The Power of Information

National Drinking Water Database


City of Fresno Water Division Utilities - Fresno, CA


Serves 390,350 people

Alpha particle activity

Alpha particles are a form of radiation released from mining waste pollutants and natural sources.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
63 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)
1 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
72 days
Tests ConductedNumber of individual tests done for this contaminant
715 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Alpha particle activityAlpha particles are a form of radiation released from mining waste pollutants and natural sources.2.89 pCi/L
18.25 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
Yes
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

Health Based Limits for Alpha particle activity

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
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
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2008-11-210 pCi/L110 pCi/L
2008-07-176.5 pCi/L106.5 pCi/L
2008-01-1514.1 pCi/L1014.1 pCi/L
2008-01-143.1 pCi/L650 to 18.6 pCi/L
2008-01-0418.25 pCi/L2016.8 to 19.7 pCi/L
2007-10-3111 pCi/L1011 pCi/L
2007-08-300 pCi/L110 pCi/L
2007-08-285.14 pCi/L105.14 pCi/L
2007-06-260 pCi/L440 pCi/L
2007-06-131.45 pCi/L15110 to 6.93 pCi/L
2007-06-126.31 pCi/L1130 to 19.4 pCi/L
2007-06-065.07 pCi/L810 to 8.25 pCi/L
2007-06-053.23 pCi/L203 to 3.46 pCi/L
2007-06-042.17 pCi/L1170 to 14 pCi/L
2007-06-011.77 pCi/L18140 to 20.6 pCi/L
2007-05-310.94 pCi/L14130 to 13.2 pCi/L
2007-05-302.08 pCi/L950 to 7.62 pCi/L
2007-05-290 pCi/L10100 pCi/L
2007-05-253 pCi/L20110 to 15.8 pCi/L
2007-05-244.12 pCi/L1780 to 17.1 pCi/L
2007-05-233.48 pCi/L950 to 10.3 pCi/L
2007-05-224.23 pCi/L1890 to 22.9 pCi/L
2007-04-200 pCi/L110 pCi/L
2007-04-190 pCi/L110 pCi/L
2007-03-291.05 pCi/L720 to 3.98 pCi/L
2007-03-213.05 pCi/L730 to 7.97 pCi/L
2007-03-164.56 pCi/L20100 to 17.8 pCi/L
2007-03-153.19 pCi/L1470 to 15.7 pCi/L
2007-03-130 pCi/L110 pCi/L
2007-03-121.83 pCi/L18130 to 15.4 pCi/L
2007-03-081.98 pCi/L16100 to 9.12 pCi/L
2007-03-063.56 pCi/L20100 to 13.9 pCi/L
2006-12-200 pCi/L220 pCi/L
2006-12-191.34 pCi/L540 to 6.7 pCi/L
2006-12-182.62 pCi/L1790 to 13.8 pCi/L
2006-12-152.71 pCi/L19120 to 17.7 pCi/L
2006-12-141.56 pCi/L16110 to 7.02 pCi/L
2006-12-132.11 pCi/L16110 to 13.9 pCi/L
2006-12-120.69 pCi/L18160 to 6.7 pCi/L
2006-12-110.24 pCi/L17160 to 4.02 pCi/L
2006-12-081.13 pCi/L25210 to 14.7 pCi/L
2006-12-070.45 pCi/L870 to 3.61 pCi/L
2006-12-063.3 pCi/L1370 to 14.2 pCi/L
2006-12-055.97 pCi/L920 to 15.1 pCi/L
2006-12-041.89 pCi/L14100 to 12.1 pCi/L
2006-10-170.88 pCi/L19150 to 5.55 pCi/L
2006-09-284.36 pCi/L1880 to 16.8 pCi/L
2006-09-272.13 pCi/L29200 to 11.3 pCi/L
2006-09-262.96 pCi/L29190 to 23.5 pCi/L
2006-09-256.27 pCi/L1970 to 22 pCi/L
2006-09-222.25 pCi/L18130 to 15.1 pCi/L
2006-09-214.88 pCi/L2090 to 25.3 pCi/L
2006-09-204.72 pCi/L25110 to 21.4 pCi/L
2006-09-190 pCi/L10100 pCi/L
2006-09-182.59 pCi/L1070 to 17.2 pCi/L
2006-09-151.04 pCi/L1080 to 7.32 pCi/L
2006-09-140.77 pCi/L1080 to 4.51 pCi/L
2006-09-132.86 pCi/L1060 to 16.6 pCi/L
2006-09-121.55 pCi/L640 to 5.16 pCi/L
2006-07-250.91 pCi/L100.91 pCi/L
2006-07-121.1 pCi/L300.77 to 1.35 pCi/L
2006-06-072.16 pCi/L201.89 to 2.43 pCi/L
2006-05-020.7 pCi/L100.7 pCi/L
2006-01-034.07 pCi/L104.07 pCi/L
2005-09-135.65 pCi/L105.65 pCi/L
2005-08-256.5 pCi/L106.5 pCi/L
2005-07-270.22 pCi/L100.22 pCi/L
2005-03-161.45 pCi/L101.45 pCi/L
2004-09-240.87 pCi/L100.87 pCi/L
2004-09-220.95 pCi/L200.58 to 1.32 pCi/L
2004-05-182.38 pCi/L102.38 pCi/L
2004-04-204.59 pCi/L200.67 to 8.51 pCi/L