Know Your Environment. Protect Your Health.

Chromium (total)

Walnut Grove Utilities

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.500 ppb21ND - 1.000 ppb
20191.88 ppb661.50 ppb - 2.20 ppb
2020N/A00N/A
20215.15 ppb224.40 ppb - 5.90 ppb
20222.68 ppb87ND - 4.90 ppb
20232.15 ppb881.40 ppb - 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
2018-08-15292292-2018-DWI1.000 ppb
2018-10-16295670-2018-DWND
2019-02-26301436-2019-DW1.80 ppb
2019-02-26301437-2019-DWI2.10 ppb
2019-03-05301698-2019-DW1.50 ppb
2019-03-05301699-2019-DWI1.60 ppb
2019-03-12302100-2019-DW2.10 ppb
2019-03-12302099-2019-DW2.20 ppb
2021-07-2173809440035.90 ppb
2021-09-0773877210014.40 ppb
2022-03-08810-17505-1B4.90 ppb
2022-03-08810-17576-1B2.50 ppb
2022-03-08810-17508-1B3.50 ppb
2022-03-09FWC0111A3.40 ppb
2022-03-09810-18451-1B3.30 ppb
2022-03-09810-18448-1A2.30 ppb
2022-03-23810-18980-1I1.50 ppb
2022-05-23FWE0087-01ND
2023-02-15FXB04291.50 ppb
2023-04-04FXC0507-012.80 ppb
2023-04-04FXC0516-012.50 ppb
2023-04-05FXC0500-011.40 ppb
2023-04-05FXC0542-012.50 ppb
2023-04-05FXC0553-012.30 ppb
2023-04-05FXC0559-012.60 ppb
2023-07-31FXF0576-011.60 ppb