King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"


Parcels with Onsite Sewage Designations in King County

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image


Subject category: utility
Title: Parcels with Onsite Sewage Designations in King County
Feature Count: 624835
Feature Type: Polygon
Abstract: Project was to find, count and map onsite septic system (OSS) served parcels in King County. Additionally, sewer connected parcels were also identified to exclude them from expected OSS parcels. The starting base layer was a parcel layer for all of King County (Plibrary.PROPERTY.parcel_area) from about September of 2015. Project staff used various means to identify and catalogue sewer connected, OSS served, vacant and other identified parcels for all of King County.
Purpose: The purpose of this data set is to manage a list of OnSite Septic System (OSS) parcels in King County.
Status: Complete
Updated: As needed
Time period of content: (single date,as YYYYMMDD):: 20210831
Time period of content: (date range, as YYYYMMDD):: -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Not Available
Place Keywords: Pacific NW, King County, WA, Washington state,
Theme Keywords: utility, sewage, septic, sewer connections, capacity charge, OSS, onsite,
Lineage: Available
Supplemental Information: Corrections to this data set will be made and as additional information is received, processed and edited in the attributes of this set. There is no timeframe on when these changes will occur, and will occur as needed.


Maintained by:
Public Health - Seattle and King County
Primary: Peter Isaksen, Project Manager, 206-263-8479
(How to e-mail a County contact)
Secondary: KCGIS Center; This mailbox is monitored during business hours.

Attribute Information

_PIN_Parcel Identification NumberTen digit identifier, may begin with leading zeros
_ExcludeOn_Type of wastewater system like sewer connection, OSS, or also Vacant, Water, etc. Integer value decoded in ExpExcludeOn
_SewerConnection_Sewer connection Yes, or NULL Integer value decoded in ExpSewerConnection
_SewerAgency_Sewer Agency serving this sewer connected parcel Integer value decoded in ExpSewerAgency
_CapacityCharge_Parcel is or was listed on Capacity Charge table Yes, or NULL
Capacity Charge status unknown
YesParcel is or was listed on Capacity Charge Table
_Comments_Connection source verified by, other comments regarding property and or connection Free text


Access: Access Constraint: Data is not available on GIS Data Portal, it may be available via a custom data request

Use: Use Constraint: King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.