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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

San Antonio Water System

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

MORE ABOUT THIS CONTAMINANT

 

145

Samples

0

Samples exceeding legal limit (MCL)

136

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20150.136 ppb145136ND - 1.80 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2015-03-09201503110220AM0.140 ppb
2015-03-09201503110222AMND
2015-03-09201503110218AM0.130 ppb
2015-03-10201502090218AM0.0650 ppb
2015-03-10201502090158AM0.0610 ppb
2015-03-10201502090197AM0.0300 ppb
2015-03-10201502090234AM0.0420 ppb
2015-03-10201502090223AM0.0710 ppb
2015-03-10201502090159AM0.0840 ppb
2015-03-10201502090139AM0.0970 ppb
2015-03-10201502090242AM0.0750 ppb
2015-03-10201502090174AM0.0660 ppb
2015-03-10201502090208AM0.500 ppb
2015-03-10201503120197AM0.0740 ppb
2015-03-10201503120199AM0.0460 ppb
2015-03-10201502090152AM0.0860 ppb
2015-03-10201502090256AM0.0480 ppb
2015-03-10201502090236AM0.0670 ppb
2015-03-10201502090284AM0.0900 ppb
2015-03-10201502090209AMND
2015-03-10201502090244AMND
2015-03-10201502090225AM0.0870 ppb
2015-03-10201502090226AMND
2015-03-10201502090163AM0.0530 ppb
2015-03-10201502090190AM0.0500 ppb
2015-03-10201502090191AM0.0880 ppb
2015-03-10201502090153AM0.560 ppb
2015-03-10201502090180AM0.0910 ppb
2015-03-10201502090151AM0.0680 ppb
2015-03-10201502090272AM0.0900 ppb
2015-03-10201502090270AM0.0860 ppb
2015-03-10201502090205AM0.0480 ppb
2015-03-10201502090171AM0.0340 ppb
2015-03-11201502090157AM0.120 ppb
2015-03-11201502090276AM0.120 ppb
2015-03-11201502090263AM0.0540 ppb
2015-03-11201502090243AM0.150 ppb
2015-03-11201502090240AM0.0950 ppb
2015-03-11201502090233AM0.110 ppb
2015-03-11201502090196AM0.110 ppb
2015-03-11201502090251AM0.1000 ppb
2015-03-11201502090206AM0.1000 ppb
2015-03-11201502090241AM0.0900 ppb
2015-03-11201503140108AM0.180 ppb
2015-03-11201503140112AM0.0650 ppb
2015-03-11201503140114AM0.120 ppb
2015-03-11201503140110AM0.130 ppb
2015-03-11201502090248AM0.120 ppb
2015-03-11201502090237AM0.130 ppb
2015-03-11201502090175AM0.0980 ppb
2015-03-11201502090235AM0.0520 ppb
2015-03-11201502090224AM0.0900 ppb
2015-03-11201502090145AM0.0580 ppb
2015-03-11201502090147AM0.140 ppb
2015-03-11201502090143AM0.0640 ppb
2015-03-11201502090162AM0.0700 ppb
2015-03-11201502090148AM0.0960 ppb
2015-03-11201502090187AM0.0760 ppb
2015-03-12201503140088AM0.0480 ppb
2015-03-12201503140106AM0.140 ppb
2015-03-12201503140102AM0.140 ppb
2015-03-12201503140104AM0.140 ppb
2015-03-12201503140090AM0.180 ppb
2015-03-12201503140100AM0.240 ppb
2015-03-13201503140210AM1.80 ppb
2015-03-13201503140208AM0.130 ppb
2015-06-29201506300301AM0.0320 ppb
2015-06-29201506300299AMND
2015-09-14201508270375AM0.0420 ppb
2015-09-14201508270381AM0.140 ppb
2015-09-14201508270380AM0.0770 ppb
2015-09-14201508270371AM0.170 ppb
2015-09-14201508270398AM0.160 ppb
2015-09-14201508270400AMND
2015-09-14201508270399AM0.510 ppb
2015-09-14201508270386AM0.150 ppb
2015-09-14201508270366AM0.120 ppb
2015-09-14201508270518AM0.200 ppb
2015-09-14201508270454AM0.510 ppb
2015-09-14201508270456AM0.150 ppb
2015-09-14201508270478AM0.130 ppb
2015-09-14201508270470AMND
2015-09-14201508270476AM0.590 ppb
2015-09-14201508270475AM0.380 ppb
2015-09-14201508270460AM0.0500 ppb
2015-09-14201508270453AM0.510 ppb
2015-09-14201508270455AM0.150 ppb
2015-09-14201508270452AM0.240 ppb
2015-09-14201508270444AM0.260 ppb
2015-09-15201508270359AM0.0880 ppb
2015-09-15201508270378AM0.0640 ppb
2015-09-15201508270376AM0.0760 ppb
2015-09-15201508270382AM0.1000 ppb
2015-09-15201508270383AM0.0720 ppb
2015-09-15201508270368AM0.120 ppb
2015-09-15201508270374AM0.0810 ppb
2015-09-15201508270369AM0.110 ppb
2015-09-15201509170012AM0.110 ppb
2015-09-15201508270372AM0.0960 ppb
2015-09-15201508270373AM0.0960 ppb
2015-09-15201508270370AM0.0920 ppb
2015-09-15201508270396AM0.0420 ppb
2015-09-15201508270401AMND
2015-09-15201508270385AM0.0880 ppb
2015-09-15201508270463AM0.0920 ppb
2015-09-15201508270477AM0.0780 ppb
2015-09-15201508270469AM0.0930 ppb
2015-09-15201508270472AM0.0880 ppb
2015-09-15201508270461AM0.130 ppb
2015-09-15201508270464AM0.0830 ppb
2015-09-15201508270462AM0.130 ppb
2015-09-15201508270459AM0.0700 ppb
2015-09-16201508270363AM0.120 ppb
2015-09-16201508270379AM0.0370 ppb
2015-09-16201508270367AM0.120 ppb
2015-09-16201508270387AM0.120 ppb
2015-09-16201508270384AM0.1000 ppb
2015-09-16201508270394AM0.0680 ppb
2015-09-16201508270395AM0.1000 ppb
2015-09-16201508270392AM0.770 ppb
2015-09-16201508270471AM0.0630 ppb
2015-09-16201508270473AM0.0730 ppb
2015-09-16201508270474AM0.0510 ppb
2015-09-16201508270468AM0.0900 ppb
2015-09-16201508270467AM0.0660 ppb
2015-09-16201508270465AM0.0590 ppb
2015-09-16201508270466AM0.0590 ppb
2015-09-16201508270442AM0.0800 ppb
2015-09-17201508270364AM0.120 ppb
2015-09-17201508270377AM0.140 ppb
2015-09-17201509180417AM0.0610 ppb
2015-09-17201508270389AM0.120 ppb
2015-09-17201508270457AM0.220 ppb
2015-09-17201508270458AM0.220 ppb
2015-09-17201508270446AM0.540 ppb
2015-09-17201508270448AM0.0960 ppb
2015-09-17201508270449AM0.150 ppb
2015-09-17201509180371AM0.220 ppb
2015-09-17201508270447AM0.1000 ppb
2015-09-17201508270441AM0.190 ppb
2015-09-17201508270443AM0.160 ppb
2015-09-17201508270451AM0.220 ppb
2015-09-18201508270445AM0.200 ppb
2015-12-04201512050174AM0.0420 ppb
2015-12-04201512050172AMND