The Power of Information

National Drinking Water Database


Artesian Water Company Utilities - Wilmington, DE


Serves 201,000 people

Propachlor

Propachlor is a carcinogenic herbicide that had been historically used on corn and sorghum.
 
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
85 days
Tests ConductedNumber of individual tests done for this contaminant
314 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
PropachlorPropachlor is a carcinogenic herbicide that had been historically used on corn and sorghum.<0.01 ppb
0.18 ppb
No
1 ppb
Legal 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 Propachlor

Health Based Limits for Propachlor

StandardDescriptionLevel
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.1 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.1 ppb-100 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.100 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.500 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.500 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.2000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-11-130 ppb110 ppb
2007-11-010 ppb110 ppb
2007-10-040 ppb110 ppb
2007-08-300 ppb110 ppb
2007-08-150 ppb110 ppb
2007-08-070 ppb110 ppb
2007-08-020 ppb220 ppb
2007-07-250 ppb110 ppb
2007-06-130 ppb110 ppb
2007-05-230 ppb660 ppb
2007-05-040 ppb110 ppb
2007-04-300 ppb330 ppb
2007-04-250 ppb440 ppb
2007-04-050 ppb110 ppb
2007-02-220 ppb330 ppb
2007-02-210 ppb550 ppb
2007-02-130 ppb110 ppb
2007-02-060 ppb110 ppb
2007-01-100 ppb110 ppb
2007-01-090 ppb110 ppb
2007-01-030 ppb110 ppb
2006-01-300 ppb330 ppb
2006-01-280 ppb110 ppb
2006-01-260 ppb220 ppb
2006-01-250 ppb11110 ppb
2006-01-240 ppb220 ppb
2006-01-230 ppb550 ppb
2006-01-220 ppb220 ppb
2006-01-210 ppb330 ppb
2006-01-180 ppb660 ppb
2006-01-140 ppb440 ppb
2006-01-130 ppb220 ppb
2006-01-120 ppb20200 ppb
2006-01-110 ppb110 ppb
2006-01-080 ppb330 ppb
2006-01-070 ppb550 ppb
2006-01-060 ppb330 ppb
2006-01-050 ppb14140 ppb
2006-01-030 ppb110 ppb
2006-01-010 ppb110 ppb
2005-01-310 ppb110 ppb
2005-01-280 ppb880 ppb
2005-01-270 ppb440 ppb
2005-01-250 ppb12120 ppb
2005-01-230.18 ppb640 to 1 ppb
2005-01-220 ppb330 ppb
2005-01-180 ppb110 ppb
2005-01-170 ppb880 ppb
2005-01-160 ppb440 ppb
2005-01-150 ppb20200 ppb
2005-01-140 ppb220 ppb
2005-01-130 ppb440 ppb
2005-01-120 ppb220 ppb
2005-01-080 ppb110 ppb
2005-01-030 ppb220 ppb
2004-12-090 ppb220 ppb
2004-10-260 ppb110 ppb
2004-07-150 ppb220 ppb
2004-06-150 ppb440 ppb
2004-05-200 ppb440 ppb
2004-05-130 ppb110 ppb
2004-04-290 ppb220 ppb
2004-04-270 ppb220 ppb
2004-04-150 ppb220 ppb
2004-03-300 ppb220 ppb
2004-03-240 ppb440 ppb
2004-03-180 ppb440 ppb
2004-02-250 ppb440 ppb
2004-02-190 ppb220 ppb
2004-02-030 ppb220 ppb
2004-01-300 ppb220 ppb
2004-01-290 ppb220 ppb
2004-01-280 ppb880 ppb
2004-01-270 ppb220 ppb
2004-01-260 ppb330 ppb
2004-01-250 ppb440 ppb
2004-01-240 ppb440 ppb
2004-01-200 ppb12120 ppb
2004-01-190 ppb440 ppb
2004-01-180 ppb440 ppb
2004-01-150 ppb880 ppb
2004-01-130 ppb110 ppb
2004-01-090 ppb660 ppb
2004-01-050 ppb110 ppb
2004-01-030 ppb10100 ppb