The Power of Information

National Drinking Water Database


Suburban Water Systems-San Jose Utilities - Los Angeles, CA


Serves 110,602 people

Chromium (total)

Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
32 days
Tests ConductedNumber of individual tests done for this contaminant
96 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.4.59 ppb
14 ppb
No
100 ppb
No
100 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Chromium (total)

Health Based Limits for Chromium (total)

StandardDescriptionLevel
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.100 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.100 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.1000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-120 ppb110 ppb
2009-02-170 ppb110 ppb
2008-08-147 ppb210 to 14 ppb
2008-05-190 ppb110 ppb
2008-02-050 ppb110 ppb
2006-12-1214 ppb1014 ppb
2006-03-130 ppb110 ppb
2005-12-1410 ppb1010 ppb
2005-10-100 ppb110 ppb
2005-10-030 ppb110 ppb
2005-09-1912 ppb1012 ppb
2005-04-220 ppb220 ppb
2005-04-210 ppb110 ppb
2005-04-147.67 ppb310 to 13 ppb
2005-03-100 ppb110 ppb
2005-03-097.33 ppb310 to 12 ppb
2005-02-096 ppb420 to 13 ppb
2005-02-040 ppb110 ppb
2004-12-2110 ppb3010 ppb
2004-12-177 ppb210 to 14 ppb
2004-12-085.5 ppb420 to 12 ppb
2004-11-126 ppb420 to 13 ppb
2004-10-075.5 ppb420 to 12 ppb
2004-09-165.5 ppb420 to 12 ppb
2004-08-112.75 ppb430 to 11 ppb
2004-07-095.9 ppb830 to 11 ppb
2004-06-035.15 ppb830 to 10 ppb
2004-05-075.13 ppb420 to 12 ppb
2004-03-035.98 ppb830 to 11 ppb
2004-02-096 ppb210 to 12 ppb
2004-02-056.18 ppb620 to 11 ppb
2004-01-086.2 ppb830 to 12 ppb