The Power of Information

National Drinking Water Database


San Jose Water Company Utilities - San Jose, CA


Serves 979,000 people

Barium (total)

Barium is a mineral that enters drinking water through drilling and mining waste runoff, discharges from chemical industries 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
93 days
Tests ConductedNumber of individual tests done for this contaminant
169 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Barium (total)Barium is a mineral that enters drinking water through drilling and mining waste runoff, discharges from chemical industries and erosion of natural deposits.118.03 ppb
280 ppb
No
700 ppb
No
2000 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 Barium (total)

Health Based Limits for Barium (total)

StandardDescriptionLevel
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.700 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.700 ppb
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.1000 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.2000 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.2000 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.2000 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.7000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-240 ppb110 ppb
2009-03-18190 ppb10190 ppb
2009-03-110 ppb110 ppb
2009-02-240 ppb110 ppb
2009-02-090 ppb110 ppb
2008-12-110 ppb110 ppb
2008-11-20190 ppb10190 ppb
2008-11-06140 ppb10140 ppb
2008-11-05210 ppb20200 to 220 ppb
2008-11-030 ppb110 ppb
2008-10-14120 ppb10120 ppb
2008-10-08280 ppb10280 ppb
2008-10-0774.91 ppb1074.91 ppb
2008-09-29210 ppb10210 ppb
2008-09-0987.07 ppb3073.68 to 109.38 ppb
2008-08-120 ppb110 ppb
2008-08-070 ppb220 ppb
2008-08-06220 ppb20190 to 250 ppb
2008-07-0888.52 ppb2077.99 to 99.05 ppb
2008-06-03151.59 ppb20119.73 to 183.45 ppb
2008-05-05210 ppb10210 ppb
2008-04-17110 ppb10110 ppb
2008-04-150 ppb110 ppb
2008-04-08219.33 ppb20133.13 to 305.53 ppb
2008-03-27190 ppb10190 ppb
2008-03-13155 ppb20150 to 160 ppb
2008-03-04201.46 ppb10201.46 ppb
2008-02-11188 ppb10188 ppb
2008-02-0579.32 ppb1079.32 ppb
2008-01-28160 ppb10160 ppb
2008-01-230 ppb110 ppb
2008-01-140 ppb110 ppb
2008-01-10135 ppb210 to 270 ppb
2007-12-04173.37 ppb4092.18 to 252.46 ppb
2007-11-06215.91 ppb30211.1 to 225.06 ppb
2007-10-16102.95 ppb3093.59 to 115.62 ppb
2007-09-120 ppb110 ppb
2007-09-11122.84 ppb2062.3 to 183.38 ppb
2007-08-21210 ppb10210 ppb
2007-08-160 ppb110 ppb
2007-08-14170 ppb10170 ppb
2007-07-10160.13 ppb2078.64 to 241.61 ppb
2007-06-05157.46 ppb7080.83 to 264.18 ppb
2007-05-0894.99 ppb2078.96 to 111.02 ppb
2007-04-19260 ppb10260 ppb
2007-04-03134.37 ppb2081.24 to 187.5 ppb
2007-03-28260 ppb10260 ppb
2007-03-06105.84 ppb2070.82 to 140.86 ppb
2007-03-050 ppb110 ppb
2007-01-30110 ppb10110 ppb
2007-01-0931.62 ppb1031.62 ppb
2006-11-14145.34 ppb20115.02 to 175.67 ppb
2006-10-1793.47 ppb1093.47 ppb
2006-09-12114.37 ppb3066.25 to 169.08 ppb
2006-08-150 ppb110 ppb
2006-08-14160 ppb10160 ppb
2006-08-1055 ppb210 to 110 ppb
2006-07-12211.75 ppb10211.75 ppb
2006-07-1193.89 ppb1093.89 ppb
2006-06-20138.03 ppb2067.19 to 208.87 ppb
2006-05-0965 ppb210 to 130 ppb
2006-04-26200 ppb10200 ppb
2006-03-15230 ppb10230 ppb
2006-02-14190 ppb10190 ppb
2006-01-090 ppb110 ppb
2005-12-21190 ppb10190 ppb
2005-12-0665.5 ppb3051.29 to 82.6 ppb
2005-11-01166.12 ppb20141.56 to 190.67 ppb
2005-10-04107.08 ppb3058.28 to 180.53 ppb
2005-09-2050 ppb210 to 100 ppb
2005-09-150 ppb220 ppb
2005-08-10107.5 ppb420 to 260 ppb
2005-07-210 ppb110 ppb
2005-06-14146.53 ppb20121.14 to 171.92 ppb
2005-04-19178.62 ppb20122.77 to 234.47 ppb
2005-03-15187.66 ppb2085.14 to 290.19 ppb
2005-02-08163.86 ppb10163.86 ppb
2005-01-28260 ppb10260 ppb
2005-01-27133.33 ppb310 to 290 ppb
2004-12-07159.65 ppb30117.71 to 201.26 ppb
2004-11-16164.04 ppb8061.68 to 219.85 ppb
2004-10-19108.64 ppb2073.92 to 143.36 ppb
2004-09-21127.6 ppb5067.83 to 199.13 ppb
2004-08-17105 ppb420 to 220 ppb
2004-07-21241.13 ppb10241.13 ppb
2004-07-2076.82 ppb2071.81 to 81.84 ppb
2004-06-22150.8 ppb5093.29 to 275.19 ppb
2004-05-25110 ppb10110 ppb
2004-05-200 ppb110 ppb
2004-04-20110 ppb310 to 180 ppb
2004-03-1780 ppb210 to 160 ppb
2004-03-16170 ppb20110 to 230 ppb
2004-01-270 ppb220 ppb