The Power of Information

National Drinking Water Database


Paducah Water Works Utilities - Paducah, KY


Serves 47,000 people

Chlorite

Chlorite is a disinfection byproduct resulting from water treatment with chlorine dioxide, or from the use of chlorine dioxide as a bleaching agent for cellulose, paper pulp, flour and oils.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
6 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
101 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
ChloriteChlorite is a disinfection byproduct resulting from water treatment with chlorine dioxide, or from the use of chlorine dioxide as a bleaching agent for cellulose, paper pulp, flour and oils.626.41 ppb
909.5 ppb
Yes
800 ppb
No
1000 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 Chlorite

Health Based Limits for Chlorite

StandardDescriptionLevel
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.800 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.800 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.840 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.840 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.1000 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.1000 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-01-05884.75 ppb40820 to 934 ppb
2008-12-01656.25 ppb40588 to 742 ppb
2008-11-03890.75 ppb40847 to 937 ppb
2008-10-06735.75 ppb40608 to 851 ppb
2008-09-08909.5 ppb40786 to 1109 ppb
2008-08-15809.75 ppb40736 to 888 ppb
2008-08-11770.5 ppb40602 to 848 ppb
2008-07-08651.5 ppb40608 to 741 ppb
2008-06-14825 ppb40620 to 980 ppb
2008-06-09337.5 ppb40309 to 371 ppb
2008-05-27577 ppb40503 to 604 ppb
2008-03-0320 ppb4020 ppb
2008-02-11181.25 ppb4078 to 229 ppb
2008-01-07614.25 ppb40563 to 668 ppb
2007-12-03633.25 ppb40560 to 712 ppb
2007-11-05528.5 ppb40468 to 574 ppb
2007-10-08642.75 ppb40592 to 678 ppb
2007-09-10668.5 ppb40612 to 724 ppb
2007-07-09571.5 ppb40453 to 692 ppb
2007-06-04531.75 ppb40459 to 590 ppb
2007-05-07621.6 ppb50599 to 688 ppb
2007-04-09860.33 ppb30756 to 914 ppb
2007-03-05650.8 ppb50520 to 796 ppb
2007-02-21497.5 ppb40380 to 560 ppb
2007-01-23590 ppb40500 to 684 ppb