Consumer Confidence Report

The City of Enumclaw Water Utility is pleased to provide this report on the quality of the drinking water the city delivered in 2015. We want to keep you informed about the city’s water service and the on-going efforts made to provide a safe and dependable supply of drinking water.

Water Sources
The city owns and operates 3 water sources to the east of the city: Boise Springs, Watercress Spring and Well, and PC Johnson Wellfield. The city also has an emergency intertie connection to the Tacoma Water pipeline that passes through the city. This connection has not been used since 2003. The city plans to incorporate the Enumclaw Golf Course well into the municipal water system as an additional supply.

According to the Washington State Department of Health, the Boise and Watercress sources have a high susceptibility to potential sources of contamination while the wellfield has low rating. To protect the health of our customers all the city sources are treated with chlorine for disinfection. The City of Enumclaw does not add fluoride to its sources. The city does raise the pH of the Boise and Watercress sources to reduce the potential for the water to corrode metal piping. 
Explanation of Expected Contaminants
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 materials, and can pick up substances resulting from the presence of animals or from human activity.

Contaminants that may be present in untreated source water include:
  • Microbiological contaminants, such as viruses 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 storm 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 forestry, agriculture, urban storm water runoff, and residential uses.
  •  Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems.
  • Radioactive contaminants, which can be naturally occurring or be the result of oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, the federal Environmental Protection Agency (EPA) prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water that must provide the same protection for public health.
Drinking water, including bottled water, may reasonably be expected to contain at least a trace of some contaminants. The presence of contaminants does not necessarily indicate that 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.

Water Quality
The city’s drinking water is safe and meets or exceeds all federal and state requirements. Water quality sampling is conducted on a routine basis to monitor for contaminants and ensure the safety of the water. Items detected in the City of Enumclaw water system in 2015 are listed in the following summary table.

Summary Table of Water Quality Detections (Regulated at Treatment Plant/Distribution System)


Highest Level Allowed (MCL or MRDL)

Highest Level Detected Range of Level Detected or # Exceed AL Ideal Goals (MCLG)

Potential Sources of Contaminant


4 ppm

0.76 ppm

0.16 - 0.76 ppm

Not applicable

Treatment disinfectant additive

Total Trihalomethane

80 ppb

3.8 ppb

3.7 – 3.8 ppb


By-product of drinking water chlorination


10 ppm

1.8  ppm

0.8 - 1.8  ppm

10 ppm

Natural deposits. Runoff from fertilizer use. Leaching from septic tanks/sewage.

Summary Table of Water Quality Detections - Regulated at Consumer's Tap (1)


Highest Level Allowed (MCL or MRDL)

Highest Level Detected

Range of Level Detected or # Exceed AL

Ideal Goals (MCLG)

Potential Sources of Contaminant


15 ppb AL

2.0 ppb

0 sites exceed AL


Household plumbing


1.3 ppm AL

0.21 ppm

0 sites exceed AL

1.3 ppm

Household plumbing

(1) See Definitions for explanation of abbreviations used in the table. Data presented in the table are from 2015 or the most recent testing done in accordance with the regulations.  Many other substances were tested for, but not detected.
Notes from the EPA
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, 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 and Center for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by cryptosporidium and other microbiological contaminants are available from the Safe Drinking Water Hotline at 800-426-4791.
City of Enumclaw Water System Facts:
Number of Connections:  5,600
Miles of Water Mains:  143
Total Reservoir Storage: 2.74 million gallons
Water Department Staff: 8.2 Full Time Equivalents


Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.

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.

Action Level (AL): The concentration of a contaminant which, when exceeded, triggers treatment or other requirements which a water system must follow.  Action Level is reported at 90th percentile.

ppm: Parts per million or milligrams per liter

ppb: Parts per billion or micrograms per liter

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.

Commitment to Using Water Efficiently
The City is committed to conserving water to help meet future growth and comply with state law requirements for improving water use efficiency.  As required by state law, the City re-evaluated its water use efficiency goals as part of its 2013 Comprehensive Water System Plan update.  The adopted goals are as follows:
  • Goal #1.  Maintain a three year running annual average of less than 200 gallons per connection per day (gpcd) for single family residential usage.  Currently the average is 190 gpcd.
  • Goal #2.  Reduce the yearly ratio of maximum to average day demand so that by 2017 and thereafter it does not exceed 1.8.  The 2015 ratio was 2.30.

One of the measures approved by the City Council to help achieve Water Efficiency Program Goal #2 is implementation of a coordinated outdoor watering scheduling program.  Under this program, customers are requested to restrict their outdoor water usage (lawn irrigation, car washing, garden watering, etc) to odd/even days in accordance with their street address.  For example if your address is 2401 Railroad Street you would only use water outdoors on odd calendar days, whereas if your address is 2402 Railroad Street you would only use water outdoors on even calendar days.  In theory this could reduce the summertime peak water demand by as much as 50%.  Compliance would be voluntary.  If monitoring indicates low participation levels the measure would be re-evaluated to determine if it should be revised to be mandatory compliance with enforcement or if a different measure needs to be selected.

The City’s Water Use Efficiency Program is included as Appendix F of the City’s Comprehensive Water System Plan, which is available on the Water Utility webpage at, along with the City’s 2015 Water Use Efficiency Report.

Water Service Shutoff / Leak Adjustment
City code prohibits tampering with a meter.  If you need your water service shutoff for repairs please call the City Shops at 360-825-5541.  The Water Department encourages all customers to install their own shutoff valve on the house side of the meter.  This can facilitate a quick shutoff and prevent wasted water and possible flooding.  The City Code includes a provision for leak credits.  For information on the leak credit process, please call Utility Billing at 360-825-3591. Information on how to read your water meter and determine whether you have a leak
Informational Statement From the EPA About Lead in Drinking Water and Its Effects on Children
If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children.  Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. The City of Enumclaw is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components.  When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for thirty seconds to two minutes before using water for drinking or cooking.  If you are concerned about lead in your water, you may wish to have your water tested.  Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline at 800-426-4791 or at

Cross Connection Control Program
Protecting Our Water System From Contamination
A cross connection is a connection between a water pipe and a source of contamination. Examples include:
  • Hose-end spray applicators.
  • Irrigation systems.
  • Boiler make-up water lines.
  • Hose ends submerged in pools, stock tanks, hot tubs or buckets.
Hose Bib Vacuum Breaker
Cross connections are dangerous because they provide opportunities for contaminated fluids to be pulled back into the water system.  To protect our water supply, avoid using hose-end sprayers and maintain an air gap by keeping the hose end above the water surface when filling containers.  Irrigation systems are required to have a backflow assembly.  Backflow assemblies require a plumbing permit, must be inspected by a cross connection specialist, and must be tested by a certified tester when installed and yearly thereafter.  
Reporting Suspicious Activity or Water Main Leaks
As a customer of a publicly-owned water system you are also an owner and have an additional vested interest in seeing your water supply kept safe and in good operating order. Similar to a neighborhood watch program you are encouraged to be aware of your water system and be alert to anything that seems unusual, such as seeing a water truck connected to a fire hydrant or water flowing out of the ground where you haven’t seen it before.

To report any such observation or anything unusual pertaining to the water system, please call 360-825-5541 during normal business hours or 360-825-3505 at other times.
Capital Improvement Program
Two major improvement projects are planned for construction in 2016 and 2017 with funding provided by low-interest loans from the State Drinking Water Revolving Fund.  The improvements are identified in the 2013 Comprehensive Water System Plan and include:
  • Constructing a new 3 million gallon (MG) reservoir at 1835 Roosevelt Ave E.  
  • Construct a new well facility with booster pump station and related appurtenances to utilize the City’s golf course well for potable water supply.  Demolish the existing well building and decommission the well along with another nearby inactive well.  Demolish the Lower Fairway Hills BPS and expand Zone 983.

Constructing the Reservoir Foundation


Cross-section of the planned Well Facility

Thermal Expansion Protection for Customer Plumbing
To provide a measure of protection against backflow of water into the City water main and to facilitate meter maintenance, a check valve is installed at every water meter.  The check valve prevents relief of thermal expansion pressure from the customer’s hot water system into the City main.  If not relieved, the pressure could shorten the life of the hot water tank or cause other damage to the plumbing.  It is the customer’s responsibility to ensure that their plumbing system complies with current codes, including a properly installed and maintained temperature-pressure relief valve and expansion tank on the hot water heater.

Landscaping Around Water Meters
Spring and summer spur a lot of plant growth.  Excessive growth, however, may make it difficult to access and read your water meter.  The Water Department encourages you to locate your meter and if plant growth is infringing, please trim and cut back to allow the meter reader access for accurate reading.  Try to maintain a 2-foot perimeter around the meter if possible.  On all untrimmed areas, the Water Department will cut back as necessary.

Recognizing Your Water Department Staff 
You can recognize your water department staff at work by the logo on the City’s construction equipment or white service vehicles.  Personnel carry photo identification and wear work uniforms embroidered with their name.  You can feel assured that your utility is in good hands as the City's maintenance personnel are certified by the state Department of Health to perform water system maintenance and operation and regularly attend continuing education classes to maintain their certification.

Department Staff
Questions and Contact
City of Enumclaw Water Utility staff works hard to provide quality water to each and every tap.  We ask that all our customers help us protect our water, which is the heart of our community, our way of life, and our future.

If you have any questions about this report or concerning your water utility and/or want to know how you can be involved, please contact Scott Woodbury at or at 360-615-5728.  

Regulation and policy decisions relating to the utility are made by City Council at their regular meetings on the second and fourth Monday of every month at 7:30 PM in the City Hall Council Chambers at 1339 Griffin Ave.  Any water customer or interested individual is welcome to attend.  Also available for water utility customers is a toll-free hotline at 1-877-8NSF-HELP.