The Power of Information

National Drinking Water Database

Town of Gilbert Utilities - Phoenix, AZ

Serves 100,000 people


Uranium-238 is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.
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
31 days
Tests ConductedNumber of individual tests done for this contaminant
49 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Uranium-238Uranium-238 is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.0 pCi/L
0 pCi/L
0.03 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 Uranium-238

Health Based Limits for Uranium-238

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.0.03 pCi/L

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2007-10-310 mg/L*110 pCi/L
2007-10-230 pCi/L220 pCi/L
2007-10-220 pCi/L330 pCi/L
2007-10-180 pCi/L220 pCi/L
2007-10-180 mg/L*110 pCi/L
2007-10-160 pCi/L110 pCi/L
2007-07-090 pCi/L110 pCi/L
2007-07-050 mg/L*220 pCi/L
2007-07-050 pCi/L330 pCi/L
2007-07-020 pCi/L440 pCi/L
2007-06-180 mg/L*110 pCi/L
2007-05-300 mg/L*110 pCi/L
2007-05-240 pCi/L110 pCi/L
2007-05-090 pCi/L220 pCi/L
2007-05-030 mg/L*110 pCi/L
2007-05-010 pCi/L440 pCi/L
2007-05-010 mg/L*110 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 mg/L*110 pCi/L
2007-01-220 pCi/L220 pCi/L
2007-01-220 mg/L*110 pCi/L
2007-01-170 pCi/L110 pCi/L
2007-01-160 pCi/L220 pCi/L
2005-01-120 mg/L*220 pCi/L
2005-01-110 mg/L*110 pCi/L
2005-01-100 mg/L*110 pCi/L
2004-10-110 mg/L*110 pCi/L
2004-07-070 mg/L*110 pCi/L
2004-07-060 mg/L*220 pCi/L