The Power of Information

National Drinking Water Database

City of Meza Utilities Department Utilities - Phoenix, AZ

Serves 350,000 people

Alpha particle activity (incl. radon & uranium)

Alpha particles are a form of radiation associated with mining waste pollutants and natural sources.
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
41 days
Tests ConductedNumber of individual tests done for this contaminant
167 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Alpha particle activity (incl. radon & uranium)Alpha particles are a form of radiation associated with mining waste pollutants and natural sources.1.29 pCi/L
5.7 pCi/L
15 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 Alpha particle activity (incl. radon & uranium)

Health Based Limits for Alpha particle activity (incl. radon & uranium)

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.15 pCi/L

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2007-12-040 pCi/L110 pCi/L
2007-11-140 pCi/L110 pCi/L
2007-08-220 pCi/L110 pCi/L
2007-08-200 pCi/L110 pCi/L
2007-05-220 pCi/L110 pCi/L
2007-05-100 pCi/L110 pCi/L
2007-04-050 pCi/L110 pCi/L
2007-02-270 pCi/L330 pCi/L
2007-02-260 pCi/L110 pCi/L
2006-11-160 pCi/L660 pCi/L
2006-11-090 pCi/L770 pCi/L
2006-11-070 pCi/L550 pCi/L
2006-11-060 pCi/L550 pCi/L
2006-10-110 pCi/L770 pCi/L
2006-09-280 pCi/L110 pCi/L
2006-09-190 pCi/L110 pCi/L
2006-07-190 pCi/L330 pCi/L
2006-07-180 pCi/L550 pCi/L
2006-07-170 pCi/L550 pCi/L
2006-07-120 pCi/L440 pCi/L
2006-07-110 pCi/L550 pCi/L
2006-07-100 pCi/L550 pCi/L
2006-06-154 pCi/L104 pCi/L
2006-05-232.82 pCi/L601.4 to 4.2 pCi/L
2006-05-172.81 pCi/L910 to 4.4 pCi/L
2006-05-162.92 pCi/L501.6 to 4.2 pCi/L
2006-05-153.57 pCi/L900.7 to 7.2 pCi/L
2006-04-040 pCi/L110 pCi/L
2006-01-250 pCi/L110 pCi/L
2006-01-231.4 pCi/L210 to 2.8 pCi/L
2006-01-171.71 pCi/L940 to 4.1 pCi/L
2006-01-112.01 pCi/L840 to 5.5 pCi/L
2006-01-103.46 pCi/L501.9 to 4.8 pCi/L
2006-01-091.36 pCi/L840 to 5.4 pCi/L
2006-01-052.92 pCi/L1040 to 7.5 pCi/L
2006-01-042.21 pCi/L830 to 6.7 pCi/L
2006-01-031.93 pCi/L950 to 6.3 pCi/L
2005-05-234.5 pCi/L104.5 pCi/L
2005-01-244.1 pCi/L203 to 5.2 pCi/L
2004-11-175.65 pCi/L203.8 to 7.5 pCi/L
2004-03-035.7 pCi/L105.7 pCi/L