EWG Tap Water Database 2009

	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	1 days
Tests ConductedNumber of individual tests done for this contaminant	1 tests

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

1 days

Tests ConductedNumber of individual tests done for this contaminant

1 tests

Contaminant	Average/ Maximum Result	Health Limit Exceeded	Legal Limit Exceeded	Testing History -Tested -Detected -Over Health Guidelines -Over Legal Limit*
DichlorvosDichlorvos is a highly volatile, acutely toxic organophosphate pesticide used as fumigant in residential areas, crops, and in the milling and grain handling industries; used to treat parasitic worm infections; ingredient in flea-control pet collars.	0 ppb 0 ppb	No 0.4 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.

Contaminant

Average/
Maximum
Result

Health Limit
Exceeded

Legal Limit
Exceeded

Testing History

-Tested

-Detected

-Over Health Guidelines

-Over Legal Limit*

DichlorvosDichlorvos is a highly volatile, acutely toxic organophosphate pesticide used as fumigant in residential areas, crops, and in the milling and grain handling industries; used to treat parasitic worm infections; ingredient in flea-control pet collars.

0 ppb
0 ppb

No
0.4 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.

Standard

Description

Level

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.

0.4 ppb

Testing Date

Average
Result

Samples taken that day

Number of Non-Detects

Range of Results

2007-07-10

0 ppb

National Drinking Water Database

City of Riverside Public Utilities Utilities - Riverside, CA

Dichlorvos

Testing Summary

Testing History

Health Based and Legal Limits for Dichlorvos

Health Based Limits for Dichlorvos

Testing Results

Health/Toxics

Farming

Natural Resources

Energy Choices