Chromium (total)

City of Gulfport

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.

MORE ABOUT THIS CONTAMINANT

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	ND	10	0	ND
2014	0.448 ppb	21	7	ND - 3.70 ppb
2015	1.63 ppb	17	17	0.800 ppb - 4.70 ppb
2016	N/A	0	0	N/A
2017	0.700 ppb	5	4	ND - 1.10 ppb
2018	1.02 ppb	17	17	0.500 ppb - 1.60 ppb
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
2013-07-15	731040-9333	ND
2013-07-16	731526-9333	ND
2013-07-16	731541-9333	ND
2013-07-16	731528-9333	ND
2013-07-17	731795-9361	ND
2013-07-17	731899-9361	ND
2013-07-17	731791-9361	ND
2013-07-17	731813-9361	ND
2013-07-17	731793-9361	ND
2013-07-24	733397-9362	ND
2014-01-22	767636-10675	ND
2014-01-22	767626-10675	ND
2014-01-22	767618-10644	ND
2014-01-22	767624-10644	ND
2014-01-23	768019-10675	ND
2014-01-23	768021-10675	ND
2014-01-23	768023-10675	ND
2014-01-23	768013-10675	ND
2014-01-27	768025-10675	ND
2014-02-03	768828-10681	ND
2014-04-09	140410-018IN	1.30 ppb
2014-04-09	140410-006IN	3.70 ppb
2014-04-09	140410-007IN	1.40 ppb
2014-04-09	140410-008IN	ND
2014-04-09	140410-009IN	ND
2014-04-09	140410-010IN	ND
2014-04-09	140410-019IN	0.800 ppb
2014-04-09	140410-020IN	1.000 ppb
2014-04-09	140410-021IN	0.600 ppb
2014-04-09	140410-022IN	ND
2014-04-09	140410-023IN	0.600 ppb
2015-03-04	150305-017IN	1.20 ppb
2015-03-04	150305-025IN	0.800 ppb
2015-03-04	150305-020IN	0.900 ppb
2015-03-04	150305-019IN	1.000 ppb
2015-03-04	150305-018IN	1.20 ppb
2015-03-04	150305-016IN	1.10 ppb
2015-03-04	150305-015IN	0.800 ppb
2015-03-04	150305-010IN	1.000 ppb
2015-03-04	150305-009IN	1.50 ppb
2015-03-04	150305-008IN	1.000 ppb
2015-03-04	150305-007IN	1.50 ppb
2015-03-04	150305-006IN	1.50 ppb
2015-03-04	150305-005IN	2.00 ppb
2015-03-04	150305-004IN	2.40 ppb
2015-03-04	150305-003IN	1.90 ppb
2015-03-04	150305-002IN	4.70 ppb
2015-03-04	150305-001IN	3.20 ppb
2017-05-10	170511-004IN	1.10 ppb
2017-05-10	170511-001IN	0.700 ppb
2017-05-10	170511-002IN	0.800 ppb
2017-05-10	170511-003IN	0.900 ppb
2017-05-22	170523-004IN	ND
2018-10-16	181017-035IN	1.000 ppb
2018-10-16	181017-019IN	1.60 ppb
2018-10-16	181017-020IN	1.20 ppb
2018-10-16	181017-021IN	1.000 ppb
2018-10-16	181017-022IN	1.000 ppb
2018-10-16	181017-023IN	0.700 ppb
2018-10-16	181017-024IN	1.10 ppb
2018-10-16	181017-025IN	0.900 ppb
2018-10-16	181017-026IN	0.500 ppb
2018-10-16	181017-027IN	0.700 ppb
2018-10-16	181017-028IN	0.900 ppb
2018-10-16	181017-029IN	1.10 ppb
2018-10-16	181017-030IN	1.60 ppb
2018-10-16	181017-031IN	1.40 ppb
2018-10-16	181017-032IN	0.900 ppb
2018-10-16	181017-033IN	0.700 ppb
2018-10-16	181017-034IN	1.000 ppb
2019-10-14	191015-004IN	ND
2019-10-14	191015-005IN	ND