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National Drinking Water Database


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

Serves 110,602 people

n-Nitrosodimethylamine

n-Nitrosodimethylamine is a carcinogenic water contaminant released from various industrial processes; it also forms in drinking water as disinfection byproduct of chloramination and from agricultural runoff.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
121 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
244 days
Tests ConductedNumber of individual tests done for this contaminant
436 tests

Testing Summary

ContaminantAverage/
Maximum
Result		Health Limit
Exceeded		Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
n-Nitrosodimethylaminen-Nitrosodimethylamine is a carcinogenic water contaminant released from various industrial processes; it also forms in drinking water as disinfection byproduct of chloramination and from agricultural runoff.<0.01 ppb
0.03 ppb		Yes
<0.01 ppb		Legal at any levelThis is the Federal Limit. State Limits may be lower.
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 n-Nitrosodimethylamine

Health Based Limits for n-Nitrosodimethylamine

StandardDescriptionLevel
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.<0.01 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.<0.01 ppb-0.07 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.<0.01 ppb

Testing Results

Testing DateAverage
Result		Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-300 ppb110 ppb
2009-03-190 ppb110 ppb
2009-03-120 ppb110 ppb
2009-03-040 ppb550 ppb
2009-03-03<0.01 ppb21< .01 to 0.006 ppb
2009-02-26<0.01 ppb21< .01 to 0.009 ppb
2009-02-050 ppb330 ppb
2009-02-020 ppb110 ppb
2009-01-23<0.01 ppb10< .01 to 0.003 ppb
2009-01-19<0.01 ppb20<0.01 to 0.01 ppb
2009-01-130 ppb550 ppb
2009-01-120 ppb110 ppb
2008-12-310 ppb220 ppb
2008-11-07<0.01 ppb10< .01 to 0.003 ppb
2008-11-060 ppb550 ppb
2008-11-050 ppb110 ppb
2008-10-30<0.01 ppb10< .01 to 0.005 ppb
2008-10-27<0.01 ppb10< .01 to 0.004 ppb
2008-10-25<0.01 ppb10< .01 to 0.004 ppb
2008-10-21<0.01 ppb10< .01 to 0.003 ppb
2008-10-20<0.01 ppb10< .01 to 0.004 ppb
2008-10-13<0.01 ppb10< .01 to 0.003 ppb
2008-10-08<0.01 ppb650 to 0.01 ppb
2008-10-06<0.01 ppb10< .01 to 0.003 ppb
2008-10-02<0.01 ppb10< .01 to 0.004 ppb
2008-10-01<0.01 ppb10< .01 to 0.003 ppb
2008-09-29<0.01 ppb10< .01 to 0.003 ppb
2008-09-22<0.01 ppb10< .01 to 0.004 ppb
2008-09-20<0.01 ppb10< .01 to 0.005 ppb
2008-09-17<0.01 ppb10< .01 to 0.003 ppb
2008-09-15<0.01 ppb10< .01 to 0.004 ppb
2008-09-10<0.01 ppb650 to 0.01 ppb
2008-09-08<0.01 ppb10< .01 to 0.003 ppb
2008-09-03<0.01 ppb10< .01 to 0.004 ppb
2008-09-02<0.01 ppb10< .01 to 0.003 ppb
2008-08-29<0.01 ppb10< .01 to 0.003 ppb
2008-08-25<0.01 ppb10< .01 to 0.004 ppb
2008-08-22<0.01 ppb10< .01 to 0.003 ppb
2008-08-21<0.01 ppb10< .01 to 0.004 ppb
2008-08-19<0.01 ppb10< .01 to 0.003 ppb
2008-08-18<0.01 ppb10< .01 to 0.003 ppb
2008-08-14<0.01 ppb10< .01 to 0.002 ppb
2008-08-11<0.01 ppb10< .01 to 0.003 ppb
2008-08-06<0.01 ppb650 to 0.01 ppb
2008-08-040 ppb110 ppb
2008-07-280 ppb110 ppb
2008-07-25<0.01 ppb10< .01 to 0.002 ppb
2008-07-210 ppb110 ppb
2008-07-140 ppb110 ppb
2008-07-090 ppb440 ppb
2008-07-07<0.01 ppb32< .01 to 0.008 ppb
2008-06-30<0.01 ppb10< .01 to 0.002 ppb
2008-06-23<0.01 ppb10< .01 to 0.003 ppb
2008-06-16<0.01 ppb10< .01 to 0.002 ppb
2008-06-09<0.01 ppb64< .01 to 0.008 ppb
2008-06-02<0.01 ppb10< .01 to 0.002 ppb
2008-05-270 ppb110 ppb
2008-05-230 ppb110 ppb
2008-05-19<0.01 ppb10< .01 to 0.005 ppb
2008-05-12<0.01 ppb10< .01 to 0.003 ppb
2008-05-080 ppb110 ppb
2008-05-07<0.01 ppb320 to 0.01 ppb
2008-05-060 ppb220 ppb
2008-05-05<0.01 ppb10< .01 to 0.003 ppb
2008-04-29<0.01 ppb10< .01 to 0.003 ppb
2008-04-28<0.01 ppb10< .01 to 0.002 ppb
2008-04-25<0.01 ppb10< .01 to 0.003 ppb
2008-04-24<0.01 ppb10< .01 to 0.003 ppb
2008-04-22<0.01 ppb10< .01 to 0.002 ppb
2008-04-210 ppb110 ppb
2008-04-140 ppb110 ppb
2008-04-07<0.01 ppb54< .01 to 0.007 ppb
2008-03-31<0.01 ppb10< .01 to 0.002 ppb
2008-03-240 ppb220 ppb
2008-03-170 ppb110 ppb
2008-03-11<0.01 ppb10< .01 to 0.007 ppb
2008-03-100 ppb110 ppb
2008-03-070 ppb110 ppb
2008-03-050 ppb440 ppb
2008-03-030 ppb110 ppb
2008-02-250 ppb110 ppb
2008-02-190 ppb110 ppb
2008-02-11<0.01 ppb650 to 0.01 ppb
2008-02-050 ppb110 ppb
2008-02-020 ppb110 ppb
2008-01-300 ppb220 ppb
2008-01-280 ppb110 ppb
2008-01-240 ppb110 ppb
2008-01-210 ppb110 ppb
2008-01-160 ppb110 ppb
2008-01-070 ppb110 ppb
2008-01-060 ppb110 ppb
2008-01-02<0.01 ppb54< .01 to 0.006 ppb
2007-12-310 ppb110 ppb
2007-12-270 ppb330 ppb
2007-12-170 ppb110 ppb
2007-12-11<0.01 ppb20< .01 to 0.006 ppb
2007-12-060 ppb330 ppb
2007-12-030 ppb110 ppb
2007-11-28<0.01 ppb62< .01 to 0.007 ppb
2007-11-26<0.01 ppb10< .01 to 0.002 ppb
2007-11-190 ppb220 ppb
2007-11-160 ppb110 ppb
2007-11-13<0.01 ppb20< .01 to 0.005 ppb
2007-11-120 ppb110 ppb
2007-11-080 ppb660 ppb
2007-11-050 ppb110 ppb
2007-10-290 ppb220 ppb
2007-10-260 ppb110 ppb
2007-10-25<0.01 ppb10< .01 to 0.003 ppb
2007-10-230 ppb110 ppb
2007-10-220 ppb110 ppb
2007-10-17<0.01 ppb21< .01 to 0.004 ppb
2007-10-150 ppb110 ppb
2007-10-090 ppb220 ppb
2007-10-08<0.01 ppb54< .01 to 0.002 ppb
2007-10-01<0.01 ppb10< .01 to 0.003 ppb
2007-09-240 ppb220 ppb
2007-09-170 ppb110 ppb
2007-09-12<0.01 ppb32< .01 to 0.006 ppb
2007-09-110 ppb440 ppb
2007-09-100 ppb110 ppb
2007-09-040 ppb110 ppb
2007-08-270 ppb110 ppb
2007-08-130 ppb110 ppb
2007-08-080 ppb550 ppb
2007-08-070 ppb110 ppb
2007-07-300 ppb110 ppb
2007-07-250 ppb110 ppb
2007-07-190 ppb220 ppb
2007-07-110 ppb110 ppb
2007-07-10<0.01 ppb43< .01 to 0.007 ppb
2007-07-050 ppb220 ppb
2007-07-02<0.01 ppb10< .01 to 0.003 ppb
2007-06-25<0.01 ppb10< .01 to 0.004 ppb
2007-06-21<0.01 ppb10< .01 to 0.003 ppb
2007-06-18<0.01 ppb10< .01 to 0.003 ppb
2007-06-11<0.01 ppb10< .01 to 0.003 ppb
2007-06-080 ppb110 ppb
2007-06-07<0.01 ppb53< .01 to 0.005 ppb
2007-06-04<0.01 ppb10< .01 to 0.003 ppb
2007-05-21<0.01 ppb10< .01 to 0.003 ppb
2007-05-140 ppb110 ppb
2007-05-090 ppb440 ppb
2007-05-07<0.01 ppb10< .01 to 0.002 ppb
2007-04-23<0.01 ppb10< .01 to 0.002 ppb
2007-04-160 ppb110 ppb
2007-04-090 ppb110 ppb
2007-04-04<0.01 ppb43< .01 to 0.004 ppb
2007-04-02<0.01 ppb21< .01 to 0.004 ppb
2007-03-30<0.01 ppb21< .01 to 0.004 ppb
2007-03-260 ppb110 ppb
2007-03-22<0.01 ppb10< .01 to 0.003 ppb
2007-03-19<0.01 ppb10< .01 to 0.002 ppb
2007-03-120 ppb110 ppb
2007-03-07<0.01 ppb43< .01 to 0.005 ppb
2007-03-050 ppb110 ppb
2007-02-260 ppb110 ppb
2007-02-20<0.01 ppb10< .01 to 0.003 ppb
2007-02-12<0.01 ppb10< .01 to 0.002 ppb
2007-02-07<0.01 ppb43< .01 to 0.003 ppb
2007-02-050 ppb110 ppb
2007-01-290 ppb110 ppb
2007-01-220 ppb110 ppb
2007-01-150 ppb110 ppb
2007-01-08<0.01 ppb10< .01 to 0.003 ppb
2007-01-03<0.01 ppb42< .01 to 0.004 ppb
2007-01-02<0.01 ppb10< .01 to 0.003 ppb
2006-12-260 ppb110 ppb
2006-12-190 ppb110 ppb
2006-12-110 ppb110 ppb
2006-12-060 ppb110 ppb
2006-12-040 ppb110 ppb
2006-12-010 ppb110 ppb
2006-11-29<0.01 ppb10< .01 to 0.002 ppb
2006-11-270 ppb110 ppb
2006-11-13<0.01 ppb54< .01 to 0.002 ppb
2006-11-060 ppb110 ppb
2006-10-300 ppb110 ppb
2006-10-230 ppb110 ppb
2006-10-160 ppb110 ppb
2006-10-090 ppb110 ppb
2006-10-040 ppb550 ppb
2006-10-020 ppb110 ppb
2006-09-290 ppb110 ppb
2006-09-280 ppb110 ppb
2006-09-07<0.01 ppb32< .01 to 0.003 ppb
2006-09-060 ppb220 ppb
2006-08-31<0.01 ppb10< .01 to 0.003 ppb
2006-08-260 ppb110 ppb
2006-08-150 ppb110 ppb
2006-08-090 ppb110 ppb
2006-08-030 ppb110 ppb
2006-08-02<0.01 ppb43< .01 to 0.003 ppb
2006-07-13<0.01 ppb32< .01 to 0.004 ppb
2006-07-06<0.01 ppb43< .01 to 0.003 ppb
2006-06-28<0.01 ppb43< .01 to 0.002 ppb
2006-06-19<0.01 ppb43< .01 to 0.003 ppb
2006-06-160 ppb110 ppb
2006-06-140 ppb110 ppb
2006-06-13<0.01 ppb41< .01 to 0.004 ppb
2006-06-080 ppb550 ppb
2006-05-040 ppb110 ppb
2006-05-030 ppb110 ppb
2006-05-02<0.01 ppb32< .01 to 0.004 ppb
2006-04-180 ppb110 ppb
2006-04-13<0.01 ppb21< .01 to 0.004 ppb
2006-04-110 ppb110 ppb
2006-03-130 ppb330 ppb
2006-02-08<0.01 ppb21< .01 to 0.005 ppb
2006-01-05<0.01 ppb21< .01 to 0.003 ppb
2005-12-050 ppb440 ppb
2005-11-07<0.01 ppb54< .01 to 0.003 ppb
2005-10-100 ppb110 ppb
2005-10-03<0.01 ppb10< .01 to 0.003 ppb
2005-04-21<0.01 ppb10< .01 to 0.002 ppb
2005-04-140 ppb330 ppb
2005-02-090 ppb330 ppb
2004-12-210.03 ppb200.03 to 0.04 ppb
2004-07-09<0.01 ppb43< .01 to 0.006 ppb
2004-06-210 ppb110 ppb
2004-06-03<0.01 ppb43< .01 to 0.005 ppb
2004-05-07<0.01 ppb32< .01 to 0.008 ppb
2004-05-03<0.01 ppb10< .01 to 0.003 ppb
2004-04-26<0.01 ppb10< .01 to 0.003 ppb
2004-04-19<0.01 ppb10< .01 to 0.004 ppb
2004-04-13<0.01 ppb10< .01 to 0.004 ppb
2004-04-06<0.01 ppb10< .01 to 0.004 ppb
2004-03-31<0.01 ppb10< .01 to 0.003 ppb
2004-03-23<0.01 ppb10< .01 to 0.004 ppb
2004-03-17<0.01 ppb10< .01 to 0.003 ppb
2004-03-09<0.01 ppb10< .01 to 0.005 ppb
2004-03-03<0.01 ppb43< .01 to 0.008 ppb
2004-03-010 ppb110 ppb
2004-02-24<0.01 ppb10< .01 to 0.005 ppb
2004-02-17<0.01 ppb10< .01 to 0.004 ppb
2004-02-12<0.01 ppb10< .01 to 0.005 ppb
2004-02-090 ppb110 ppb
2004-02-05<0.01 ppb42< .01 to 0.008 ppb
2004-01-27<0.01 ppb10< .01 to 0.004 ppb
2004-01-21<0.01 ppb10< .01 to 0.005 ppb
2004-01-13<0.01 ppb10< .01 to 0.005 ppb
2004-01-08<0.01 ppb43< .01 to 0.008 ppb
2004-01-070 ppb110 ppb