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Welcome to Horizon Hills Water System

Serving property owners in Horizon Hills Estates this Group B community water system provides water service to residential property owners on Horizon Hills Road, Dawn View Drive, and a small portion of Lost Mountain Road in Sequim.


Horizon Hills Estates is a community of water view parcels originally founded by a select group of developers who loved the Sequim area and wanted to preserve the open spaces and views in a quality community with friendly but protective covenants (CC&R’s), and with well planned unpaved roads to preserve the natural feeling, foliage, and animal habitat. 


The water provided by Horizon Hills Water System is tested annually and the system is maintained and inspected on a regular basis.

New to Horizon Hills Estates?

Contact us at support@horizonhillswatersystem.com

You’ll find the following information and helpful tools on our site.

  • Residential Water Costs
  • System & Fire Hydrant Map
  • Online Payment
  • Water Test Results
  • Contact information

For Buyers, Realtors, Escrow & Title Officers

Horizon Hills Water System has been managed and operated by the original developers of Horizon Hills Estates along with their family members who are longtime residents on the Olympic Peninsula and experienced in land development and utilities. 

Despite the similarity in names, the community of Horizon Hills Estates is separate from the Horizon Hills Water System. 

In Horizon Hills Estates, there is an active volunteer homeowners association.  Not all Horizon Hills Estates property owners are connected to the water system.  Just as the management of Horizon Hills Water System are not experts on the community of Horizon Hills Estates, the homeowners association (including its board members) are not qualified experts on the water system.

In order to avoid confusion, questions regarding the water system including transfers of ownership and maintenance of the system, should be addressed to: 360.808.0338 or support@horizonhillswatersystem.com.  If you do not receive a prompt reply, please resubmit your request. 

Billing Update:

Due to staffing and merchant banking services affecting office administration during Covid, water users did not receive their annual billing for water services. Annual water tests were performed and the system was maintained. 

We realize this caused an inconvenience for some water users and apologize for confusion.

Users who have submitted their 2022 and 2023 payments of $660.00 per year can expect invoicing for 2024 usage in the spring of 2024. Users who have not submitted their payments of $660.00 per year for 2022 and 2023 will be invoiced with due dates into spring of 2024 as well as invoicing for 2024.

Users may send their annual payment to:

Horizon Hills Water System
PO Box 1226
Carlsborg, WA 98324



We’re here to help! Feel free to contact us with any service-related questions. Just click here to fill out our contact form.

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