Lead Service Line Inventory
This is important information about your drinking water. If you need assistance understanding this information, please have someone translate this information for you or speak with someone who understands it.
-Это важная информация о вашей питьевой воде. Если вам нужна помощь в понимании этого информации, попросите кого-нибудь перевести эту информацию для вас или поговорить с кем-то, кто ее понимает.
-Esta es información importante sobre su agua potable. Si necesita ayuda para entender esto información, pídale a alguien que le traduzca esta información o hable con alguien que la entienda.
-这是有关您的饮用水的重要信息。如果您需要帮助理解这一点
信息，请让人为您翻译该信息或与理解该信息的人交谈
Highline Water District's mission is to provide high-quality water and excellent customer service while effectively managing our infrastructure to ensure a reliable water system today and for future generations. In compliance with the Environmental Protection Agency (EPA) and Washington State Department of Health (DOH), we are proud to report that we have not identified any lead service lines within the Highline water distribution system.
EPA's Lead and Copper Rule Revisions, published in 2021, require all Community Water Systems, including Highline Water District, to prepare and submit an inventory of Lead Service Lines (LSLs) to DOH, in 2024.
How The District Investigate Services in Our System
We used the following four criteria to confirm that there is no lead in our distribution system:
1. District Records & GIS Database: The District maintains an extensive database that includes most of the material types for district-owned service lines.
2. Service Line Installation Date: Lead was removed from King County's approved material list in the 1957 plumbing code (per King County Resolution 16802). All service lines installed after this resolution are classified as non-lead.
3. Service Line Size: Lead pipes used for water services were typically 2 inches or smaller. Service lines larger than 2 inches are classified as non-lead.
4. Statistical Modeling & Inspections: We performed physical inspections by potholing water services, representing a sample of the remaining "unknown" materials in our system. None of these inspections revealed lead, allowing us to classify the remaining services as non-lead with over 95% certainty.
Ongoing Maintenance and Customer Involvement
Although the District has completed its initial inventory,
we will continue to maintain and update service line information as
additional investigations occur.
We encourage our customers to help us by reporting the material of their water service lines. If you live within the District service area and know your service line material, please participate in our brief survey. Visit our interactive map and complete the Water Service Line Material Survey at https://lead-service-line-inventory-highlinewater.hub.arcgis.com/.
