The Power of Information

National Drinking Water Database


City of Peoria Utilities - Phoenix, AZ


Serves 86,000 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
38 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)
2 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
109 days
Tests ConductedNumber of individual tests done for this contaminant
198 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.1.87 ppb
12 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
Yes
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
2007-12-270 ppb220 ppb
2007-12-260 ppb110 ppb
2007-12-190 ppb440 ppb
2007-11-150 ppb110 ppb
2007-11-060 ppb110 ppb
2007-10-250 ppb110 ppb
2007-10-180 ppb440 ppb
2007-10-160 ppb770 ppb
2007-10-150 ppb440 ppb
2007-10-100 ppb220 ppb
2007-10-090 ppb110 ppb
2007-10-080 ppb220 ppb
2007-10-040 ppb220 ppb
2007-10-030 ppb220 ppb
2007-10-020 ppb330 ppb
2007-09-260 ppb110 ppb
2007-09-250 ppb220 ppb
2007-09-240 ppb110 ppb
2007-09-120 ppb220 ppb
2007-09-110 ppb110 ppb
2007-08-240 ppb550 ppb
2007-08-230 ppb220 ppb
2007-07-300 ppb110 ppb
2007-07-230 ppb220 ppb
2007-07-190 ppb330 ppb
2007-07-180 ppb220 ppb
2007-07-160 ppb220 ppb
2007-07-100 ppb550 ppb
2007-07-090 ppb330 ppb
2007-07-020 ppb110 ppb
2007-06-280 ppb110 ppb
2007-06-270 ppb110 ppb
2007-06-140 ppb110 ppb
2007-06-060 ppb220 ppb
2007-05-090 ppb110 ppb
2007-04-240 ppb110 ppb
2007-04-190 ppb220 ppb
2007-04-180 ppb110 ppb
2007-04-170 ppb330 ppb
2007-04-160 ppb110 ppb
2007-04-050 ppb440 ppb
2007-04-040 ppb220 ppb
2007-04-030 ppb550 ppb
2007-03-280 ppb110 ppb
2007-03-270 ppb220 ppb
2007-03-260 ppb110 ppb
2007-03-200 ppb110 ppb
2007-03-140 ppb110 ppb
2007-03-050 ppb110 ppb
2007-03-010 ppb110 ppb
2007-02-280 ppb110 ppb
2007-02-270 ppb110 ppb
2007-02-260 ppb110 ppb
2007-01-310 ppb110 ppb
2007-01-110 ppb110 ppb
2007-01-100 ppb330 ppb
2007-01-090 ppb220 ppb
2007-01-080 ppb220 ppb
2007-01-040 ppb110 ppb
2007-01-030 ppb110 ppb
2006-12-060 ppb110 ppb
2006-10-050 ppb110 ppb
2006-10-040 ppb220 ppb
2006-10-030 ppb110 ppb
2006-09-220 ppb110 ppb
2006-09-210 ppb110 ppb
2006-07-190 ppb110 ppb
2006-07-175 ppb105 ppb
2006-07-133.5 ppb203 to 4 ppb
2006-05-267 ppb107 ppb
2006-03-219 ppb109 ppb
2006-02-060 ppb110 ppb
2006-01-193 ppb103 ppb
2006-01-189 ppb109 ppb
2006-01-174.4 ppb502 to 9 ppb
2006-01-137 ppb107 ppb
2006-01-118 ppb208 ppb
2005-03-296 ppb106 ppb
2005-03-011.8 ppb101.8 ppb
2005-01-065 ppb204 to 6 ppb
2004-12-013 ppb103 ppb
2004-10-214 ppb104 ppb
2004-10-136 ppb106 ppb
2004-10-075.75 ppb403 to 8 ppb
2004-09-173 ppb103 ppb
2004-09-150 ppb110 ppb
2004-08-303 ppb103 ppb
2004-08-117 ppb304 to 9 ppb
2004-08-102 ppb102 ppb
2004-07-233 ppb103 ppb
2004-07-224 ppb104 ppb
2004-07-160 ppb110 ppb
2004-07-133 ppb103 ppb
2004-07-093.5 ppb203 to 4 ppb
2004-07-077 ppb504 to 11 ppb
2004-07-017 ppb107 ppb
2004-06-2912 ppb209 to 15 ppb
2004-06-013.3 ppb103.3 ppb
2004-05-053 ppb103 ppb
2004-04-2911 ppb1011 ppb
2004-02-136.67 ppb304 to 8 ppb
2004-02-126.5 ppb605 to 9 ppb
2004-02-058 ppb108 ppb
2004-01-285 ppb302 to 9 ppb
2004-01-270 ppb110 ppb
2004-01-237 ppb203 to 11 ppb
2004-01-216 ppb304 to 9 ppb
2004-01-163 ppb103 ppb
2004-01-122 ppb210 to 4 ppb