Chromium (total)

City of Newport News

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	0.148 ppb	12	7	ND - 0.310 ppb
2014	0.123 ppb	6	1	ND - 0.740 ppb
2015	ND	2	0	ND
2016	ND	2	0	ND
2017	ND	2	0	ND
2018	ND	2	0	ND
2019	ND	2	0	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2013-05-14	201305150302AM	0.310 ppb
2013-05-14	201305150175AM	0.280 ppb
2013-05-14	201305150187AM	0.250 ppb
2013-05-14	201305150306AM	0.310 ppb
2013-08-13	201308140379AM	0.230 ppb
2013-08-13	201308140396AM	ND
2013-08-13	201308140467AM	0.200 ppb
2013-08-13	201308140469AM	0.200 ppb
2013-11-19	201311200641AM	ND
2013-11-19	201311200409AM	ND
2013-11-19	201311200666AM	ND
2013-11-19	201311200445AM	ND
2014-02-18	201402190231AM	0.740 ppb
2014-02-18	201402190228AM	ND
2014-02-18	201402190245AM	ND
2014-02-18	201402190249AM	ND
2014-11-03	HMFW_110314M	ND
2014-12-01	LHFW_120114M	ND
2015-12-07	00220-NEWPORT NE	ND
2015-12-07	00220-NEWPORT NE	ND
2016-12-05	HMFW_120516M	ND
2016-12-06	LHFW_120616M	ND
2017-11-01	LHFW_110117M	ND
2017-11-01	HMFW_110117M	ND
2018-12-03	LHFW_120318M	ND
2018-12-03	HMFW_120318M	ND
2019-12-02	LHFW-033030M	ND
2019-12-02	HMFW-033028M	ND