GIS Data Catalog

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Layer information

Layer Name	septic_onsite_parcel_area
Subject Category	Utility
Title	Parcels with Onsite Sewage Designations in King County
Feature Count	635201
Feature Type	Polygon
Published Date	As needed
Spatial reference	WA State Plane North
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
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.

Attribute information

OBJECTID From Esri	Description Internal feature number. Domain Sequential unique whole numbers that are automatically generated.
PIN From King County	Description Parcel Identification Number Domain Ten digit identifier, may begin with leading zeros
ExcludeOn From King County	Description Type of wastewater system like sewer connection, OSS, or also Vacant, Water, etc. Domain Integer value decoded in ExpExcludeOn
SewerConnection From King County	Description Sewer connection Yes, or NULL Domain Integer value decoded in ExpSewerConnection
SewerAgency From King County	Description Sewer Agency serving this sewer connected parcel Domain Integer value decoded in ExpSewerAgency
CapacityCharge From King County	Description Parcel is or was listed on Capacity Charge table Yes, or NULL Domain Yes - Parcel is or was listed on Capacity Charge Table
Comments From King County	Description Connection source verified by, other comments regarding property and or connection Domain Free text
ExpExcludeOn No Source Noted	Description Not Found Domain Not Found
ExpSewerConnection No Source Noted	Description Not Found Domain Not Found
ExpSewerAgency No Source Noted	Description Not Found Domain Not Found
WastewaterTreatmentType No Source Noted	Description Not Found Domain Not Found
SHAPE From Esri	Description Feature geometry. Domain Coordinates defining the features.
SHAPE.STArea() No Source Noted	Description Not Found Domain Not Found
SHAPE.STLength() No Source Noted	Description Not Found Domain Not Found

Summary

The purpose of this data set is to manage a list of OnSite Septic System (OSS) parcels in King County.

Description

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 (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.

Contact information

Maintained by	Department of Public Health
Primary	Daniel Casey dcasey@kingcounty.gov

Terms of Use

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.

Change history

12/30/2016	Assembled various ancillary datasets. Used these data to update the status of the parcel.The status was generated by excluding known sewer connected parcels as well as parcels that are vacant, have no living structures that would require sewage, and or parcels that are not living unit containing like water, forest, parklands, etc. Various data sources were used for the initial analysis including Aerial photos, Oblique photos, and Assessors data and other county and city datasets as needed. Coordination with the 42 Sewer Agencies within King County was used to help identify the sewer connected parcels. Also, the Capacity Charge program shared their data to provide additional proof of sewer connections since this charge is paid by property owners that connect to the sewer system and that are billed for this connection over 15 years. Although this data set is intended to only track actual OSS parcels, the sewer connected parcels will be updated as new and or corrected lists, or other evidence is provided. Since parcels do change over time, it is expected that the parcel layer will be updated, as needed, and that a new parcel layer will be substituted. This will require a process to identify parcels that no longer exist, as well as parcels that are newly created. These changes will be tracked so that this file, as well as other OSS databases can be edited for these changes.
9/1/2015	Copy made of PARCEL_AREA from September 2015. Added fields to data design to capture information about status of the parcel.