The Power of Information

National Drinking Water Database


Town of Gilbert Utilities - Phoenix, AZ


Serves 100,000 people

Radium-226

Radium-226 is a radioactive element usually found around uranium deposits.
 
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
22 days
Tests ConductedNumber of individual tests done for this contaminant
42 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.<0.01 pCi/L
0.08 pCi/L
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 pCi/L
No
5 pCi/L
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 Radium-226

Health Based Limits for Radium-226

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 pCi/L
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.0.05 pCi/L
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.5 pCi/L
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.5 pCi/L

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-10-310 pCi/L110 pCi/L
2007-10-230 pCi/L220 pCi/L
2007-10-220 pCi/L330 pCi/L
2007-10-180 pCi/L330 pCi/L
2007-10-160 pCi/L110 pCi/L
2007-07-090 pCi/L110 pCi/L
2007-07-050 pCi/L550 pCi/L
2007-07-020 pCi/L440 pCi/L
2007-06-180 pCi/L110 pCi/L
2007-05-300 pCi/L110 pCi/L
2007-05-240 pCi/L110 pCi/L
2007-05-090 pCi/L220 pCi/L
2007-05-030 pCi/L110 pCi/L
2007-05-010 pCi/L550 pCi/L
2007-02-260 pCi/L110 pCi/L
2007-01-300 pCi/L110 pCi/L
2007-01-290 pCi/L110 pCi/L
2007-01-240 pCi/L110 pCi/L
2007-01-220 pCi/L330 pCi/L
2007-01-170 pCi/L110 pCi/L
2007-01-160 pCi/L220 pCi/L
2005-05-170.08 mg/L*100.08 pCi/L