System: Doe Bay Water Users Association
State ID: #19600C
County: San Juan County
A printable version of this report is also available.
About Your Water Quality
The Doe Bay Water Users Association is committed to providing its customers with excellent water quality at all times and is proud of its past service record. The Association now partners with Washington Water Service and its courteous and knowledgeable water professionals to continually strive to improve upon the quality of water service we provide to you, our valued customers.
This 2020 Drinking Water Report is your annual update on the quality and safety of your drinking water. It includes the most recent water quality results through the monitoring period ending December 31, 2020, in accordance with state and federal regulations (not all testing is required every year). This report also provides access through references and telephone numbers to source water assessments, health effects information, and other water system topics. This allows you to make personal health-based decisions regarding your drinking water consumption and become more involved in decisions which may affect your health.
Most importantly, this report shows that your drinking water source meets all primary and secondary EPA and Department of Health standards.
We hope you find this information helpful.
Your Water System
Where does my water come from?
Your water comes from Mountain Lake in Moran State Park. This is a surface water source.
The water flows from the lake to a treatment plant where it passes through slow-sand filters to remove physical and biological contaminants. The filtered water is then treated with chlorine for disinfection purposes.
This treated water flows by gravity to two primary storage tanks which serve the majority of the homes and businesses on the water system, and to a third storage tank in the Cow Hill service zone where it is booster pumped to provide increased service pressure for those customers.
If you have any questions, suggestions, or concerns, please contact our Customer Service Center, either by phone at (877) 408-4060 or contact us online.
Source Water Protection Information.
Drinking water comes from groundwater (wells and springs) and surface water (rivers, lakes, streams). Protecting these drinking water sources is key to sustaining safe drinking water supplies for this and future generations.
What you can do to protect source water:
- Ensure that your septic system is properly maintained.
- Use chemical fertilizers and pesticides sparingly, if at all.
- Don't dump any hazardous waste on the ground. This includes: motor oil, pesticides, paint or paint cans, mothballs, flea collars, household cleaners, medicines, etc.
Check the SWAP information for your water system:
The Washington State Department of Health Office of Drinking Water has compiled Source Water Assessment Program (SWAP) data for all community water systems in Washington. A source water assessment includes:
- A delineation (definition) of the source water protection area,
- An inventory of potential sources of contamination, and
- A susceptibility determination (how susceptible the source is to contamination).
An interactive map with data for your water system is available at: fortress.wa.gov/doh/swap/
To ensure that the high-quality water we deliver is not compromised in the distribution system, Washington Water has a robust cross-connection control program in place. Cross-connection control is critical to ensuring that activities on customers' properties do not affect the public water supply. Our cross-connection control specialists ensure that all of the existing backflow prevention assemblies are tested annually, assess all connections, and enforce and manage the installation of new commercial and residential assemblies.
Backflow can occur when certain pressure conditions exist either in our distribution system or within the customer's plumbing, so our customers are our first line of defense. A minor home improvement project — without the proper protections — can create a potentially hazardous situation, so careful adherence to plumbing codes and standards will ensure the community's water supply remains safe. Please be sure to utilize the advice or services of a qualified plumbing professional.
Many water-use activities involve substances that, if allowed to enter the distribution system, would be aesthetically displeasing or could even present health concerns. Some common cross-connections are:
- Garden hoses connected to a hose bib without a simple hose-type vacuum breaker (available at a home improvement store)
- Improperly installed toilet tank fill valves that do not have the required air gap between the valve or refill tube
- Landscape irrigation systems that do not have the proper backflow prevention assembly installed on the supply line
The list of materials that could potentially contaminate the water system is vast. According to the EPA, a wide variety of substances have contaminated drinking water systems throughout the country as a result of poor cross-connection control. Examples include:
- Antifreeze from a heating system
- Lawn chemicals from a garden hose or sprinkler head
- Blue water from a toilet tank
- Carbonated water from a soda dispenser
Customers must ensure that all plumbing is in conformance with local plumbing codes. Additionally, state law requires certain types of facilities to install and maintain backflow prevention assemblies at the water meter. Washington Water's cross-connection control staff will determine whether you need to install a backflow prevention assembly based on water uses at your location.
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 EPA's Safe Drinking Water Hotline at (800) 426-4791.
Common sources of drinking water — both tap and bottled water — include rivers, lakes, streams, ponds, and reservoirs (surface water), and wells and springs (groundwater). As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material. Water can also 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, parasites, and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
Inorganic contaminants, such as salts and metals, which 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, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.
Organic chemical contaminants, including synthetic and volatile organic chemicals, which are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems.
In order to ensure that tap water is safe to drink, the Washington State Department of Health (DOH) and EPA prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) and Washington State Department of Agriculture regulations establish limits for contaminants in bottled water that must provide the same protection for public health.
Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised people such as those with cancer undergoing chemotherapy, those who have undergone organ transplants, people with 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. EPA/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 at (800) 426-4791.
Action level (AL): The concentration of a contaminant which, when exceeded, triggers treatment or other requirements which a water system must follow.
Lead and Copper 90th Percentile Value: Out of every 10 homes sampled, 9 were at or below this level. This must be less than or equal to the AL or additional steps must be taken.
Maximum containment level (MCL): The highest level of a contaminant allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
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 allow for a margin of safety.
µmhos/cm: A measure of specific conductance.
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.
N/A: Not applicable.
Not detected (ND): The result is less than the SDRL.
Nephelometric turbidity unit (ntu): A measure of water clarity.
ppb: Parts per billion (µg/L, micrograms per liter)
ppm: Parts per million (mg/L, milligrams per liter)
State detection reporting limit (SDRL): The minimum reportable detection of an analyte as established by DOH. If the test result is less than the SDRL, the contaminant is considered to be not detected.
Secondary maximum contaminant level (SMCL): These standards are developed as guidelines to protect the aesthetic qualities of drinking water and are not health based.
Treatment technique (TT): A required process intended to reduce the level of a contaminant in drinking water.
2020 Water Quality
Your water is tested for more than 150 contaminants for which state and federal standards have been set.
Tables 1 & 2 list all primary contaminants that were detected at or above the state detection reporting limit (SDRL), along with their respective MCLs. Primary MCLs (primary standards) protect public health by limiting the levels of these contaminants in drinking water.
Table 3 lists secondary contaminants of interest to many consumers, as well as any unregulated contaminant detections. Secondary contaminants have no known health effects but can affect the aesthetic properties of water (taste, odor, and appearance). Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to help EPA determine their occurrence in drinking water and potential need for future regulation.
The source codes indicate major sources of contaminants in drinking water.
- AM: Water additive used to control microbes
- BD: Byproduct of drinking water disinfection
- CH: Corrosion of household plumbing systems
- EN: Erosion of natural deposits
- LN: Leaching from natural deposits
- LX: Leaching from septic tanks
- NAT: Substances that form natural deposits
- NOM: Naturally occurring organic materials
- RF: Runoff from fertilizer use
- RLN: Runoff/leaching from natural deposits
- RS: Soil runoff
- SEA: Seawater influence
- SEW: Sewage
- WI: Industrial wastes
Table 1: Primary Contaminants
|Inorganic Chemicals||Year Tested||Units||MCL||MCLG||Your Water||Violation?||Source|
|Nitrate||2020||ppm||10||10||ND||No||EN, LX, RF, SEW|
|Disinfectant (an additive)||Year Tested||Units||MRDL||MRDLG||Highest Running Average||Range||Violation?||Source|
|Free Chlorine Residual||2020||ppm||4||4||0.95||0.15–2.8||No||AM|
|Disinfection Byproducts||Year Tested||Units||MCL||MCLG||Your Water||Violation?||Source|
|Total Trihalomethanes (TTHM)||2020||ppb||80||N/A||55||No||BD|
|Haloacetic Acids (HAA5)||2020||ppb||60||N/A||18||No||BD|
|Inorganic Chemicals||Year Tested||Units||MCL||MCLG||Highest Single Measurement||Lowest Monthly Percentage||Violation?||Source|
|Turbidity (surface water requiring filtration)1||2020||NTU||TT||N/A||0.24||100%||No||RS|
Table 2: Lead and Copper
|Samples are collected at customer kitchen or bathroom taps. Residences considered to be at highest risk for corrosion are selected for sampling (i.e., those with lead and copper in internal plumbing, based on specific EPA tiering criteria and available home construction details from county web sites). The number of homes sampled is based on population served by the water system. This testing is done every three years.|
|Primary Contaminants||Year Tested||Units||AL||90th Percentile||Samples > AL||Violation?||Source|
|Copper||2019||ppm||1.3||0.10||0 of 5||No||CH, EN|
|Lead||2019||ppb||15||10||1 of 5||No||CH, EN|
Table 3: Secondary and Unregulated Contaminants
|Secondary Contaminants||Year Tested2||Units||SMCL||Your Water||Violation?||Source|
|Unregulated Contaminants||Year Tested||Units||SMCL||Your Water||Violation?||Source|
1 For surface water systems, the treatment technique (TT) dictates that the filtered water turbidity be less than or equal to 1.0 NTU in at least 95% of the measurements taken each month. Also, the maximum turbidity allowed for any single measurement is 5.0 NTU. Turbidity is a measure of the cloudiness of the water. We continuously monitor it because it is a good indicator of the effectiveness of our filtration system. Elevated turbidity may indicate the presence of disease-causing organisms (bacteria, viruses and parasites). Turbidity can also interfere with disinfection and provide a medium for microbial growth.
2 Most recent testing done, in accordance with the regulations. Your drinking water source was granted a 9-year monitoring waiver for most inorganic chemicals (IOC) by the DOH, based on water quality history. With a waiver, one IOC sample (28 inorganic tests) is required every 9 years, rather than every 3 years. DOH uses the monitoring waivers allowed by EPA because they save systems money without compromising public health. Nitrate is never waived (tested annually, see Table 1). Complete inorganics testing is due next in 2023.
3 The EPA recommends 20 ppm sodium as a level of concern for consumers who must restrict their dietary intake.
4 When reading the hardness value, 0–75 ppm is considered “soft" water, 75–150 ppm is “moderately hard," 150–300 ppm is “hard," and > 300 ppm is “very hard". To convert to grains per gallon of hardness, divide total hardness by 17.1.
5 The state's drinking water response level is 1.0 NTU, meaning additional sampling or steps may be required, if needed. Please see additional detail about turbidity in Table 1.
6 Lead and copper are regulated at customer taps (see Table 2 for those results), not at the source, which is what these results represent. This is because lead and copper in drinking water do not typically come from the water source. They come from the plumbing that serves, or is inside, the customer's home, from corrosion of lead and copper-containing plumbing or fixtures, or the lead solder that connects copper pipes.
In Washington state, lead in drinking water comes primarily from materials and components used in household plumbing. If present, elevated levels of lead can cause serious health problems, especially in pregnant women and young children.
When a drinking water tap has not been used for six hours or more, you can minimize the potential for lead exposure by flushing the tap until the water is noticeably colder (30 seconds to two minutes) before using the water for drinking or cooking. Hot water is likely to contain higher levels of lead. Only use water from the cold-water tap for drinking, cooking, and making baby formula.
If you are concerned about lead in your water, you may wish to have your home's water tested.
Information on lead in drinking water is available from EPA's Safe Drinking Water Hotline at (800) 426-4791, or online at www.epa.gov/safewater/lead.
About Monitoring Waivers (reduced monitoring)
Drinking water sources are sampled and tested a minimum of every six to nine years for an array of organic chemicals including volatile organic chemicals (VOCs) and synthetic organic chemicals (SOCs), such as herbicides and pesticides. VOCs are byproducts of industrial processes and petroleum production and can also come from gas stations, urban stormwater runoff, and septic systems.
Sampling frequencies for these groups of organic chemicals can vary depending on the county in which your water system is located, whether the source has been granted a monitoring waiver, and whether there have been past detections of any of these organic contaminants.
Monitoring waivers are granted by the DOH and are based on a source's susceptibility rating (risk of contamination), water quality history, and information gathered from across the state.
If there were detections of organic contaminants obtained during the most recent round of compliance monitoring (2015–2020 for VOCs; 2012–2020 for SOCs), they are shown in the water quality data tables. If there are none reported in the tables, there were none detected.
Drinking water sources are sampled and tested a minimum of every six years for radioactive contaminants (radium 228 and gross alpha). These contaminants can be naturally occurring or the result of oil and gas production and mining activities.
If there were any detections obtained during the most recent round of compliance monitoring (2015–2020), they are shown in the water quality data tables. If there are none reported in the tables, there were none detected.
Thanks for taking the time to learn more about your water quality!
Important Contact Information
Washington Water Service Company
P.O. Box 336
Gig Harbor, WA 98335-0336
Office: (253) 851-4060
Toll Free: (877) 408-4060
Roy Stanton, Local Manager
NW Region-Eastsound Field Office
Doe Bay Water Users Association (DBWUA)
P.O. Box 28
Olga, WA 98279
Office: (360) 376-4990
Washington State Department of Health
Northwest Drinking Water Operations
20425 72nd Ave South
Kent, WA 98032-2388
2019 Water Use Efficiency
Water is a precious, limited resource. In the Pacific Northwest, drinking water for our growing population competes with other uses that include agriculture, industry, recreation, and maintaining an adequate stream flow for fish.
Doe Bay Water Users Association encourages our customers to be good stewards of our water resources. We monitor the amount of water we withdraw from Mountain Lake, and we track water losses and water sold to our customers to ensure compliance. Results for 2019 are as follows (reporting period 9/1/2019 to 8/31/2020):
- Total production: 16,328,957 gallons
- Total accounted usage: 12,368,431 gallons
- Total distribution system leakage: 24%
- Metered connections: 100%