Know Your Environment. Protect Your Health.

Chromium (total)

Gowc North 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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND10ND
2021ND30ND
2022ND130ND
20234.93 ppb128ND - 9.60 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
2020-12-02B2006458-001ND
2021-02-01B2100475-001ND
2021-05-03B2102123-001ND
2021-05-03B2102123-002ND
2022-02-09B2200572-002ND
2022-02-09B2200572-001ND
2022-02-15B2200664-002ND
2022-02-15B2200664-001ND
2022-04-04B2201638-001ND
2022-04-04B2201638-002ND
2022-09-27B2204850-001ND
2022-10-24B2205110-002ND
2022-10-24B2205110-001ND
2022-11-22B2205635-004ND
2022-11-22B2205635-003ND
2022-11-22B2205635-002ND
2022-11-22B2205635-001ND
2023-01-23B2300295-006ND
2023-01-23B2300295-005ND
2023-01-23B2300295-0046.40 ppb
2023-01-23B2300295-0036.70 ppb
2023-01-23B2300295-0016.50 ppb
2023-01-27B2300529-0017.70 ppb
2023-02-22B2300746-0017.70 ppb
2023-04-03B2301548-0025.30 ppb
2023-04-03B2301548-001ND
2023-07-10B2302776-004ND
2023-07-10B2302776-0029.30 ppb
2023-07-10B2302776-0019.60 ppb