Query Sonoma County's Permit Sonoma septic (OWTS) permit records via the county's public ArcGIS REST API
domain: socogis.sonomacounty.ca.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
GET https://socogis.sonomacounty.ca.gov/map/rest/services/OWTSPublic/Permit_Sonoma_Septic_SEP_Permits/FeatureServer/0/query with where=1=1 and outFields=* to see the full schema
Filter by parcel using the B1_PARCEL_NBR field, or by status/date using B1_APPL_STATUS and B1_APPL_STATUS_DATE
Request GeoJSON output by adding f=geojson (default is Esri JSON)
Use B1_PER_TYPE / B1_PER_SUB_TYPE and OWTS_Type / Type_of_System fields to distinguish permit type and onsite wastewater system classification
Paginate with resultOffset/resultRecordCount if a query approaches the service's maxRecordCount of 15,000
Known gotchas
No authentication is required, but this is a live county GIS layer with no published SLA — expect occasional downtime during county IT maintenance windows
Field names are county-specific abbreviations (e.g. B1_ALT_ID, B1_FILE_DD) undocumented in prose anywhere — hit the layer's ?f=json metadata endpoint to get field aliases/types before parsing
This is a permits/application dataset, not a real-time inspection scheduler — don't assume it reflects same-day status changes
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