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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

North Penn Water Authority

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.

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013N/A00N/A
2014N/A00N/A
20150.378 ppb6316ND - 3.00 ppb
20161.000 ppb111.000 ppb
2017N/A00N/A

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
2012-05-0712050555ND
2012-05-0712050555ND
2012-05-0712050555ND
2012-05-0712050555ND
2012-05-0712050555ND
2012-05-1412051179ND
2012-05-1412051179ND
2012-05-1412051179ND
2012-05-1412051179ND
2012-05-1412051179ND
2012-05-1412051179ND
2012-07-2312072182ND
2015-01-133170065ND
2015-01-133170237ND
2015-01-133170019ND
2015-01-1331701830.300 ppb
2015-01-133170038ND
2015-01-133170157ND
2015-01-133170210ND
2015-01-133170197ND
2015-01-133170135ND
2015-01-133170219ND
2015-01-1331701870.200 ppb
2015-01-133170071ND
2015-01-133170109ND
2015-01-133170142ND
2015-01-133170228ND
2015-01-133170241ND
2015-01-133170051ND
2015-01-1331700060.600 ppb
2015-01-133170201ND
2015-01-133170101ND
2015-01-133169999ND
2015-01-133170084ND
2015-01-19122876522.00 ppb
2015-01-19122876302.00 ppb
2015-01-19122876412.00 ppb
2015-01-19122876192.00 ppb
2015-02-023180017ND
2015-02-09124016812.00 ppb
2015-02-09124016703.00 ppb
2015-02-09124016592.00 ppb
2015-03-09125155991.000 ppb
2015-03-09125155881.000 ppb
2015-04-083220921ND
2015-04-083220954ND
2015-04-20126335922.00 ppb
2015-05-1912750086ND
2015-05-1912750087ND
2015-07-143282108ND
2015-07-143282104ND
2015-07-143282120ND
2015-07-143282100ND
2015-07-143282096ND
2015-07-143282223ND
2015-07-143282151ND
2015-07-143282092ND
2015-07-143282214ND
2015-07-143282138ND
2015-07-143282112ND
2015-07-143282169ND
2015-07-143282129ND
2015-07-1432821780.200 ppb
2015-07-143282187ND
2015-07-143282147ND
2015-07-143282246ND
2015-07-143282160ND
2015-07-143282196ND
2015-07-203283344ND
2015-07-203283340ND
2015-08-103296367ND
2015-08-1032963731.50 ppb
2015-10-073336889ND
2015-10-073336893ND
2015-12-09136339022.00 ppb
2016-08-23149079381.000 ppb