Query Florida's statewide FLWMI layer to determine whether a parcel uses septic (OSTDS) or sewer wastewater disposal
domain: maps.floridahealth.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Query the FLWMI Wastewater FeatureServer layers at https://maps.floridahealth.gov/server/rest/services/FLWMI/FLWMI_Wastewater/FeatureServer with where=1=1&outFields=* to inspect available fields
Filter by parcel or county to scope results, since this is a statewide (all 67 counties) parcel-level layer
Use the wastewater-disposal classification field to determine septic/OSTDS vs. sewer for a given parcel
Cross-reference the companion drinking-water-source classification (public vs. private well) in the same dataset when researching both septic and well status together
Use the current host (maps.floridahealth.gov) directly — the older gis.floridahealth.gov host 302-redirects here, adding an extra hop
Known gotchas
This is a compiled/derived classification layer (aggregated from utility, local, and state sources), not a live permit-by-permit database — treat it as a screening tool, not a system-of-record for individual septic permits
Because it's parcel-polygon based, results are per-parcel, not per-structure — multi-structure parcels may return one record even if only some structures are on septic
No authentication required, but query the FeatureServer's root ?f=json first, since the exact layer index/name can shift between FLWMI updates
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