The Power of Information

National Drinking Water Database

City of Grand Island Utilities - Grand Island, NE

Serves 40,036 people

Fonofos (dyfonate)

Fonofos is an insecticide used on corn, commercial and home lawns.
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
25 days
Tests ConductedNumber of individual tests done for this contaminant
40 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Fonofos (dyfonate)Fonofos is an insecticide used on corn, commercial and home lawns.0 ppb
0 ppb
10 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 Fonofos (dyfonate)

Health Based Limits for Fonofos (dyfonate)

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.10 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2008-06-170 ppb110 ppb
2008-05-190 ppb440 ppb
2008-02-040 ppb110 ppb
2007-04-230 ppb440 ppb
2007-01-080 ppb220 ppb
2006-07-240 ppb110 ppb
2006-04-240 ppb110 ppb
2006-04-170 ppb440 ppb
2006-01-170 ppb110 ppb
2006-01-050 ppb110 ppb
2006-01-030 ppb110 ppb
2005-12-290 ppb110 ppb
2005-10-030 ppb110 ppb
2005-08-080 ppb110 ppb
2005-04-250 ppb220 ppb
2005-04-180 ppb220 ppb
2005-04-050 ppb110 ppb
2005-02-220 ppb110 ppb
2005-01-100 ppb110 ppb
2004-10-040 ppb110 ppb
2004-07-060 ppb110 ppb
2004-04-190 ppb440 ppb
2004-04-050 ppb110 ppb
2004-01-270 ppb110 ppb
2004-01-120 ppb110 ppb