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Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. Water Conservation Choose your category and click on a link. Can't find the information you're seeking? Give us a call at (425) 337-3647 Water Conservation Tips Water Conservation Kits Lawn Watering Calendar for 2025 (English) Our Water Use Efficiency Program Water Conservation Tips All Year Long Toilets are the #1 cause of undetected water leaks in the home (and resulting high water bills)—a leaky toilet wastes between 30 and 200 gallons of water per day! Replace worn toilet flappers, and consider replacing old toilets with water-saving newer models. Learn more Faucets are the second most common cause of water leaks. Replace rubber washers and gaskets in your faucets, hoses and shower heads. Learn more Take showers instead of baths: a 4-5 minute shower uses roughly 10 gallons of water compared to up to 50 gallons for a bath. Take shorter showers: every minute is 2.5 gallons! Install energy efficient shower heads, toilets, and faucet nozzles. Turn off the tap while shaving or brushing teeth. Fix leaky faucets, hose bibs, sprinkler heads, and toilet flappers. Wash large loads of laundry and wait until your dishwasher is full to run it. If you've only got a few dirty plates or you're in a small household where it's not practical to wait until the dishwasher's full, you're better off washing in the sink. Just remember to turn off the water while you're scrubbing. When changing out your pet's water dish or draining the aquarium to clean, use the old water on house plants. Pay close attention to your containers: unglazed terra cotta clay containers are beautiful, but they dry out quickly. Wherever possible, choose glazed ceramic, plastic, or other hard-material pots. During Summer's Peak Usage / Higher Rates Check irrigation systems for freeze damage, broken parts, and slow leaks (this tip can save schools and other municipal facilities thousands of dollars every year!) Unusually damp or green patches of grass are usually the first sign of a leak. Inspect your irrigation system for leaks and breaks at least once a month while it is being used. Water early or late in the day to reduce evaporation. Avoid watering in the head of the day and/or when it's windy. Apply water to the roots, not the foliage: Watering the roots reduces evaporation and the risk of plant disease. Using tools that direct water to the roots—like a water wand or a drip irrigation system—will help keep water where it is most useful. Water outdoor plants twice a week; apply directly by hand. Install drip irrigation for maximum watering efficiency. Apply a layer of mulch around plants to help retain water. Let your lawn go dormant: water deeply once a month to keep roots alive. Use a broom or ShopVac rather than a hose to clean sidewalks, driveways and patios, rather than hosing them down—this can save up to 150 gallons each time! Save pressure washing jobs until Fall rains return. Wash cars less often, at locations that recycle water. Turn off your garden hose at the faucet, not at the nozzle (nozzles are notorious for slow leaks). Water Conservation Components Silver Lake Water & Sewer District offers limited quantities of the following water conservation components to our customers.These items can help you manage your water usage, especially during the summer. All pieces install very easily with few tools required. Just call us to make sure we have them in stock before you come pick up! (425) 337-3647 Residential Showerhead & Faucet Kit One Low-Flow Showerhead Two Bathroom Faucet Aerators Teflon tape Outdoor Watering Components Toilet Leak Detection Kit

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. If you have a water or sewer emergency, call us at (425) 337-3647 Welcome to Silver Lake Water & Sewer District Serving more than 56,000 residents in Mill Creek and unincorporated Snohomish County since 1934 Attend a Public Meeting Pay Online Now About Your Bill Customer Assistance Forms & Documents Contact The District News & Announcements Upcoming Board of Commissioners Meeting Next Meeting: Regular Meeting Thursday, April 10th Starting at 5:30 p.m. Learn More Lead Service Line Inventory Published The District's inventory is complete, we are pleased to report that no lead service lines were discovered in completing the inventory. Learn More We're Hiring! Utility Worker - Apprentice Learn More News Archive Our Mission Silver Lake Water & Sewer District's mission is to provide high quality, safe and reliable water and wastewater services, while practicing good stewardship of both natural and financial resources. As our service area grows, we are continually making investments in our infrastructure to ensure an adequate supply of water is readily available to meet the needs of all customers. About Your Service About Us

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. Cross Connection Control Help Us Keep Your Water Safe with Cross Connection Control Keeping water safe is a two-way street. We rely on you, our customers, to be aware of any cross connection to the water system that you might have on your property, and to protect those connections with a Backflow Prevention Device to ensure the safety of our drinking water. What is a Cross Connection? A cross connection is a point in a plumbing system where it is possible for a non-potable substance to come into contact with the potable drinking water supply. For homeowners, these commonly include irrigation systems, private fire sprinkler systems, boiler systems, and pool or pond equipment. What is Backflow? Backflow occurs when water or other substances flow in the opposite direction than intended—such as the water in an irrigation system flowing back towards the water source once it's turned off—which allows contaminants to enter the public water system or consumer's plumbing. A backflow incident occurs when biological, chemical, or physical contaminants enter the drinking water supply (under backflow conditions) via unprotected cross-connections. Backflow incidents may cause injury, illness, or death. What is Required to Keep Water Safe? In our complex water system, everything is connected. Washington State Administrative Code (WAC 246-290-490 ) requires customers to install, maintain, and test Backflow Prevention assemblies (examples shown above) to keep pollutants and contaminants from entering the clean drinking water system and prevent backflow incidents. This same Code requires Silver Lake Water & Sewer District maintain a backflow prevention program, in which we send out annual reminder letters to customers with Backflow Prevention Devices when their device's annual test is due. What Are Your Responsibilities? If you have irrigation, fire sprinkler or other water-using systems, you will need to: Have a Backflow Prevention Device installed at the connection between your systems and the District's public water system; Have a state certified Backflow Assembly Test performed annually (see a link to a list of certified testers below); and The tester is required to send in your test report using our online portal: Tokay WebTest Portal . WebTest Portal WebTest Training Guide WebTest Training Video Additional District Resources Certified Backflow Assembly Tester List District Code regarding Cross Connection Control Brochure for Residential Irrigation Backflow Prevention Click Here to Schedule an Annual Water Truck Inspection Outside Resources American Backflow Prevention Association Western Washington Cross Connection Prevention Professionals Group City of Everett Public Works Brochures If you are an existing backflow customer, be sure your information is up to date for receiving reminders, and get your annual test scheduled in advance. If you have questions about your due date, or need a list of registered testers, or have any questions at all, please contact us: backflowtests@slwsd.com (425) 659-2304

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. Public Records Requests for as-built drawings may be submitted directly to the District Engineer. A public records form is not required for processing these requests. Resolution 783 , adopted by the Silver Lake Water & Sewer District Board of Commissioners on October 10, 2019, defines the availability of District public records for public inspection and copying. Chapter 2.35 of the district code, contains procedures relating to inspection and copying of district records. Requesting Public Records Please download and complete this form to request access to public documents. Return the completed form to the District office. Charges for photocopies and electronic files are explained on the form. Previously approved Commissioner Meeting minutes from recent years can be found here .

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. Contact Engineering This is not a public disclosure request. Find the public disclosure request form here. To contact District Engineering, please complete the form below. First Name Last Name Email Phone Address Parcel Number Message: Submit We've received your message and will respond to you shortly!

Silver Lake Water & Sewer District provides water utility service to over 56,000 customers in the Bothell, Washington region since 1934. About Your Service Service Area Water Source Water System Water Quality Sewer System LSL Inventory Our Service Area Click here to view the District's service area boundaries in Google Maps . Other Neighboring Sewer and Water Utility Providers Snohomish County PUD 425-783-1000 City of Everett 425-257-8999 Alderwood Water & Wastewater District 425-743-4605 Cross Valley Water District 360-668-6766 Mukilteo Water District 425-355-3355 Woodinville Water and Sewer 425-487-4100 City of Snohomish 360-568-3115 Our Source of Water Silver Lake Water & Sewer District's water comes from a large freshwater lake known as Spada Reservoir, located about 30 miles east of Everett, Washington—the primary source of high quality drinking water for the majority of Snohomish County . Spada Reservoir is part of the Upper Sultan River Watershed, an 80 square mile area that is one of the wettest watersheds in the continental United States, with an average annual rainfall of approximately 165 inches. Water from Spada Reservoir is treated at the City of Everett Water Filtration Plant before being transport by pipeline to the City of Everett and distributed to several agencies including the District. Silver Lake Water & Sewer District purchases our treated water from the City of Everett, Alderwood Water & Wastewater District and Clearview Water Supply Agency; the majority comes from Clearview Water Supply Agency—an interlocal group formed by Alderwood, Silver Lake and Cross Valley that offers the same water at the lowest cost. Water System Our Water System Silver Lake Water & Sewer District was originally formed as a municipal corporation in 1934 to provide water service to an unincorporated area of Snohomish County. Now almost 90 years later, we provide this service to over 18,773 homes and businesses, encompassing over 56,000 individuals. As of 2022, our customer base consumed an average of 4.1 million gallons of water per day and 1.5 billion gallons per year. Water System Components 3 Reservoirs: Reservoir No. 2 holds 4 million gallons (MG), Reservoir No. 3 holds 4.2 MG, and Reservoir No. 4 holds 8 MG—for a total water storage capacity of 16.4 MG. 10 Master Meters interconnected for back up water supply from the City of Everett, Cross Valley Water District, Clearview Water Supply Agency, and Alderwood Water & Wastewater District 3 Pump Stations, all collocated with reservoirs 16 Pressure Reducing Stations and Valves separating three distinct pressure zones 207.11 Miles of water main (piping) 36 Intertie or isolation valves 1,799 Fire Hydrants supporting 3 Fire Districts 18,773 Metered Connections/Customers Our Water System Plan Water Quality Our Water Quality Water quality begins at the source: the Sultan Basin is carefully monitored, the watershed is patrolled, and human activities are limited to minimize the impact on the naturally pristine water. From the lake, water travels to the City of Everett's water treatment plant, where it undergoes coagulation, flocculation, filtration and disinfection, before being distributed to the Clearview Water Supply Agency, of which Silver Lake Water & Sewer District is one of three members. While Silver Lake Water & Sewer District still purchases some of our water from the City of Everett, the majority is supplied by Clearview. Annual Water Quality Reports 2023 | 2022 | 2021 | 2020 2019 | 2018 | 2017 | 2016 Additional Links about Water Quality City of Everett Water Quality Office (425) 257-8800 State Department of Health 1-(800)-521-0323 U.S. Environmental Protection Agency 1-(800)-426-4791 PFAS Monitoring Silver Lake Water & Sewer District’s drinking water remains safe and protected from the group of manmade chemicals labeled per- and polyfluoroalkyl (PFAS) substances. Learn more and view test results here > Our Sewer System The District's service area is split into two separate sewer basins. Services in the Everett basin flow to the City of Everett for treatment and disposal. Services in the Alderwood basin flow to the King County Department of Natural Resources (Metro) for treatment and disposal, by way of Alderwood Water and Wastewater District. The original basic sanitary sewer collection system was constructed in 1970 and 1971 by Fircrest Sewer District. In 1980, Silver Lake Water District merged with Fircrest Sewer District, later becoming the current Silver Lake Water & Sewer District servicing 17,545 customers in 2022. Sewer System Components 22 Lift Stations (including the private Glacier Peak Station and the soon-to-be-online Brasswood Station) 173.25 Miles of Pipe 5,225 Manholes 49 Lamp Holes (smaller clean out access) 17,545 Connections/Customers Our Sewer System Plan Lead Service Line Inventory In 2021 the US EPA implemented the Lead and Copper Rule Revision which included a requirement for all public water systems to complete an inventory verifying that both the public and private service lines are not made of lead. The use of pipes that contain lead has been prohibited since 1986 and the rules were amended again in 1996 extending lead free requirements to plumbing fittings and fixtures. Many of the homes and business, and their associated water services within the District were constructed after these bans, however a subset constructed before these dates required verification. The work to verify the service lines has been a significant undertaking and the District is pleased to report that No Lead Service Lines were discovered in completing the Lead Service Line Inventory. A variety of approved methods were utilized by District staff to complete the investigation and are documented in the map for all water service locations. Residents can view information about their water service line using the Lead Service Line Inventory Map. Please contact us with any questions or for more information about sources of lead in drinking water.

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. Contact Us Location & Phone Silver Lake Water & Sewer District 15205 41st Avenue SE Bothell, WA 98012 (see map below ) (425) 337-3647 Hours Monday, Tuesday, Thursday, and Friday 8:00 AM - 4:30 PM Wednesday 9:00 AM - 4:30 PM Closed Saturday, Sunday, and major holidays In Case of Emergency If you have a water or sewer emergency after hours, call our regular number, then press “1” to hold for an Emergency Operator. (425) 337-3647 Press 1 District staff are on call 24 hours a day, 7 days a week to assist you with water and sewer emergencies. Submit We've received your message and will respond to you shortly! Map

Silver Lake Water & Sewer District actively maintains and upgrades your water and sewer infrastructure, as reflected in these recent projects Permitting Overview of the Permitting Process For a New Water Meter Submit a residential or commercial service connection application and pay the applicable District fees when invoiced. Additional costs, permitting, and/or contractor work may be required based on size, condition, and location of the existing service line between the water main in the street and the meter box. If there is no existing water main / pipe, you will be required to apply for a Developer Extension Agreement. More information is available on the Developer Process page. For a New Sewer Connection The customer is responsible for the cost of hiring a contractor to install sewer lines and restore the area. This work may entail different components depending on the type of sewer infrastructure installed near the property. If unknown, contact Engineering for more information. If there is an existing sewer lateral/stub to the property line: The custom er must submit a residential or commercial service connection application , pay the applicable District fees when invoiced, and hire a contrac tor to install a side sewer that meets District standards. Upon completion, the District will inspect and approve the work. If there is no sewer lateral/stub, or no sewer main in front of the property: The customer must apply for a Developer Extension Agreement, and hire a contractor to install a lateral and /or new sewer main. More information is available on the Developer Process page. Water / Sewer Availability A letter of water and/or sewer availability is required for most building permits in the City of Mill Creek or Snohomish County. It is also the typical first step in the land development process. Please note on the application if the work involves an Accessory Dwelling Unit (ADU) or an adult family home. Please include any building or site plans that show the proposed work. Application for Water & Sewer Availability Response. Service Connection Applications For a new water meter, and/or new sewer connection to an existing stub on a residential property, use the Application for New or Modified Residential Water and/or Sewer Service form. For a commercial service connection or irrigation service, use the Application for new or Modified Irrigation, Multi-Family / Commercial Water and/or Sewer Service form. Request As-Builts from the District Engineer Contact District Engineer

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. News & Events Board of Commissioners Meetings Held on the 2nd and 4th Thursdays each month Silver Lake Water & Sewer District welcomes the public to attend and comment at our Board of Commissioners meetings, held on the second and fourth Thursdays of each month at 5:30 p.m. Currently, these meetings are being held in a hybrid format (in-person and virtually). If you would like to attend in person, please contact us at (425) 337-3647 for more information. If you would like to attend by phone, please use the conference information below: Telephone Number: 206-412-5430 Conference ID: 418 748 427# Next Scheduled Meeting: Regular Meeting - Thursday, April 10, 2025 at 5:30 p.m. View Agenda View Archived Minutes Read Our Newsletter The District publishes two newsletters a year: Spring/Summer, and Fall/Winter. View Our Newsletters News Archive Notice of Public Hearing On Communications Site Use and Easement Agreement Thursday, November 14, 2024 Starting at 5:30 pm NOTICE IS HEREBY GIVEN that the Board of Commissioners of the Silver Lake Water and Sewer District will hold a Public Hearing at 5:30 p.m., or as soon thereafter as can be heard on Thursday, November 14, 2024, to consider approval and adoption of a resolution authorizing the District to enter into two Communications Site Use and Easement Agreements (Easement Agreements). There is an opportunity for in-person participation; however, the public is encouraged to attend and provide comment via teleconference. Telephone Number: 206-412-5430 Conference ID: 650 069 747# Notice Is your garden hose making your household water funky? During the summer, the most common cause of water taste or odor complaints we receive is a pressurized garden hose that has backflowed into the home’s plumbing system. Here are some tips to help you with this issue: Disconnect the hose and run cold water from your faucet for a few minutes to flush the pipes. Need a sip of water on a hot day? Get it from your internal sources (sink or refrigerator) instead of a garden-variety garden hose which aren’t manufactured for delivering potable (drinking) water. If the taste or odor is still present after detaching the garden hose from external spigots and flushing your pipes, give us a call at 425-337-3647. Solar Power Coming to District Headquarters Department of Commerce grant funding successful In 2022, District staff applied for the Washington State Department of Commerce Solar Retrofit Grant and were successful in acquiring $75,000 in funding to put towards installing 100 kW of solar power at the District Headquarters. In total, the state grant awarded $1.4 million to 14 different projects, adding over 1 MW of power generation to public buildings. There have been significant changes to the project since the conception, including the possibility of receiving an additional rebate of the project cost via new Federal Government legislation. According to preliminary proposals, the estimated project cost will be $325,930, including $30,000 of contingency funding and $75,000 awarded by the Commerce Grant. The federal rebate may amount to an additional 40% reduction in the District’s costs. The District expects installation work to start in possibly March or April of this year, with construction taking less than a month. When complete, a 100 kW AC solar roof array will offset approximately 1/3 of our Headquarters building's electricity consumption. More information about the awardees and program can be found here. Notice of Public Hearing to Discuss Rate Change Thursday, April 25th Starting at 5:30 pm NOTICE IS HEREBY GIVEN that the Board of Commissioners of the Silver Lake Water and Sewer District will hold a Public Hearing at 5:30 p.m., or as soon thereafter as can be heard on Thursday, April 25, 2024, for the purpose of accepting public testimony of the proposed adjustments to the rates for water and sewer service. There is an opportunity for in-person participation; however, the public is encouraged to attend and provide comment via teleconference. The public is invited to attend the Public Hearing and address the Board of Commissioners regarding the proposed adjustment either in-person or by teleconference. The meeting will be held at the District Headquarters, at 15205-41st Avenue SE, Bothell, WA 98012. At the close of the Public Hearing, the Board of Commissioners will consider adopting a Resolution to increase rates for water and sewer service. Telephone Number: 206-412-5430 Conference ID: 838 103 201# Notice

Silver Lake Water & Sewer District provides water utility service to over 56,000 customers in the Bothell, Washington region since 1934. About Your Bill Five Ways to Pay Always include your full 10-digit account number on all methods of payment. NOTE: we do not accept credit cards or bank Electronic Funds Transfer (EFT) payments for new connection fees or other types of invoices from the District. View Rates and Fees AutoPay - Set Up or Cancellation District-Direct AutoP ay is provide d free of charge, and is for customers who want payment of th eir invoices to draw automatically from their bank account on the due date of the invoice. To sign up or cancel , please click here. Pay By Mail Include your account number on your check or money order and mail to: Silver Lak e Water & Sewer District PO Box 3784 Seattle, WA 98124 Deliver In Person (Office or Drop Box) Bring cash, check, money order, credit/debit card to our office during business hours (credit/debit card fee: $4.25); or place a check or money order (no cash) in the drop box in o ur parking lot at: 15205 41st Avenue SE Bothell, WA 98012 Pay By Phone Have your full 10-digit account number ready and call 1-844-956-1375 to use your credit/debit card, or bank Electronic Funds Transfer (E FT) to pay via our third party payment processo r, I nvoice Cloud. The fee for paying by ph one with a credit/debit card is $5.00; the fee for paying by phone using EFT is $ 3.60. Pay Now Online Have your full ten digit account number ready, and use your credit/debit card, or bank E lectronic Funds Transfer (EFT) to pay online via our third party payment processor, Invoice Cloud . The fee for using a credit/debit card is $4.25; the fee for using EFT is $2.85. Rates and Fees 2024 Sewer Rate Adjustments take effect in May Current Water & Sewer Rates Water Connection Fees Sewer Connection Fees - Alderwood Sewer Connection Fees - Everett Other Charges and Fees Comparison of Peer Agency Water and Sewer Rates 2021 Water and Sewer Rate Study by Katy Isaksen & Associates King County Capacity Charge Information

Silver Lake Water & Sewer District provides utility service to over 56,000 customers in the Bothell, Washington region since 1934. As Built Request This is not a public disclosure request. Find the public disclosure request form here. SLWSD is only able to provide: Water and sewer as-builts within public right-of-ways or easements. Side sewer connections to buildings. Please complete the form below: First Name Last Name Email Phone Address for the As-Built Request Parcel Number Type of As-Builts Needed (please select all that apply): Water & Sewer within right-of-way / easement Side Sewer Connection Other If "other", please specify with detailed information Submit We've received your message and will respond to you shortly!

Silver Lake Water & Sewer District’s drinking water remains safe and protected from contaminants, including the group of manmade chemicals labeled per- and polyfluoroalkyl (PFAS) substances. PFAS Monitoring Silver Lake Water & Sewer District’s drinking water remains safe and protected from contaminants, including the group of manmade chemicals labeled per- and polyfluoroalkyl (PFAS) substances. The District sources its water from the City of Everett. Due to the protected nature of their watershed, which prohibits activities like firefighting training, manufacturing, and agriculture, there are no point sources of PFAS within our source water. What are Perfluoroalkyl substances (PFAS)? PFAS are a group of chemicals that are used widely and are commonly found in things like firefighting foam agents, the manufacture of non-stick materials for cooking (such as Teflon), and fabric protectants. Learn More: Environmental Protection Agency Washington State Dep't. of Health Background and History of PFAS Monitoring In 2016, The Environmental Protection Agency (EPA) released a health advisory for drinking water pertaining to two of the compounds found in the PFAS group: Perfluorooctanoic acid (PFOA) and Perflourooctanesulfonic acid (PFOS). Health advisory levels are non-enforceable guidelines that are intended to protect human health. The health advisory level is 0.07 parts per billion (ppb) for PFOA and PFOS combined. The Washington State Board of Health (WSBOH) recently revised the Group A drinking water rules to require water systems to monitor for select PFAS compounds beginning in 2023. WSBOH established state action levels (SALs) for five selected PFAS compounds as follows: Perfluorooctanoic acid (PFOA) - 0.010 ppb Perfluorooctane sulfonic acid (PFOS) - 0.015 ppb Perfluorononanoic acid (PFNA) - 0.009 ppb Perfluorohexane sulfonic acid (PFHxS) - 0.065 ppb Perfluorobutane sulfonic acid (PFBS) - 0.345 ppb Exceeding a confirmed SAL requires a water system to provide public notification and follow-up monitoring. While exceeding a SAL does not require a water system to treat for the contaminant, the SALs are intended to advise water systems on when to take action to lower contaminant levels to provide for safe, long-term consumption of drinking water. Testing Your Drinking Water for PFAS In 2015, Silver Lake Water & Sewer District participated in monitoring for PFAS in its drinking water under the Unregulated Contaminant Monitoring Rule 3 (UCMR 3). No PFAS compounds were detected in the Districts drinking water as shown in Table 1 below: Table 1: In 2023 through May 2024, the District monitored our drinking water quarterly for an expanded list of PFAS compounds under the EPA’s current Unregulated Contaminant Monitoring Rule (UCMR 5 ) . Once again, no PFAS compounds were detected in the District's drinking water as shown in Table 2 below: Table 2: