The Power of Information

National Drinking Water Database


San Antonio Water System Utilities - San Antonio, TX


Serves 1,219,113 people

Acrylonitrile

Acrylonitrile is a chemical intermediate used in the manufacture of plastics, synthetic rubber, antioxidants, pharmaceuticals and dyes.
 
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
21 days
Tests ConductedNumber of individual tests done for this contaminant
68 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
AcrylonitrileAcrylonitrile is a chemical intermediate used in the manufacture of plastics, synthetic rubber, antioxidants, pharmaceuticals and dyes.0 ppb
0 ppb
No
0.05 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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 Acrylonitrile

Health Based Limits for Acrylonitrile

StandardDescriptionLevel
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.0.05 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.0.06 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.0.06 ppb-6 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.6 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-05-140 ppb330 ppb
2007-02-150 ppb110 ppb
2006-09-190 ppb220 ppb
2006-05-030 ppb110 ppb
2006-05-020 ppb110 ppb
2006-05-010 ppb220 ppb
2006-03-070 ppb110 ppb
2006-03-060 ppb110 ppb
2005-09-230 ppb110 ppb
2005-06-210 ppb660 ppb
2005-06-200 ppb660 ppb
2005-05-110 ppb660 ppb
2005-05-100 ppb550 ppb
2005-05-090 ppb660 ppb
2004-11-080 ppb110 ppb
2004-11-040 ppb660 ppb
2004-11-030 ppb220 ppb
2004-06-150 ppb220 ppb
2004-03-040 ppb220 ppb
2004-02-040 ppb330 ppb
2004-02-030 ppb10100 ppb