The Power of Information

National Drinking Water Database


Maryville Utilities - Conception, MO


Serves 9,872 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
1 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
47 days
Tests ConductedNumber of individual tests done for this contaminant
141 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.365.82 ppb
803.33 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
2009-06-12586.67 ppb30540 to 630 ppb
2009-05-12470 ppb30430 to 490 ppb
2009-04-13483.33 ppb30470 to 490 ppb
2009-03-17400 ppb30360 to 420 ppb
2009-02-12486.67 ppb30470 to 510 ppb
2009-01-14496.67 ppb30490 to 500 ppb
2008-12-10803.33 ppb30730 to 860 ppb
2008-11-12790 ppb30760 to 830 ppb
2008-10-16696.67 ppb30630 to 770 ppb
2008-09-15600 ppb30550 to 680 ppb
2008-08-13643.33 ppb30560 to 700 ppb
2008-07-14680 ppb30670 to 690 ppb
2008-06-16640 ppb30610 to 670 ppb
2008-05-07703.33 ppb30690 to 710 ppb
2008-04-15503.33 ppb30350 to 630 ppb
2008-03-12276.67 ppb30220 to 320 ppb
2008-02-13240 ppb30210 to 270 ppb
2008-01-16303.33 ppb30270 to 330 ppb
2007-12-11406.67 ppb30400 to 420 ppb
2007-11-13606.67 ppb30560 to 670 ppb
2007-10-16530 ppb30510 to 560 ppb
2007-09-12476.67 ppb30450 to 500 ppb
2007-08-15360 ppb30350 to 370 ppb
2007-07-18353.33 ppb30300 to 390 ppb
2007-06-11413.33 ppb30400 to 420 ppb
2007-05-14263.33 ppb30250 to 280 ppb
2007-04-16316.67 ppb30280 to 340 ppb
2007-03-14300 ppb30290 to 310 ppb
2007-02-12476.67 ppb30460 to 510 ppb
2007-01-15440 ppb30430 to 450 ppb
2006-12-11443.33 ppb30410 to 500 ppb
2006-11-09286.67 ppb3090 to 410 ppb
2006-10-09393.33 ppb30350 to 430 ppb
2006-09-18190 ppb30180 to 200 ppb
2006-08-14153.33 ppb3060 to 270 ppb
2006-07-24300 ppb30280 to 310 ppb
2006-06-20333.33 ppb30320 to 340 ppb
2006-05-1636.67 ppb3030 to 40 ppb
2006-04-1743.33 ppb3040 to 50 ppb
2006-03-0920 ppb3020 ppb
2006-02-2110 ppb310 to 20 ppb
2006-01-240 ppb330 ppb
2005-12-200 ppb330 ppb
2005-11-2826.67 ppb310 to 60 ppb
2005-10-25116.67 ppb30100 to 130 ppb
2005-09-2970 ppb3060 to 80 ppb
2005-08-2223.33 ppb3010 to 40 ppb