The Power of Information

National Drinking Water Database


Story City Water Dept Utilities - Ames, IA


Serves 3,228 people

Lead (total)

Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
44 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
74 days
Tests ConductedNumber of individual tests done for this contaminant
219 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Lead (total)Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.8.76 ppb
50.59 ppb
Yes
MCLGA 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.: 0 ppb
No
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 Lead (total)

Health Based Limits for Lead (total)

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.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.2 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2009-05-010 ppb110 ppb
2009-04-307.6 ppb1060 to 35 ppb
2009-04-294 ppb940 to 9 ppb
2008-12-194.5 ppb210 to 9 ppb
2008-12-184.71 ppb750 to 18 ppb
2008-12-170 ppb220 ppb
2008-12-168.56 ppb950 to 31 ppb
2008-05-130 ppb220 ppb
2008-05-097.76 ppb420 to 18.33 ppb
2008-05-080 ppb110 ppb
2008-05-079.79 ppb310 to 15.53 ppb
2008-05-062.87 ppb1080 to 18.17 ppb
2007-12-113.42 ppb210 to 6.83 ppb
2007-12-0714.99 ppb1014.99 ppb
2007-12-060 ppb220 ppb
2007-12-050 ppb110 ppb
2007-12-030 ppb110 ppb
2007-12-010 ppb220 ppb
2007-11-306.75 ppb1160 to 17.97 ppb
2007-05-1124.04 ppb1024.04 ppb
2007-05-100 ppb110 ppb
2007-05-0915.85 ppb310 to 28.92 ppb
2007-05-063.62 ppb210 to 7.23 ppb
2007-05-050 ppb550 ppb
2007-05-047.43 ppb750 to 36.92 ppb
2007-05-0317 ppb1017 ppb
2006-12-0617.27 ppb1017.27 ppb
2006-12-060 pCi/L*110 ppb
2006-12-050 pCi/L*110 ppb
2006-12-040 pCi/L*110 ppb
2006-12-0450.59 ppb1050.59 ppb
2006-12-020 pCi/L*110 ppb
2006-12-010 pCi/L*110 ppb
2006-11-3027.74 ppb1027.74 ppb
2006-11-290 pCi/L*330 ppb
2006-11-2935.79 ppb2019.78 to 51.79 ppb
2006-11-280 pCi/L*440 ppb
2006-11-288.53 ppb208.49 to 8.56 ppb
2006-11-276.69 ppb106.69 ppb
2006-06-0514.3 ppb1014.3 ppb
2006-06-020 pCi/L*220 ppb
2006-06-0223.7 ppb1023.7 ppb
2006-06-010 pCi/L*110 ppb
2006-05-3027.9 ppb1027.9 ppb
2006-05-2619 ppb2017.1 to 20.9 ppb
2006-05-250 pCi/L*110 ppb
2006-05-240 pCi/L*220 ppb
2006-05-230 pCi/L*660 ppb
2006-05-2336.5 ppb1036.5 ppb
2006-05-220 pCi/L*220 ppb
2005-11-100 ppb110 ppb
2005-11-040 ppb110 ppb
2005-11-0328.05 ppb210 to 56.1 ppb
2005-11-025.77 ppb640 to 23.8 ppb
2005-11-0115.13 ppb820 to 36.1 ppb
2005-10-318.6 ppb108.6 ppb
2005-03-310 ppb110 ppb
2005-03-2935.3 ppb1035.3 ppb
2005-03-249.87 ppb310 to 23.8 ppb
2005-03-233.13 ppb740 to 11.4 ppb
2005-03-227.78 ppb840 to 29.8 ppb
2004-11-0912.9 ppb1012.9 ppb
2004-11-070 ppb110 ppb
2004-11-056 ppb205.3 to 6.7 ppb
2004-11-0418.7 ppb210 to 37.4 ppb
2004-11-035.86 ppb750 to 32.6 ppb
2004-11-029.98 ppb430 to 39.9 ppb
2004-11-010 ppb330 ppb
2004-05-107.1 ppb107.1 ppb
2004-05-070 ppb110 ppb
2004-05-0648 ppb2032.3 to 63.7 ppb
2004-05-0510.9 ppb530 to 28.8 ppb
2004-05-044.41 ppb860 to 30.2 ppb
2004-05-030 ppb330 ppb