The Power of Information

National Drinking Water Database

City of Daly City Utilities - San Mateo, CA

Serves 92,311 people


trans-1,3-Dichloropropene is used in chemical synthesis, in agriculture as a soil fumigant and nematocide, and as a corrosion inhibition agent.
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
20 days
Tests ConductedNumber of individual tests done for this contaminant
35 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
trans-1,3-Dichloropropenetrans-1,3-Dichloropropene is used in chemical synthesis, in agriculture as a soil fumigant and nematocide, and as a corrosion inhibition agent.0 ppb
0 ppb
NoLegal 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 trans-1,3-Dichloropropene

Health Based Limits for trans-1,3-Dichloropropene

There are no health based standards that EWG is using for this chemical

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2007-07-180 ppb110 ppb
2007-05-300 ppb660 ppb
2006-06-290 ppb330 ppb
2006-06-280 ppb220 ppb
2006-06-010 ppb220 ppb
2006-05-240 ppb330 ppb
2006-05-030 ppb110 ppb
2006-04-200 ppb110 ppb
2006-04-100 ppb110 ppb
2006-04-040 ppb110 ppb
2006-02-230 ppb110 ppb
2005-11-100 ppb550 ppb
2005-11-020 ppb110 ppb
2005-10-180 ppb110 ppb
2005-07-190 ppb110 ppb
2005-07-050 ppb110 ppb
2005-06-290 ppb110 ppb
2005-06-210 ppb110 ppb
2005-06-140 ppb110 ppb
2005-05-060 ppb110 ppb