Know Your Environment. Protect Your Health.

Chromium (total)

Lehigh County Authority Allentown Division

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.000 ppb221.000 ppb
20191.50 ppb221.000 ppb - 2.00 ppb
20200.550 ppb41ND - 2.20 ppb
20213.38 ppb43ND - 4.80 ppb
202213.3 ppb447.40 ppb - 30.0 ppb
20231.000 ppb54ND - 2.00 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
2018-08-078081002-011.000 ppb
2018-08-078081002-021.000 ppb
2019-08-139076596-021.000 ppb
2019-08-139076596-012.00 ppb
2020-10-1223232317.00ND
2020-10-2123232331.00ND
2020-10-2823232717.00ND
2020-10-2823232705.002.20 ppb
2021-10-0625456614.004.80 ppb
2021-10-1125456598.00ND
2021-10-1325457002.004.10 ppb
2021-10-1325456989.004.60 ppb
2022-10-0527693461.007.40 ppb
2022-10-0527693449.007.70 ppb
2022-10-1127693473.008.00 ppb
2022-10-1927694097.0030.0 ppb
2023-10-1129937627.002.00 ppb
2023-10-1129937625.001.000 ppb
2023-10-1829937626.001.000 ppb
2023-10-2529937665.001.000 ppb
2023-10-2529937664.00ND