The Power of Information

National Drinking Water Database

Pomona - City, Water Dept. Utilities - Los Angeles, CA

Serves 156,500 people


Nitrobenzene is a synthetic chemical used in the production of aniline, which is used to make dyes, herbicides and drugs.
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
27 days
Tests ConductedNumber of individual tests done for this contaminant
87 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
NitrobenzeneNitrobenzene is a synthetic chemical used in the production of aniline, which is used to make dyes, herbicides and drugs.0 ppb
0 ppb
4 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 Nitrobenzene

Health Based Limits for Nitrobenzene

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.4 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.17 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-01-210 ppb330 ppb
2009-01-140 ppb220 ppb
2009-01-070 ppb550 ppb
2008-07-020 ppb770 ppb
2008-05-280 ppb220 ppb
2008-02-130 ppb110 ppb
2008-01-230 ppb330 ppb
2008-01-160 ppb110 ppb
2008-01-140 ppb220 ppb
2008-01-090 ppb220 ppb
2008-01-070 ppb550 ppb
2008-01-020 ppb880 ppb
2007-04-110 ppb110 ppb
2007-01-240 ppb110 ppb
2007-01-220 ppb220 ppb
2007-01-100 ppb660 ppb
2007-01-030 ppb990 ppb
2006-10-250 ppb110 ppb
2006-10-180 ppb220 ppb
2006-10-110 ppb110 ppb
2006-07-190 ppb330 ppb
2006-07-120 ppb220 ppb
2006-07-050 ppb990 ppb
2006-02-220 ppb220 ppb
2006-02-070 ppb110 ppb
2006-02-010 ppb220 ppb
2006-01-110 ppb440 ppb