_003_003-202012160855ND
2020-12-16CA1710015_004_004-20201216090028.0 ppb
2020-12-16CA1710015_006_006-20201216082024.0 ppb
2021-03-10CA1710015_004_004-20210310090820.0 ppb
2021-03-10CA1710015_002_002-20210310090211.0 ppb
2021-03-10CA1710015_003_003-202103100858ND
2021-03-10CA1710015_006_006-20210310073618.0 ppb
2021-04-02CA1710015_003_003-202104020755ND
2021-06-10CA1710015_002_002-20210610075312.0 ppb
2021-06-10CA1710015_003_003-202106100745ND
2021-06-10CA1710015_004_004-20210610073323.0 ppb
2021-06-10CA1710015_006_006-20210610080717.0 ppb
2022-06-08CA1710015_002_002-20220608075211.0 ppb
2022-06-08CA1710015_003_003-202206080758ND
2022-06-08CA1710015_006_006-20220608080817.0 ppb
2022-06-08CA1710015_004_004-20220608080619.0 ppb
2022-09-21CA1710015_002_002-20220921073112.0 ppb
2022-09-21CA1710015_003_003-202209210736ND
2022-09-21CA1710015_004_004-20220921072017.0 ppb
2022-09-21CA1710015_006_006-20220921075113.0 ppb
2023-09-06CA1710015_006_006-20230906092313.0 ppb
2023-09-06CA1710015_002_002-20230906090016.0 ppb
2023-09-06CA1710015_004_004-20230906083023.0 ppb
2023-09-06CA1710015_003_003-202309060910ND