2018 Consumer Confidence Report

We test the drinking water quality for many constituents as required by state and federal regulations. This report shows the results of our monitoring for the period of January 1 - December 31, 2017 and may include earlier monitoring data.
May, 2019

Terms Used In This Report

Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water.  Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible.  Secondary MCLs are set to protect the odor, taste, and appearance of drinking water.
Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency (U.S. EPA).
Public Health Goal (PHG): The level of a contaminant in drinking water below which there is no known or expected risk to health.  PHGs are set by the California Environmental Protection Agency. Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
Primary Drinking Water Standards (PDWS): MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.
Secondary Drinking Water Standards (SDWS): MCLs for contaminants that affect taste, odor, or appearance of the drinking water.  Contaminants with SDWSs do not affect the health at the MCL levels.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.
Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
Variances and Exemptions: Permissions from the State Water Resources Control Board (State Board) to exceed an MCL or not comply with a treatment technique under certain conditions.
Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.
Level 2 Assessment: A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.
ND: not detectable at testing limit
ppm: parts per million or milligrams per liter (mg/L)
ppb: parts per billion or micrograms per liter (µg/L)
ppt: parts per trillion or nanograms per liter (ng/L)
ppq: parts per quadrillion or picogram per liter (pg/L)
pCi/L: picocuries per liter (a measure of radiation)

In 2018 Myoma Dunes Water customers have conserved a total of 226,400,000 gallons of water compared to gallons used in 2013. That is an average of over 92,000 gallons per household. CONGRATULATIONS!!!

For more than 65 years, Myoma Dunes Water Company has been vigilant in looking for ways to improve how we can provide the highest quality water at an affordable rate.

Our team works hard to fulfill this mission, and exceeding all state and federal water quality standards year after year is no exception.This year, we are once again proud to report that your tap water met all EPA and state drinking water health standards, and our system has not violated any maximum contaminant level.
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include:
  • Microbial contaminants, such as viruses and bacteria, that may come from sewage treatmentplants, septic systems, agricultural livestock operations, and wildlife.
  • Inorganic contaminants, such as salts and metals, that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.
  • Pesticides and herbicides, that may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
  • Organic chemical contaminants, including synthetic and volatile organic chemicals, that arebyproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural application, and septic systems.
  • Radioactive contaminants, that can be naturally-occurring or be the result of oil and gas production and mining activities.

Additional General Information on Drinking Water

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline (1-800-426-4791).

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, peoplewith HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. U.S. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-800-426-4791).

Your water comes from five Company-owned wells located in the Bermuda Dunes area. They draw water from the Lower Whitewater River sub-basin of the Coachella Valley aquifer. To protect our water from possible intrusion of contaminants, a Drinking Water Source Assessment was completed on April 9, 2003.The assessment examined all known sites of possible contaminating activities -such as septic tanks, sewer systems and golf courses -which might affect our source water. Our monitoring of the source water indicates that water quality is not currently influenced by those activities.


MDWC wishes to thank all of its customers for your interest in the services we provide. For more information, please call (760)772-1967

In order to ensure that tap water is safe to drink, the U.S. EPA and the State Board prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The U.S. Food and Drug Administration regulations and California law also establishlimits for contaminants in bottled water that provide the same protection for public health.

Este informe contiene información muy importante sobre su agua para beber. Favor de comunicarse Myoma Dunes Water Company a 79050 Avenue 42, Bermuda Dunes CA (760)772-1967 para asistirlo en español

Tables 1, 2, 3, 4, 5, and 6 list all of the drinking water contaminants that were detected during the most recent sampling for the constituent..
The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. The State Boardallows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do notchange frequently. Some of the data, though representative of the water quality, are more than one-year-old.Any violation of an AL, MCL, MRDL, or TT is asterisked. Additional information regarding the violation is provided later in this report.
Table 1 – SAMPLING RESULTS SHOWING the detection of coliform bacteria
Microbiological Contaminants No. of Detections No. of Months in Violation MCL MCLG Typical Source of Bacteria
Fecal Coliform or E. coli (state Total Coliform Rule) 0 0 0 0 Human and animal fecal waste
Table 2 – SAMPLING RESULTS SHOWING THE detection of Lead and copper
Lead and Copper Sample Date No. of samples collected 90th percentile level detected No. sites exceeding AL AL PHG No. of Schools Requesting Lead Sampling Typical Source of Contaminant
Lead (ppb) 9/19/2018 26 ND 0 15 0.2 1 Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (ppm) 9/19/2018 26 .096 0 1.3 0.3 Not applicable Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives
Table 3 – SAMPLING RESULTS FOR sodium and hardness
Chemical or Constituent Sample Date Level Detected Range of Detections MCL PHG (MCLG) Typical Source of Contaminant
Sodium (ppm) 11/14/16
24.4 23-26 none none Salt present in the water and is generally naturally occurring
Hardness (ppm) 11/13/17
109.4 97-110 none none Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring
Table 4 – detection of contaminants with a Primary Drinking Water Standard
Chemical or Constituent Sample Date Level Detected Range of Detections MCL
Typical Source of Contaminant
Nitrate (As NO3) 11/13/17
.65 mg/L .53-.90 mg/L 10 ppm n/a Erosion of natural deposits; Runoff and leeching from fertilizer use; leeching from septic tanks and sewage.
Gross Alpha 10/02/17
6.72 pCi/L 3.78-10.1 pCi/L 15 pCi/L n/a Erosion of natural deposit.
Uranium 10/02/17
4.38 pCi/L 3.25-6.28 pci/L 20 pCi/L n/a Erosion of natural deposit.
Table 5 – detection of contaminants with a Secondary Drinking Water Standard
Chemical or Constituent

Sample Date Level Detected Range of Detections MCL PHG
Typical Source of Contaminant
Bicarbonate Alkalinity 11/13/17
122 mg/L 110-130 mg/L None n/a Naturally-occurring organic materials.
Calcium 11/13/17
32 mg/L 29-38 mg/L None n/a Naturally-occurring organic materials.
Chloride 11/14/16
10.02 mg/L 8.3-12 mg/L 500 mg/L n/a Runoff/leaching from natural deposits; seawater influence.
Fluoride 11/14/16
.67 mg/L .55-.7 mg/L 2 mg/L .1 mg/L Erosion of natural deposits; water additive that promotes healthy teeth; discharge from fertilizer and aluminum.
Magnesium 11/13/17
6.9 mg/L 5.7-7.9 mg/L None n/a Naturally-occurring organic materials.
pH. Laboratory 11/13/17
8.2 mg/L 8.2-8.2 mg/L None n/a Naturally-occurring organic materials.
Specific Conductance 11/14/16
334 uS/cm 300-390 uS/cm 2200 uS/cm 1600 uS/cm Substances that form ions when in water; seawater influence.
Sulfate 11/14/16
23.6 mg/L 19-30 mg/L 500 500 mg/L Runoff/leaching from natural deposits; Industrial wastes.
Total Dissolved Solids 11/13/17
182 mg/L 140-220 mg/L 1000 n/a Runoff/leaching from natural deposits.
Chromium (Total) 11/13/17
13.6 ug/L 11-15 ug/L 50 ug/L (100) ug/L Erosion of natural deposits; Discharge from steel and pulp mills and chrome plating.
What is Hexavalent Chromium and why isthere a public health concern?Chromium is a heavy metal that occurs throughout the environment. The Trivalent Form is a required nutrient and has very low toxicity. The hexavalent form, also commonly known as Chromium-6, is more toxic and has been known to cause cancer when inhaled.
Chemical or Constituent Sample Date Level Detected Range of Detections PHG Health Effects
Hexavalent Chromium (Chromium-6) 08/14/2017
13.2 ppb 11-15 ppb 0.02 ppb1 Some people who drink water containing hexavalent chromium in excess of the MCL over many years may have an increased risk of getting cancer.
1 There is currently no MCL for hexavalent chromium. The previous MCL of 0.010 mg/L was withdrawn on September 11, 2017.

Where does Hexavalent Chromiumcome from? Much of the low level Hexavalent Chromiumfound in drinking water is naturally occurring, reflecting its presence in geological formations throughout the state. However, there are areas of contamination in California from historic industrial use, suchas the manufacturing of textile dyes, wood preservation, leather tanning, and anti-corrosion coatings, where Hexavalent Chromiumcontaminated waste has migrated into the underlying groundwater.

For more information about water qualityplease contact the office at 79-050 42ndAve, Bermuda Dunes, CA 92203• phone (760)772-1967 • fax (760)772-0955 • email address info@myomawater.com