The Power of Information

National Drinking Water Database

City of Fresno Water Division Utilities - Fresno, CA

Serves 390,350 people


Trichloroethylene is used to remove grease from fabricated metal parts and in the production of some textiles; this pollutant comes from metal degreasing sites, metal finishing and rubber processing industries.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
39 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)
1 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
237 days
Tests ConductedNumber of individual tests done for this contaminant
593 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
TrichloroethyleneTrichloroethylene is used to remove grease from fabricated metal parts and in the production of some textiles; this pollutant comes from metal degreasing sites, metal finishing and rubber processing industries.0.3 ppb
5.2 ppb
MCLGA 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.: 0 ppb
5 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 Trichloroethylene

Health Based Limits for Trichloroethylene

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.0 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.0.03 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.1.7 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.3 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.5 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.200 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.300 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-04-063.6 ppb103.6 ppb
2009-03-304 ppb104 ppb
2009-03-243.5 ppb103.5 ppb
2009-03-090 ppb550 ppb
2009-03-030.67 ppb320 to 2 ppb
2009-02-100 ppb550 ppb
2009-02-020.27 ppb320 to 0.82 ppb
2009-01-080 ppb770 ppb
2009-01-070 ppb110 ppb
2008-12-100 ppb110 ppb
2008-12-090 ppb550 ppb
2008-12-030 ppb220 ppb
2008-11-210 ppb110 ppb
2008-11-130 ppb550 ppb
2008-11-060 ppb110 ppb
2008-11-050 ppb220 ppb
2008-10-090 ppb550 ppb
2008-10-080 ppb220 ppb
2008-10-070 ppb110 ppb
2008-09-080 ppb550 ppb
2008-09-030 ppb220 ppb
2008-08-110 ppb220 ppb
2008-08-070 ppb220 ppb
2008-07-140 ppb550 ppb
2008-07-070 ppb220 ppb
2008-07-010 ppb330 ppb
2008-06-130 ppb220 ppb
2008-06-100 ppb550 ppb
2008-06-060 ppb110 ppb
2008-06-050 ppb220 ppb
2008-05-280 ppb110 ppb
2008-05-092.9 ppb210 to 5.8 ppb
2008-05-080 ppb550 ppb
2008-04-282.55 ppb201.4 to 3.7 ppb
2008-04-212.6 ppb201.4 to 3.8 ppb
2008-04-153.8 ppb103.8 ppb
2008-04-141.4 ppb101.4 ppb
2008-04-080.6 ppb210 to 1.2 ppb
2008-04-040 ppb550 ppb
2008-04-010.17 ppb320 to 0.5 ppb
2008-03-110.24 ppb320 to 0.72 ppb
2008-03-060 ppb550 ppb
2008-02-120 ppb220 ppb
2008-02-060 ppb550 ppb
2008-02-040 ppb110 ppb
2008-01-090 ppb550 ppb
2008-01-030 ppb330 ppb
2007-12-060 ppb550 ppb
2007-12-050 ppb330 ppb
2007-11-080 ppb660 ppb
2007-11-070 ppb220 ppb
2007-10-040 ppb550 ppb
2007-10-030 ppb330 ppb
2007-09-120 ppb220 ppb
2007-09-100 ppb440 ppb
2007-09-070 ppb110 ppb
2007-09-050 ppb110 ppb
2007-08-210 ppb110 ppb
2007-08-130 ppb110 ppb
2007-08-070 ppb550 ppb
2007-08-060 ppb110 ppb
2007-08-020 ppb110 ppb
2007-07-120 ppb550 ppb
2007-07-100.53 ppb320 to 1.6 ppb
2007-07-030 ppb550 ppb
2007-06-130 ppb110 ppb
2007-06-050 ppb330 ppb
2007-05-300 ppb110 ppb
2007-05-220 ppb110 ppb
2007-05-170 ppb110 ppb
2007-05-030 ppb110 ppb
2007-05-020 ppb110 ppb
2007-05-010 ppb550 ppb
2007-04-030 ppb660 ppb
2007-04-020 ppb110 ppb
2007-03-273.5 ppb103.5 ppb
2007-03-213.6 ppb103.6 ppb
2007-03-140 ppb110 ppb
2007-03-060 ppb550 ppb
2007-03-050 ppb110 ppb
2007-02-200 ppb110 ppb
2007-02-140 ppb110 ppb
2007-02-070 ppb550 ppb
2007-02-050 ppb110 ppb
2007-02-010 ppb110 ppb
2007-01-290 ppb110 ppb
2007-01-220 ppb110 ppb
2007-01-170 ppb110 ppb
2007-01-100 ppb550 ppb
2007-01-080 ppb110 ppb
2007-01-030 ppb220 ppb
2006-12-260 ppb110 ppb
2006-12-180 ppb110 ppb
2006-12-140 ppb550 ppb
2006-12-110 ppb110 ppb
2006-12-070 ppb110 ppb
2006-12-040 ppb110 ppb
2006-11-100 ppb550 ppb
2006-11-012.3 ppb310 to 5.8 ppb
2006-10-110 ppb550 ppb
2006-10-042.5 ppb102.5 ppb
2006-10-030 ppb110 ppb
2006-10-020 ppb110 ppb
2006-09-150 ppb550 ppb
2006-09-081.3 ppb101.3 ppb
2006-09-070 ppb220 ppb
2006-08-100 ppb660 ppb
2006-08-030 ppb330 ppb
2006-07-100 ppb550 ppb
2006-07-050 ppb330 ppb
2006-06-290 ppb110 ppb
2006-06-200 ppb220 ppb
2006-06-120 ppb770 ppb
2006-06-060 ppb330 ppb
2006-06-020 ppb110 ppb
2006-05-300 ppb110 ppb
2006-05-240 ppb110 ppb
2006-05-230 ppb110 ppb
2006-05-150 ppb220 ppb
2006-05-100 ppb550 ppb
2006-05-080 ppb220 ppb
2006-05-020 ppb220 ppb
2006-05-010 ppb110 ppb
2006-04-250 ppb110 ppb
2006-04-240 ppb110 ppb
2006-04-180 ppb110 ppb
2006-04-170 ppb110 ppb
2006-04-130 ppb550 ppb
2006-04-120 ppb110 ppb
2006-04-060 ppb220 ppb
2006-03-130 ppb550 ppb
2006-03-074.1 ppb104.1 ppb
2006-03-021.35 ppb210 to 2.7 ppb
2006-02-242.5 ppb102.5 ppb
2006-02-070 ppb550 ppb
2006-02-020.36 ppb210 to 0.72 ppb
2006-01-130 ppb550 ppb
2006-01-030.55 ppb210 to 1.1 ppb
2005-12-080 ppb110 ppb
2005-12-070 ppb550 ppb
2005-12-065.2 ppb105.2 ppb
2005-12-020 ppb110 ppb
2005-12-010 ppb220 ppb
2005-11-090 ppb110 ppb
2005-11-072.4 ppb102.4 ppb
2005-11-040 ppb110 ppb
2005-10-050 ppb660 ppb
2005-10-040 ppb220 ppb
2005-09-280.59 ppb100.59 ppb
2005-09-210 ppb110 ppb
2005-09-140 ppb110 ppb
2005-09-070 ppb660 ppb
2005-09-020 ppb110 ppb
2005-08-300 ppb110 ppb
2005-08-250 ppb110 ppb
2005-08-180 ppb110 ppb
2005-08-100 ppb660 ppb
2005-08-030 ppb220 ppb
2005-08-020 ppb110 ppb
2005-07-270 ppb110 ppb
2005-07-210 ppb110 ppb
2005-07-190 ppb110 ppb
2005-07-150 ppb110 ppb
2005-07-130 ppb660 ppb
2005-07-070 ppb220 ppb
2005-07-060 ppb110 ppb
2005-06-300 ppb220 ppb
2005-06-220 ppb110 ppb
2005-06-210 ppb110 ppb
2005-06-170 ppb110 ppb
2005-06-150 ppb550 ppb
2005-06-060 ppb220 ppb
2005-05-250 ppb110 ppb
2005-05-180 ppb550 ppb
2005-05-160 ppb110 ppb
2005-05-090 ppb110 ppb
2005-05-060 ppb220 ppb
2005-04-260 ppb110 ppb
2005-04-150 ppb110 ppb
2005-04-110 ppb550 ppb
2005-04-060 ppb110 ppb
2005-03-171.6 ppb101.6 ppb
2005-03-150 ppb550 ppb
2005-03-023.05 ppb201.1 to 5 ppb
2005-03-010 ppb110 ppb
2005-02-160 ppb550 ppb
2005-02-090 ppb110 ppb
2005-02-020.31 ppb210 to 0.61 ppb
2005-01-140 ppb550 ppb
2005-01-050 ppb110 ppb
2005-01-040 ppb110 ppb
2004-12-160 ppb550 ppb
2004-12-060 ppb220 ppb
2004-11-160 ppb550 ppb
2004-11-040 ppb110 ppb
2004-11-020 ppb110 ppb
2004-10-140 ppb550 ppb
2004-10-130 ppb110 ppb
2004-10-050.55 ppb210 to 1.1 ppb
2004-09-130 ppb550 ppb
2004-09-020.42 ppb210 to 0.84 ppb
2004-08-110 ppb550 ppb
2004-08-040.48 ppb210 to 0.96 ppb
2004-07-140 ppb550 ppb
2004-07-080.67 ppb100.67 ppb
2004-07-070 ppb110 ppb
2004-06-160 ppb110 ppb
2004-06-100 ppb550 ppb
2004-06-090 ppb110 ppb
2004-06-040.37 ppb210 to 0.74 ppb
2004-05-250 ppb110 ppb
2004-05-210 ppb110 ppb
2004-05-170 ppb550 ppb
2004-05-120 ppb110 ppb
2004-05-070.41 ppb210 to 0.82 ppb
2004-04-270 ppb110 ppb
2004-04-260 ppb110 ppb
2004-04-190 ppb110 ppb
2004-04-160 ppb110 ppb
2004-04-120 ppb110 ppb
2004-04-070 ppb550 ppb
2004-04-050 ppb110 ppb
2004-04-010.44 ppb210 to 0.88 ppb
2004-03-160 ppb550 ppb
2004-03-100 ppb550 ppb
2004-03-033 ppb103 ppb
2004-03-010 ppb550 ppb
2004-02-230 ppb550 ppb
2004-02-190 ppb550 ppb
2004-02-110 ppb550 ppb
2004-02-032.8 ppb102.8 ppb
2004-02-020 ppb550 ppb
2004-01-270 ppb550 ppb
2004-01-200 ppb550 ppb
2004-01-130 ppb550 ppb
2004-01-080 ppb550 ppb
2004-01-050 ppb110 ppb