The Power of Information

National Drinking Water Database


Diamond Park Mutual Water Co. - Anaheim, CA


Serves 200 people - Test data available: 2004-2009

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the California Department of Public Health. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources to protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes test results for this utility and lists potential health concerns.

 
This Drinking Water System
National Average
Exceed Health GuidelinesTests showing chemicals at concentrations above health guidelines established by federal and state health agencies. These guidelines are typically set at a levels that pose no significant health risk.
2 chemicals
4
Health Standard ExceedencesChemicals detected at concentrations above the legal limit, the Maximum Contaminant Level (MCLs) established by the U.S. EPA. 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.
2 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
10 chemicals
8
Tests ConductedThe total number of number of water quality tests conducted by water utilities and recorded in data provided by the state water agency.
641 tests
420

Contaminants Exceeding Health Guidelines

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.8.41 ppm
11.3 ppm
Yes
10 ppm
Yes
10 ppm
NitrateNitrate enters drinking water sources from fertilizer runoff, leaching septic tanks, and erosion of natural deposits; it is also emitted by chemical, petrochemical and metal-finishing industries.8.4 ppm
11.27 ppm
Yes
10 ppm
Yes
10 ppm
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.

Other Detected Contaminants

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
BromideBromide is a naturally occurring element found in surface waters and groundwater and contributes to the formation of toxic tap water disinfection byproducts.460 ppb
470 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Barium (total)Barium is a mineral that enters drinking water through drilling and mining waste runoff, discharges from chemical industries and erosion of natural deposits.122 ppb
131 ppb
No
700 ppb
No
2000 ppb
Selenium (total)Selenium is a naturally occurring element that contaminates water due to mining or petrolum refining, fly-ash from coal-burning power plants, and irrigation of arid farmland soils high in selenium.24.35 ppb
29.6 ppb
No
50 ppb
No
50 ppb
VanadiumVanadium is a metal used as an alloying addition to iron & steel; it is discharged from ceramic, glass, textile, photography, metallurgy and rubber industries.3.3 ppb
3.5 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
NitriteNitrite is a chemical that enters water from fertilizer runoff, leaching septic tanks, and erosion of natural deposits.<0.01 ppm
<0.01 ppm
No
1 ppm
No
1 ppm
AluminumAluminum is a metal released from metal refineries and mining operations.4.5 ppb
9 ppb
No
200 ppb
No
200 ppb
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.0.5 ppb
1 ppb
No
100 ppb
No
100 ppb
Chromium (hexavalent)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.2.3 ppb
2.3 ppb
NoNo
100 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.

Contaminants Not Detected - 100 chemicals

1,1,1,2-Tetrachloroethane, 1,1,1-Trichloroethane, 1,1,2,2-Tetrachloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethane, 1,1-Dichloroethylene, 1,1-Dichloropropene, 1,2 Dibromo-3-chloropropane (DBCP), 1,2,3-Trichlorobenzene, 1,2,3-Trichloropropane, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 1,3-Dichloropropene, 2,2-Dichloropropane, Alachlor (Lasso), Antimony (total), Arsenic (total), Atrazine, Benzene, Beryllium (total), bis(2-chloroethyl) ether, Bromacil, Bromobenzene, Bromochloromethane, Bromodichloromethane, Bromoform, Bromomethane, Butachlor, Cadmium (total), Carbon tetrachloride, Chloroethane, Chloroform, Chloromethane, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Copper, Cyanide, Diazinon (Spectracide), Dibromochloromethane, Dibromomethane, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dimethoate, Ethyl-t-butyl ether (ETBE), Ethylbenzene, Ethylene dibromide (EDB), Hexachlorobutadiene, Isopropylbenzene, Lead (total), m- & p- Xylene, m-Dichlorobenzene, Malathion, Manganese, Mercury (total inorganic), Methyl ethyl ketone, Methyl isobutyl ketone, Methyl Parathion, Metolachlor, Metribuzin, Molinate (Ordram), Monochlorobenzene (Chlorobenzene), Mtbe, n-Butylbenzene, n-Propylbenzene, Naphthalene, Nitrobenzene, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, Parathion (ethyl), Perchlorate, Prometon, Prometryn, Propachlor, sec-Butylbenzene, Silver (total), Simazine, Styrene, Tert-Amyl-Methyl Ether, Tert-Butyl Alcohol, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), Thiobencarb (Bolero), Toluene, Total trihalomethanes (TTHMs), trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroethylene, Trichlorofluoromethane, Trichlorotrifluoroethane, Vinyl chloride, Xylenes (total)

Pollution Summary

10Total Contaminants Detected (2004 - 2009)

Aluminum, Bromide, Barium (total), Chromium (total), Nitrite, Selenium (total), Chromium (hexavalent), Vanadium, Nitrate & nitrite, Nitrate

4Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrite, Selenium (total), Nitrate & nitrite, Nitrate

3Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Nitrite, Nitrate & nitrite, Nitrate

10Industrial Pollutants

Aluminum, Bromide, Barium (total), Chromium (total), Nitrite, Selenium (total), Chromium (hexavalent), Vanadium, Nitrate & nitrite, Nitrate

0Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

9Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Aluminum, Bromide, Barium (total), Chromium (total), Nitrite, Selenium (total), Chromium (hexavalent), Nitrate & nitrite, Nitrate

2Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Bromide, Vanadium

EPA Violation Summary

Violation CategoryNumber of Violations
Monitoring
(click see violations)
1

Information on violations is drawn directly from EPA's national violations database in the Agency's Safe Drinking Water Information System. Analyses by others have raised questions about the quality of the information in EPA's database. For the purposes of this investigation, EWG is not showing below or including in our analyses, those violations for individual water suppliers that occurred on days for which the total number of violations assigned by EPA to that water supplier was greater than 20. This criteria was based on common characteristics of incorrect violations data as identified by water utilities, from a review of EPA's violations data by several hundred utilities prior to the release of EWG's investigation.