The Power of Information

National Drinking Water Database


City of Meza Utilities Department Utilities - Phoenix, AZ


Serves 350,000 people

Benzo[a]pyrene

Benzo[a]pyrene is a polycyclic aromatic hydrocarbon that contaminates drinking water from leaching coal tar coatings on water distribution pipes and storage liners; it is also a product of combustion.
 
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
32 days
Tests ConductedNumber of individual tests done for this contaminant
80 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Benzo[a]pyreneBenzo[a]pyrene is a polycyclic aromatic hydrocarbon that contaminates drinking water from leaching coal tar coatings on water distribution pipes and storage liners; it is also a product of combustion.0 ppb
0 ppb
No
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
0.2 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 Benzo[a]pyrene

Health Based Limits for Benzo[a]pyrene

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
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.<0.01 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
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.<0.01 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.0.2 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.0.5 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-12-040 ppb110 ppb
2007-11-140 ppb110 ppb
2007-08-220 ppb110 ppb
2007-08-200 ppb110 ppb
2007-05-220 ppb110 ppb
2007-05-100 ppb110 ppb
2007-02-270 ppb110 ppb
2007-02-260 ppb110 ppb
2006-12-120 ppb110 ppb
2006-11-070 ppb220 ppb
2006-09-280 ppb110 ppb
2006-09-190 ppb110 ppb
2006-07-190 ppb440 ppb
2006-07-180 ppb550 ppb
2006-07-170 ppb440 ppb
2006-07-120 ppb440 ppb
2006-07-110 ppb550 ppb
2006-07-100 ppb440 ppb
2006-05-230 ppb110 ppb
2006-01-230 ppb110 ppb
2006-01-170 ppb330 ppb
2006-01-110 ppb440 ppb
2006-01-100 ppb550 ppb
2006-01-090 ppb440 ppb
2006-01-050 ppb660 ppb
2006-01-040 ppb550 ppb
2006-01-030 ppb550 ppb
2005-05-230 ppb110 ppb
2005-01-240 ppb220 ppb
2004-11-170 ppb220 ppb
2004-09-200 ppb110 ppb
2004-03-030 ppb110 ppb