The Power of Information

National Drinking Water Database

South Tahoe Pud - Main Utilities - South Lake Tahoe, CA

Serves 60,000 people

Combined Uranium (pCi/L)

Uranium 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
40 days
Tests ConductedNumber of individual tests done for this contaminant
150 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Combined Uranium (pCi/L)Uranium is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.3.99 pCi/L
14.62 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 Combined Uranium (pCi/L)

Health Based Limits for Combined Uranium (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
Samples taken that dayNumber of Non-DetectsRange of Results
2009-01-153.4 pCi/L103.4 pCi/L
2008-10-165.79 pCi/L105.79 pCi/L
2008-08-205.07 pCi/L300.85 to 11.57 pCi/L
2008-07-233.48 pCi/L600.7 to 7.27 pCi/L
2008-06-172.88 pCi/L1400.69 to 7.22 pCi/L
2008-03-260.96 pCi/L100.96 pCi/L
2007-12-020.87 pCi/L100.87 pCi/L
2007-09-180.24 pCi/L100.24 pCi/L
2007-08-226.9 pCi/L200.54 to 13.26 pCi/L
2007-07-253.29 pCi/L701.18 to 8.27 pCi/L
2007-06-264.3 pCi/L700.98 to 11.6 pCi/L
2006-06-301.42 pCi/L101.42 pCi/L
2006-05-246.5 pCi/L210 to 13 pCi/L
2006-04-254.51 pCi/L820 to 12 pCi/L
2006-04-136.18 pCi/L502.7 to 11.16 pCi/L
2006-03-273 pCi/L1450 to 9.5 pCi/L
2006-02-087.5 pCi/L210 to 15 pCi/L
2006-01-112.28 pCi/L500.43 to 3.68 pCi/L
2006-01-103.56 pCi/L520 to 11 pCi/L
2006-01-0514.62 pCi/L209.4 to 19.84 pCi/L
2005-12-143.22 pCi/L1030 to 9.4 pCi/L
2005-12-082.7 pCi/L210 to 5.39 pCi/L
2005-11-176.01 pCi/L420 to 17 pCi/L
2005-10-134.23 pCi/L610 to 9.48 pCi/L
2005-09-292.59 pCi/L102.59 pCi/L
2005-09-210 pCi/L110 pCi/L
2005-09-205.81 pCi/L400.47 to 9.91 pCi/L
2005-08-245.74 pCi/L201.57 to 9.9 pCi/L
2005-07-205.26 pCi/L610 to 9.45 pCi/L
2005-06-213.21 pCi/L620 to 7.98 pCi/L
2005-04-133.85 pCi/L103.85 pCi/L
2005-01-172.72 pCi/L102.72 pCi/L
2004-10-051.76 pCi/L101.76 pCi/L
2004-09-300.44 pCi/L100.44 pCi/L
2004-09-030.88 pCi/L100.88 pCi/L
2004-08-3110.35 pCi/L200.74 to 19.95 pCi/L
2004-07-280.92 pCi/L100.92 pCi/L
2004-07-274.96 pCi/L610 to 12.97 pCi/L
2004-06-163.72 pCi/L510 to 8.51 pCi/L
2004-03-174.57 pCi/L104.57 pCi/L