The Power of Information

National Drinking Water Database

Townsend Water Department Utilities - Wilmington, DE

Serves 1,500 people


delta-BHC (benzene hexachloride) is an insecticide formerly used on fruit, vegetable and forest crops.
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
6 days
Tests ConductedNumber of individual tests done for this contaminant
13 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
delta-BHCdelta-BHC (benzene hexachloride) is an insecticide formerly used on fruit, vegetable and forest crops.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 delta-BHC

Health Based Limits for delta-BHC

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
2007-06-130 ppb220 ppb
2006-01-250 ppb440 ppb
2006-01-150 ppb110 ppb
2005-01-180 ppb220 ppb
2004-12-160 ppb220 ppb
2004-01-160 ppb220 ppb