The Power of Information

National Drinking Water Database


Sacramento Suburban Water District Utilities - Sacramento, CA


Serves 170,000 people

Arsenic (total)

Arsenic contaminates drinking water due to mining runoff, erosion of natural deposits, emissions from glass and electronics processing and the use of arsenical compounds as wood preservatives and pesticides.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
49 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
56 days
Tests ConductedNumber of individual tests done for this contaminant
484 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Arsenic (total)Arsenic contaminates drinking water due to mining runoff, erosion of natural deposits, emissions from glass and electronics processing and the use of arsenical compounds as wood preservatives and pesticides.1.82 ppb
7.4 ppb
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 ppb
No
10 ppb
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 Arsenic (total)

Health Based Limits for Arsenic (total)

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 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.<0.01 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.0.02 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.02 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.2 ppb
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.10 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.10 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-07-260 ppb110 ppb
2007-07-252.2 ppb102.2 ppb
2007-07-232 ppb1140 to 3.9 ppb
2007-06-250 ppb110 ppb
2007-06-211.18 ppb1260 to 2.8 ppb
2007-06-121.06 ppb530 to 2.9 ppb
2007-06-112.37 ppb1002 to 3.2 ppb
2007-04-160 ppb110 ppb
2007-04-120 ppb110 ppb
2006-12-077.4 ppb107.4 ppb
2006-11-161.6 ppb310 to 2.7 ppb
2006-09-084.3 ppb104.3 ppb
2006-08-141.85 ppb410 to 2.8 ppb
2006-07-110.8 ppb320 to 2.4 ppb
2006-06-272.24 ppb1520 to 5 ppb
2006-06-211.17 ppb1780 to 2.8 ppb
2006-06-200.57 ppb15120 to 3.8 ppb
2006-05-150 ppb110 ppb
2006-05-103 ppb310 to 6 ppb
2006-02-011.25 ppb430 to 5 ppb
2005-12-201 ppb1690 to 3 ppb
2005-12-192.3 ppb2320 to 3 ppb
2005-12-152.42 ppb1930 to 5 ppb
2005-12-145 ppb205 ppb
2005-12-132.09 ppb2340 to 3.1 ppb
2005-11-221.67 ppb310 to 3 ppb
2005-09-212 ppb1110 to 3 ppb
2005-09-202.45 ppb1110 to 3 ppb
2005-09-142.15 ppb2030 to 5 ppb
2005-09-080.8 ppb20140 to 3 ppb
2005-09-072.43 ppb2110 to 4 ppb
2005-08-112 ppb102 ppb
2005-06-283 ppb710 to 6 ppb
2005-06-270.57 ppb14100 to 2 ppb
2005-06-222.18 ppb1740 to 6 ppb
2005-06-212 ppb1830 to 3 ppb
2005-06-151.86 ppb1430 to 4 ppb
2005-06-141.5 ppb1240 to 3 ppb
2005-05-263.5 ppb202 to 5 ppb
2005-05-192 ppb102 ppb
2005-05-121.78 ppb920 to 3 ppb
2005-03-162 ppb102 ppb
2005-03-152.13 ppb1620 to 3 ppb
2005-03-102.07 ppb1420 to 3 ppb
2005-03-091 ppb1160 to 3 ppb
2005-03-081.83 ppb2350 to 3 ppb
2005-03-032.14 ppb1420 to 3 ppb
2004-08-312 ppb202 ppb
2004-07-060 ppb110 ppb
2004-06-244 ppb104 ppb
2004-06-141.2 ppb520 to 2 ppb
2004-06-070.4 ppb540 to 2 ppb
2004-06-013 ppb402 to 4 ppb
2004-05-241.2 ppb530 to 3 ppb
2004-05-170 ppb440 ppb
2004-05-101 ppb420 to 2 ppb