National Drinking Water Database
City of Riverside Public Utilities Utilities - Riverside, CA
Serves 280,832 people
BenzidineBenzidine is a manufactured chemical formerly used to produce dyes for cloth, paper, and leather.
Testing History-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
|BenzidineBenzidine is a manufactured chemical formerly used to produce dyes for cloth, paper, and leather.||0 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 Benzidine
Health Based Limits for Benzidine
|EPA Human Health Water Quality Criteria||Water 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|
|Health-Based Screening Level||A 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.||<0.01 ppb-0.02 ppb|
|Samples taken that day||Number of Non-Detects||Range of Results|
|2007-07-12||0 ppb||1||1||0 ppb|