The Power of Information

National Drinking Water Database


Winterset Municipal Waterworks Utilities - Winterset, IA


Serves 4,768 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
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
40 days
Tests ConductedNumber of individual tests done for this contaminant
120 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.114.96 ppb
586.67 ppb
No
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
2009-06-080 ppb330 ppb
2009-03-090 ppb330 ppb
2008-12-080 ppb330 ppb
2008-09-090 ppb330 ppb
2008-06-0370 ppb320 to 210 ppb
2008-03-040 ppb330 ppb
2007-12-04100 ppb310 to 160 ppb
2007-09-050 ppb660 ppb
2007-06-0533.33 ppb320 to 100 ppb
2007-03-0680 ppb620 to 120 ppb
2006-12-04115 ppb20100 to 130 ppb
2006-12-040 pCi/L*110 ppb
2006-09-050 pCi/L*110 ppb
2006-09-05100 ppb20100 ppb
2006-06-050 pCi/L*330 ppb
2006-03-06233.33 ppb30220 to 260 ppb
2005-12-12173.33 ppb30150 to 190 ppb
2005-11-14143.33 ppb310 to 220 ppb
2005-10-11100 ppb310 to 170 ppb
2005-09-130 ppb330 ppb
2005-08-150 ppb330 ppb
2005-07-110 ppb330 ppb
2005-06-1333.33 ppb320 to 100 ppb
2005-05-2383.33 ppb310 to 140 ppb
2005-04-12226.67 ppb30220 to 230 ppb
2005-03-14323.33 ppb30270 to 350 ppb
2005-02-14220 ppb30180 to 240 ppb
2005-01-10216.67 ppb30200 to 230 ppb
2004-12-06186.67 ppb30130 to 220 ppb
2004-11-0840 ppb320 to 120 ppb
2004-10-110 ppb330 ppb
2004-09-070 ppb330 ppb
2004-08-030 ppb330 ppb
2004-07-070 ppb330 ppb
2004-06-080 ppb330 ppb
2004-05-11100 ppb320 to 300 ppb
2004-04-12586.67 ppb30570 to 610 ppb
2004-03-01413.33 ppb30300 to 480 ppb
2004-02-11473.33 ppb30350 to 580 ppb
2004-01-28546.67 ppb30540 to 550 ppb