The Power of Information

National Drinking Water Database


City of Modesto Utilities - Modesto, CA


Serves 190,106 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
11 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)
11 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
306 days
Tests ConductedNumber of individual tests done for this contaminant
795 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

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.7.5 pCi/L
34 pCi/L
YesYes
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)

StandardDescriptionLevel
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
2009-04-077.75 pCi/L201.5 to 14 pCi/L
2009-03-244.05 pCi/L201.4 to 6.7 pCi/L
2009-03-1014 pCi/L1014 pCi/L
2009-03-0314 pCi/L2011 to 17 pCi/L
2009-02-244.4 pCi/L201.4 to 7.4 pCi/L
2009-02-1024 pCi/L1024 pCi/L
2009-02-038.75 pCi/L203.5 to 14 pCi/L
2009-01-275.9 pCi/L204.4 to 7.4 pCi/L
2009-01-2013 pCi/L1013 pCi/L
2009-01-131.3 pCi/L101.3 pCi/L
2009-01-0611.8 pCi/L206.6 to 17 pCi/L
2008-12-235.1 pCi/L201.5 to 8.7 pCi/L
2008-12-098.7 pCi/L208 to 9.4 pCi/L
2008-12-0219 pCi/L1019 pCi/L
2008-11-253.17 pCi/L310 to 8 pCi/L
2008-11-180 pCi/L110 pCi/L
2008-11-1215.97 pCi/L301.9 to 25 pCi/L
2008-11-0516 pCi/L1016 pCi/L
2008-10-223 pCi/L201.7 to 4.3 pCi/L
2008-10-1513 pCi/L1013 pCi/L
2008-10-089.25 pCi/L208.8 to 9.7 pCi/L
2008-10-0124 pCi/L1024 pCi/L
2008-09-243.6 pCi/L201.8 to 5.4 pCi/L
2008-09-1010.21 pCi/L1110 to 19 pCi/L
2008-09-0323.5 pCi/L2018 to 29 pCi/L
2008-08-269.4 pCi/L109.4 pCi/L
2008-08-251.5 pCi/L101.5 pCi/L
2008-08-1234 pCi/L1034 pCi/L
2008-08-0514.7 pCi/L207.4 to 22 pCi/L
2008-07-2910 pCi/L1010 pCi/L
2008-07-281.2 pCi/L101.2 pCi/L
2008-07-0917 pCi/L1017 pCi/L
2008-07-0815.7 pCi/L207.4 to 24 pCi/L
2008-06-2412 pCi/L1012 pCi/L
2008-06-231.5 pCi/L101.5 pCi/L
2008-06-1222 pCi/L1022 pCi/L
2008-06-1115.8 pCi/L307.4 to 27 pCi/L
2008-06-1017.5 pCi/L6011 to 37 pCi/L
2008-06-0912 pCi/L1012 pCi/L
2008-06-047.4 pCi/L107.4 pCi/L
2008-06-0320 pCi/L1020 pCi/L
2008-05-275 pCi/L201.3 to 8.7 pCi/L
2008-05-231.9 pCi/L210 to 3.8 pCi/L
2008-05-221.8 pCi/L210 to 3.6 pCi/L
2008-05-211.75 pCi/L210 to 3.5 pCi/L
2008-05-201.7 pCi/L210 to 3.4 pCi/L
2008-05-191 pCi/L320 to 3 pCi/L
2008-05-181.6 pCi/L210 to 3.2 pCi/L
2008-05-171.75 pCi/L210 to 3.5 pCi/L
2008-05-161.35 pCi/L210 to 2.7 pCi/L
2008-05-151.6 pCi/L210 to 3.2 pCi/L
2008-05-141.75 pCi/L210 to 3.5 pCi/L
2008-05-139.53 pCi/L310 to 25 pCi/L
2008-05-121.8 pCi/L210 to 3.6 pCi/L
2008-05-111.6 pCi/L210 to 3.2 pCi/L
2008-05-101.8 pCi/L210 to 3.6 pCi/L
2008-05-091.9 pCi/L210 to 3.8 pCi/L
2008-05-081.7 pCi/L210 to 3.4 pCi/L
2008-05-072 pCi/L210 to 4 pCi/L
2008-05-067.73 pCi/L410 to 18 pCi/L
2008-05-053.03 pCi/L420 to 8 pCi/L
2008-05-042.25 pCi/L210 to 4.5 pCi/L
2008-05-032 pCi/L210 to 4 pCi/L
2008-05-022.15 pCi/L210 to 4.3 pCi/L
2008-05-012.15 pCi/L210 to 4.3 pCi/L
2008-04-302.4 pCi/L210 to 4.8 pCi/L
2008-04-294.97 pCi/L310 to 10 pCi/L
2008-04-281.93 pCi/L310 to 4.4 pCi/L
2008-04-271.9 pCi/L210 to 3.8 pCi/L
2008-04-262.1 pCi/L210 to 4.2 pCi/L
2008-04-252.1 pCi/L210 to 4.2 pCi/L
2008-04-242.2 pCi/L210 to 4.4 pCi/L
2008-04-232.3 pCi/L210 to 4.6 pCi/L
2008-04-1620 pCi/L1020 pCi/L
2008-04-1020 pCi/L1020 pCi/L
2008-04-0813.2 pCi/L207.4 to 19 pCi/L
2008-03-2511 pCi/L1011 pCi/L
2008-03-241.5 pCi/L101.5 pCi/L
2008-03-0412.85 pCi/L206.7 to 19 pCi/L
2008-02-267.4 pCi/L107.4 pCi/L
2008-02-251.1 pCi/L101.1 pCi/L
2008-02-190 pCi/L110 pCi/L
2008-02-138 pCi/L108 pCi/L
2008-02-1231 pCi/L1031 pCi/L
2008-02-0511.85 pCi/L206.7 to 17 pCi/L
2008-02-049.5 pCi/L210 to 19 pCi/L
2008-01-298.7 pCi/L108.7 pCi/L
2008-01-281.2 pCi/L101.2 pCi/L
2008-01-221.1 pCi/L101.1 pCi/L
2008-01-096.5 pCi/L106.5 pCi/L
2008-01-0711.5 pCi/L208 to 15 pCi/L
2007-12-2610 pCi/L1010 pCi/L
2007-12-241.3 pCi/L101.3 pCi/L
2007-12-1114.6 pCi/L303.4 to 33 pCi/L
2007-12-0414 pCi/L1014 pCi/L
2007-11-278 pCi/L108 pCi/L
2007-11-261.3 pCi/L101.3 pCi/L
2007-11-141.33 pCi/L320 to 4 pCi/L
2007-11-1313.6 pCi/L302.8 to 30 pCi/L
2007-11-122.3 pCi/L210 to 4.6 pCi/L
2007-11-092.4 pCi/L210 to 4.8 pCi/L
2007-11-071.5 pCi/L320 to 4.5 pCi/L
2007-11-0615 pCi/L1015 pCi/L
2007-11-050 pCi/L110 pCi/L
2007-10-238.7 pCi/L108.7 pCi/L
2007-10-221.2 pCi/L101.2 pCi/L
2007-10-107.4 pCi/L107.4 pCi/L
2007-10-098 pCi/L108 pCi/L
2007-10-0316 pCi/L1016 pCi/L
2007-10-0225 pCi/L1025 pCi/L
2007-10-016.7 pCi/L106.7 pCi/L
2007-09-255.6 pCi/L105.6 pCi/L
2007-09-241.1 pCi/L101.1 pCi/L
2007-09-1211 pCi/L1011 pCi/L
2007-09-119.4 pCi/L109.4 pCi/L
2007-09-0412.85 pCi/L206.7 to 19 pCi/L
2007-08-2811 pCi/L1011 pCi/L
2007-08-271.7 pCi/L101.7 pCi/L
2007-08-148.7 pCi/L108.7 pCi/L
2007-08-0823 pCi/L1023 pCi/L
2007-08-0729 pCi/L1029 pCi/L
2007-08-067.4 pCi/L107.4 pCi/L
2007-07-2411 pCi/L1011 pCi/L
2007-07-231.7 pCi/L101.7 pCi/L
2007-07-172 pCi/L102 pCi/L
2007-07-1113 pCi/L1013 pCi/L
2007-07-108 pCi/L108 pCi/L
2007-07-0327 pCi/L1027 pCi/L
2007-07-028 pCi/L108 pCi/L
2007-06-2610 pCi/L1010 pCi/L
2007-06-251.7 pCi/L101.7 pCi/L
2007-06-2010.2 pCi/L209.4 to 11 pCi/L
2007-06-1311.67 pCi/L3011 to 13 pCi/L
2007-06-1210.55 pCi/L206.1 to 15 pCi/L
2007-06-1111 pCi/L1011 pCi/L
2007-06-0614.85 pCi/L208.7 to 21 pCi/L
2007-06-056.6 pCi/L106.6 pCi/L
2007-05-223.7 pCi/L103.7 pCi/L
2007-05-153.6 pCi/L103.6 pCi/L
2007-05-141.7 pCi/L101.7 pCi/L
2007-05-0914 pCi/L1014 pCi/L
2007-05-081.3 pCi/L101.3 pCi/L
2007-05-076 pCi/L106 pCi/L
2007-04-241.9 pCi/L101.9 pCi/L
2007-04-231.6 pCi/L101.6 pCi/L
2007-04-170.75 pCi/L210 to 1.5 pCi/L
2007-04-1114 pCi/L1014 pCi/L
2007-04-101.9 pCi/L101.9 pCi/L
2007-04-0215 pCi/L1015 pCi/L
2007-03-2113 pCi/L1013 pCi/L
2007-03-077.87 pCi/L301.7 to 20 pCi/L
2007-02-218 pCi/L108 pCi/L
2007-02-148 pCi/L108 pCi/L
2007-02-071.7 pCi/L201.6 to 1.8 pCi/L
2007-02-0611 pCi/L1011 pCi/L
2007-01-170 pCi/L110 pCi/L
2007-01-081.7 pCi/L101.7 pCi/L
2007-01-031.9 pCi/L101.9 pCi/L
2007-01-0220 pCi/L1020 pCi/L
2006-12-198 pCi/L108 pCi/L
2006-12-070 pCi/L110 pCi/L
2006-12-068 pCi/L108 pCi/L
2006-12-0520 pCi/L2015 to 25 pCi/L
2006-11-0715.47 pCi/L309.4 to 25 pCi/L
2006-11-019.4 pCi/L109.4 pCi/L
2006-10-1811.52 pCi/L501.9 to 23 pCi/L
2006-10-0316.8 pCi/L206.6 to 27 pCi/L
2006-09-2711 pCi/L1011 pCi/L
2006-09-261.2 pCi/L101.2 pCi/L
2006-09-2017 pCi/L2011 to 23 pCi/L
2006-09-192.7 pCi/L102.7 pCi/L
2006-09-0610 pCi/L1010 pCi/L
2006-09-0515.7 pCi/L206.4 to 25 pCi/L
2006-08-308.7 pCi/L108.7 pCi/L
2006-08-236.4 pCi/L106.4 pCi/L
2006-08-226.1 pCi/L106.1 pCi/L
2006-08-1610.57 pCi/L306.7 to 17 pCi/L
2006-08-150 pCi/L110 pCi/L
2006-08-098.35 pCi/L206.7 to 10 pCi/L
2006-08-036.6 pCi/L106.6 pCi/L
2006-08-019.57 pCi/L306.3 to 15 pCi/L
2006-07-279.4 pCi/L205.8 to 13 pCi/L
2006-07-184.07 pCi/L310 to 11 pCi/L
2006-07-059.63 pCi/L306.2 to 16 pCi/L
2006-06-203.8 pCi/L103.8 pCi/L
2006-06-0727 pCi/L1027 pCi/L
2006-06-069.75 pCi/L206.5 to 13 pCi/L
2006-05-238 pCi/L108 pCi/L
2006-05-176.2 pCi/L106.2 pCi/L
2006-05-160 pCi/L110 pCi/L
2006-05-0812 pCi/L1012 pCi/L
2006-05-034.25 pCi/L203.4 to 5.1 pCi/L
2006-05-027.95 pCi/L205.9 to 10 pCi/L
2006-04-054.6 pCi/L104.6 pCi/L
2006-04-0416 pCi/L2010 to 22 pCi/L
2006-03-212.1 pCi/L102.1 pCi/L
2006-03-0718.5 pCi/L2014 to 23 pCi/L
2006-03-026.2 pCi/L106.2 pCi/L
2006-03-014.8 pCi/L104.8 pCi/L
2006-02-2815 pCi/L1015 pCi/L
2006-02-210 pCi/L110 pCi/L
2006-02-152.9 pCi/L102.9 pCi/L
2006-02-0811 pCi/L1011 pCi/L
2006-02-0719 pCi/L1019 pCi/L
2006-02-015.4 pCi/L303.5 to 7.4 pCi/L
2005-12-204 pCi/L104 pCi/L
2005-11-238.35 pCi/L208 to 8.7 pCi/L
2005-11-228.23 pCi/L602.7 to 25 pCi/L
2005-11-165.4 pCi/L105.4 pCi/L
2005-11-155.63 pCi/L402.7 to 11 pCi/L
2005-11-092.35 pCi/L210 to 4.7 pCi/L
2005-11-0810.57 pCi/L308.7 to 12 pCi/L
2005-11-021.35 pCi/L210 to 2.7 pCi/L
2005-11-017.67 pCi/L304 to 13 pCi/L
2005-10-263.4 pCi/L103.4 pCi/L
2005-10-255.5 pCi/L210 to 11 pCi/L
2005-10-192 pCi/L102 pCi/L
2005-10-189.6 pCi/L307.4 to 12 pCi/L
2005-10-125.14 pCi/L510 to 15 pCi/L
2005-10-115.63 pCi/L610 to 11 pCi/L
2005-10-0410.93 pCi/L404 to 19 pCi/L
2005-09-289.04 pCi/L510 to 18 pCi/L
2005-09-277.39 pCi/L710 to 23 pCi/L
2005-09-225 pCi/L105 pCi/L
2005-09-212.57 pCi/L310 to 4.9 pCi/L
2005-09-205.55 pCi/L203.1 to 8 pCi/L
2005-09-145.55 pCi/L410 to 15 pCi/L
2005-09-136.5 pCi/L210 to 13 pCi/L
2005-09-076.73 pCi/L310 to 14 pCi/L
2005-09-063.73 pCi/L310 to 7.4 pCi/L
2005-09-0114 pCi/L1014 pCi/L
2005-07-277.4 pCi/L203.8 to 11 pCi/L
2005-07-2612 pCi/L1012 pCi/L
2005-07-200 pCi/L110 pCi/L
2005-07-120 pCi/L110 pCi/L
2005-07-060 pCi/L110 pCi/L
2005-07-0511 pCi/L1011 pCi/L
2005-06-303.82 pCi/L520 to 12 pCi/L
2005-06-2914 pCi/L3012 to 15 pCi/L
2005-06-288.54 pCi/L1310 to 31 pCi/L
2005-06-223.33 pCi/L310 to 5.6 pCi/L
2005-06-216.44 pCi/L510 to 13 pCi/L
2005-06-155.5 pCi/L410 to 10 pCi/L
2005-06-144.53 pCi/L402.2 to 7.4 pCi/L
2005-06-134.3 pCi/L203.2 to 5.4 pCi/L
2005-06-080 pCi/L110 pCi/L
2005-06-079.51 pCi/L710 to 25 pCi/L
2005-05-250 pCi/L110 pCi/L
2005-05-243.2 pCi/L203.1 to 3.3 pCi/L
2005-05-173.73 pCi/L410 to 6.4 pCi/L
2005-05-112.15 pCi/L210 to 4.3 pCi/L
2005-05-1010.2 pCi/L207.4 to 13 pCi/L
2005-05-035.3 pCi/L105.3 pCi/L
2005-04-273.8 pCi/L103.8 pCi/L
2005-04-264.33 pCi/L303.4 to 5.7 pCi/L
2005-04-202.57 pCi/L310 to 5 pCi/L
2005-04-196.18 pCi/L510 to 15 pCi/L
2005-04-124.4 pCi/L104.4 pCi/L
2005-04-062.06 pCi/L860 to 11 pCi/L
2005-04-055.97 pCi/L304.2 to 8.7 pCi/L
2005-03-3017.4 pCi/L305.2 to 29 pCi/L
2005-03-246.03 pCi/L305.3 to 7.4 pCi/L
2005-03-172.91 pCi/L740 to 8 pCi/L
2005-03-104.95 pCi/L204.6 to 5.3 pCi/L
2005-03-034.6 pCi/L410 to 9.4 pCi/L
2005-02-245.11 pCi/L710 to 9.4 pCi/L
2005-02-172.55 pCi/L620 to 4.7 pCi/L
2005-02-103.6 pCi/L410 to 5.6 pCi/L
2005-02-035.03 pCi/L310 to 10 pCi/L
2005-01-272.78 pCi/L402.3 to 3.4 pCi/L
2005-01-204.13 pCi/L820 to 13 pCi/L
2005-01-134.29 pCi/L720 to 11 pCi/L
2005-01-066.08 pCi/L1750 to 20 pCi/L
2004-12-309.05 pCi/L205.1 to 13 pCi/L
2004-12-233.4 pCi/L410 to 6.2 pCi/L
2004-12-165.2 pCi/L105.2 pCi/L
2004-12-091.03 pCi/L320 to 3.1 pCi/L
2004-11-184 pCi/L203.9 to 4.09 pCi/L
2004-11-048.08 pCi/L1600.49 to 14.4 pCi/L
2004-10-215.54 pCi/L700.32 to 14.7 pCi/L
2004-10-144.9 pCi/L303.21 to 5.97 pCi/L
2004-10-078.91 pCi/L2600.89 to 18.8 pCi/L
2004-09-162.97 pCi/L500.73 to 5.1 pCi/L
2004-09-097.59 pCi/L306.99 to 8.5 pCi/L
2004-08-127.5 pCi/L1600.1 to 33.5 pCi/L
2004-08-0511.66 pCi/L1001.03 to 27.3 pCi/L
2004-07-2213.47 pCi/L401.69 to 27.8 pCi/L
2004-07-153.3 pCi/L900.44 to 7.54 pCi/L
2004-07-0811.87 pCi/L1201 to 31.4 pCi/L
2004-06-105.85 pCi/L201.2 to 10.5 pCi/L
2004-06-070.62 pCi/L100.62 pCi/L
2004-06-034.59 pCi/L201.36 to 7.81 pCi/L
2004-05-139.36 pCi/L803.3 to 23.5 pCi/L
2004-05-1111.9 pCi/L1011.9 pCi/L
2004-05-067.83 pCi/L1401.44 to 15.8 pCi/L
2004-04-292.79 pCi/L102.79 pCi/L
2004-04-158.98 pCi/L603.82 to 20.5 pCi/L
2004-04-088.36 pCi/L1300.57 to 19.4 pCi/L
2004-03-185.78 pCi/L105.78 pCi/L
2004-03-114.26 pCi/L104.26 pCi/L
2004-03-045.45 pCi/L105.45 pCi/L
2004-02-127.46 pCi/L1204.1 to 14.2 pCi/L
2004-02-054.84 pCi/L1401.19 to 12.3 pCi/L
2004-01-226.68 pCi/L800.01 to 24.3 pCi/L
2004-01-152.49 pCi/L500.28 to 4.68 pCi/L
2004-01-084.72 pCi/L702.17 to 9.81 pCi/L