The Power of Information

National Drinking Water Database

San Jose Water Company Utilities - San Jose, CA

Serves 979,000 people


o-Dichlorobenzene (1,2-Dichlorobenzene) is an intermediate for making herbicides; it is discharged as a pollutant from the manufacture of agricultural chemicals.
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
272 days
Tests ConductedNumber of individual tests done for this contaminant
401 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
o-Dichlorobenzeneo-Dichlorobenzene (1,2-Dichlorobenzene) is an intermediate for making herbicides; it is discharged as a pollutant from the manufacture of agricultural chemicals.0 ppb
0 ppb
420 ppb
600 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 o-Dichlorobenzene

Health Based Limits for o-Dichlorobenzene

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.420 ppb
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.600 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.600 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.600 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.600 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.3000 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.9000 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.9000 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-240 ppb220 ppb
2009-03-230 ppb110 ppb
2009-03-200 ppb110 ppb
2009-03-180 ppb220 ppb
2009-03-110 ppb110 ppb
2009-02-250 ppb220 ppb
2009-02-230 ppb110 ppb
2009-02-030 ppb110 ppb
2009-01-270 ppb110 ppb
2009-01-210 ppb110 ppb
2009-01-140 ppb220 ppb
2009-01-070 ppb110 ppb
2009-01-060 ppb220 ppb
2008-12-150 ppb220 ppb
2008-12-110 ppb110 ppb
2008-11-200 ppb220 ppb
2008-11-190 ppb110 ppb
2008-11-180 ppb110 ppb
2008-11-050 ppb110 ppb
2008-11-030 ppb110 ppb
2008-10-080 ppb220 ppb
2008-10-070 ppb220 ppb
2008-10-060 ppb220 ppb
2008-09-230 ppb220 ppb
2008-09-180 ppb110 ppb
2008-09-100 ppb110 ppb
2008-09-090 ppb330 ppb
2008-08-200 ppb110 ppb
2008-08-130 ppb110 ppb
2008-08-120 ppb220 ppb
2008-08-070 ppb220 ppb
2008-08-060 ppb220 ppb
2008-08-050 ppb220 ppb
2008-07-150 ppb110 ppb
2008-07-140 ppb110 ppb
2008-07-070 ppb330 ppb
2008-07-020 ppb220 ppb
2008-07-010 ppb110 ppb
2008-06-260 ppb110 ppb
2008-06-180 ppb110 ppb
2008-05-140 ppb330 ppb
2008-05-130 ppb110 ppb
2008-05-080 ppb220 ppb
2008-05-060 ppb110 ppb
2008-05-050 ppb110 ppb
2008-04-290 ppb110 ppb
2008-04-240 ppb220 ppb
2008-04-170 ppb220 ppb
2008-04-160 ppb110 ppb
2008-04-150 ppb110 ppb
2008-04-070 ppb110 ppb
2008-03-270 ppb110 ppb
2008-03-200 ppb110 ppb
2008-03-130 ppb220 ppb
2008-03-110 ppb110 ppb
2008-03-060 ppb220 ppb
2008-03-040 ppb110 ppb
2008-02-280 ppb110 ppb
2008-02-260 ppb110 ppb
2008-02-190 ppb220 ppb
2008-02-120 ppb110 ppb
2008-02-110 ppb110 ppb
2008-01-230 ppb110 ppb
2008-01-140 ppb220 ppb
2008-01-100 ppb110 ppb
2007-12-270 ppb110 ppb
2007-12-180 ppb110 ppb
2007-12-120 ppb110 ppb
2007-12-110 ppb110 ppb
2007-12-050 ppb110 ppb
2007-11-270 ppb110 ppb
2007-11-200 ppb220 ppb
2007-11-150 ppb110 ppb
2007-11-080 ppb110 ppb
2007-11-050 ppb110 ppb
2007-10-250 ppb110 ppb
2007-10-180 ppb110 ppb
2007-10-160 ppb110 ppb
2007-10-100 ppb110 ppb
2007-10-040 ppb110 ppb
2007-10-020 ppb330 ppb
2007-09-120 ppb440 ppb
2007-09-110 ppb440 ppb
2007-08-220 ppb110 ppb
2007-08-210 ppb110 ppb
2007-08-150 ppb110 ppb
2007-08-140 ppb110 ppb
2007-08-080 ppb220 ppb
2007-08-070 ppb220 ppb
2007-07-170 ppb110 ppb
2007-07-110 ppb110 ppb
2007-07-100 ppb110 ppb
2007-06-280 ppb110 ppb
2007-06-200 ppb110 ppb
2007-06-180 ppb110 ppb
2007-06-120 ppb110 ppb
2007-06-050 ppb220 ppb
2007-05-150 ppb110 ppb
2007-05-020 ppb220 ppb
2007-05-010 ppb220 ppb
2007-04-250 ppb110 ppb
2007-04-190 ppb110 ppb
2007-04-180 ppb110 ppb
2007-04-170 ppb110 ppb
2007-04-040 ppb220 ppb
2007-04-030 ppb110 ppb
2007-03-280 ppb110 ppb
2007-03-200 ppb110 ppb
2007-03-150 ppb110 ppb
2007-03-080 ppb110 ppb
2007-03-060 ppb550 ppb
2007-03-050 ppb110 ppb
2007-02-070 ppb110 ppb
2007-02-050 ppb110 ppb
2007-02-010 ppb110 ppb
2007-01-300 ppb110 ppb
2007-01-290 ppb110 ppb
2007-01-240 ppb110 ppb
2007-01-090 ppb110 ppb
2006-12-120 ppb110 ppb
2006-11-160 ppb110 ppb
2006-11-140 ppb110 ppb
2006-11-080 ppb220 ppb
2006-10-180 ppb110 ppb
2006-10-100 ppb110 ppb
2006-10-050 ppb110 ppb
2006-10-040 ppb110 ppb
2006-09-120 ppb330 ppb
2006-09-070 ppb220 ppb
2006-08-210 ppb110 ppb
2006-08-160 ppb110 ppb
2006-08-150 ppb220 ppb
2006-08-100 ppb220 ppb
2006-08-080 ppb220 ppb
2006-08-020 ppb110 ppb
2006-07-180 ppb110 ppb
2006-07-130 ppb220 ppb
2006-07-120 ppb330 ppb
2006-07-100 ppb110 ppb
2006-06-060 ppb220 ppb
2006-05-180 ppb110 ppb
2006-05-100 ppb110 ppb
2006-05-040 ppb110 ppb
2006-05-030 ppb330 ppb
2006-04-250 ppb110 ppb
2006-04-170 ppb110 ppb
2006-04-130 ppb110 ppb
2006-04-120 ppb110 ppb
2006-04-110 ppb110 ppb
2006-03-200 ppb110 ppb
2006-03-150 ppb110 ppb
2006-03-140 ppb220 ppb
2006-03-090 ppb110 ppb
2006-03-080 ppb110 ppb
2006-02-140 ppb220 ppb
2006-02-130 ppb110 ppb
2006-01-240 ppb110 ppb
2006-01-120 ppb110 ppb
2006-01-090 ppb110 ppb
2006-01-050 ppb330 ppb
2006-01-040 ppb110 ppb
2005-12-210 ppb110 ppb
2005-12-200 ppb110 ppb
2005-12-190 ppb110 ppb
2005-12-140 ppb330 ppb
2005-12-130 ppb110 ppb
2005-12-070 ppb110 ppb
2005-11-160 ppb220 ppb
2005-11-150 ppb110 ppb
2005-11-020 ppb110 ppb
2005-10-200 ppb110 ppb
2005-10-180 ppb110 ppb
2005-10-120 ppb110 ppb
2005-10-060 ppb110 ppb
2005-10-040 ppb330 ppb
2005-10-030 ppb110 ppb
2005-09-280 ppb440 ppb
2005-09-210 ppb220 ppb
2005-09-200 ppb110 ppb
2005-09-150 ppb440 ppb
2005-08-190 ppb110 ppb
2005-08-150 ppb110 ppb
2005-08-110 ppb220 ppb
2005-08-100 ppb770 ppb
2005-08-080 ppb110 ppb
2005-07-260 ppb220 ppb
2005-07-210 ppb220 ppb
2005-07-200 ppb110 ppb
2005-07-190 ppb110 ppb
2005-07-140 ppb110 ppb
2005-07-070 ppb110 ppb
2005-06-210 ppb110 ppb
2005-06-140 ppb330 ppb
2005-06-130 ppb110 ppb
2005-06-090 ppb110 ppb
2005-06-070 ppb220 ppb
2005-06-060 ppb110 ppb
2005-06-010 ppb220 ppb
2005-05-250 ppb110 ppb
2005-05-240 ppb110 ppb
2005-05-030 ppb220 ppb
2005-05-020 ppb220 ppb
2005-04-250 ppb220 ppb
2005-04-200 ppb110 ppb
2005-04-190 ppb110 ppb
2005-04-180 ppb220 ppb
2005-04-140 ppb110 ppb
2005-04-050 ppb110 ppb
2005-04-040 ppb110 ppb
2005-03-160 ppb220 ppb
2005-03-140 ppb110 ppb
2005-03-090 ppb220 ppb
2005-03-070 ppb220 ppb
2005-02-020 ppb110 ppb
2005-01-270 ppb110 ppb
2005-01-240 ppb110 ppb
2005-01-200 ppb220 ppb
2005-01-130 ppb220 ppb
2005-01-110 ppb110 ppb
2005-01-040 ppb110 ppb
2004-12-150 ppb110 ppb
2004-12-020 ppb110 ppb
2004-12-010 ppb330 ppb
2004-11-160 ppb550 ppb
2004-11-100 ppb110 ppb
2004-11-040 ppb330 ppb
2004-11-030 ppb220 ppb
2004-11-020 ppb110 ppb
2004-10-220 ppb220 ppb
2004-10-070 ppb110 ppb
2004-10-060 ppb330 ppb
2004-10-050 ppb110 ppb
2004-09-210 ppb440 ppb
2004-09-160 ppb330 ppb
2004-09-150 ppb220 ppb
2004-09-090 ppb220 ppb
2004-08-240 ppb110 ppb
2004-08-230 ppb110 ppb
2004-08-170 ppb110 ppb
2004-08-110 ppb110 ppb
2004-08-090 ppb110 ppb
2004-08-040 ppb330 ppb
2004-08-030 ppb220 ppb
2004-07-210 ppb110 ppb
2004-07-200 ppb110 ppb
2004-07-140 ppb110 ppb
2004-07-090 ppb110 ppb
2004-07-080 ppb110 ppb
2004-06-150 ppb110 ppb
2004-06-100 ppb110 ppb
2004-06-090 ppb220 ppb
2004-06-020 ppb110 ppb
2004-05-260 ppb110 ppb
2004-05-250 ppb220 ppb
2004-05-130 ppb110 ppb
2004-05-110 ppb220 ppb
2004-05-100 ppb220 ppb
2004-04-280 ppb110 ppb
2004-04-270 ppb110 ppb
2004-04-220 ppb110 ppb
2004-04-200 ppb330 ppb
2004-04-060 ppb110 ppb
2004-03-240 ppb110 ppb
2004-03-040 ppb110 ppb
2004-03-020 ppb110 ppb
2004-02-100 ppb110 ppb
2004-02-050 ppb220 ppb
2004-01-270 ppb220 ppb
2004-01-260 ppb110 ppb
2004-01-230 ppb110 ppb
2004-01-210 ppb110 ppb
2004-01-130 ppb110 ppb