NHDdata
Data transparency

California county coverage matrix

Every cell below links to the upstream data source we ingest for that county — tax roll, tax bill, Mello-Roos, and city/county hazard overlays. The legal NHD disclosure is the same statewide; this matrix is where the per-county plumbing is published in the open.

Tax bill (per-APN)

51of 58 green

Tax roll (bulk)

58of 58 green

Mello-Roos / CFD polygons

49of 58 green

Statewide hazard layers (FEMA flood, CAL FIRE FHSZ, CGS Alquist-Priolo, Seismic Hazards, Tsunami, DWR dam inundation, CalGEM wells) are 100% covered for all 58 counties via authoritative state and federal feeds — the matrix below tracks the county-level tax, assessment, and Mello-Roos data that varies county-by-county.

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Showing 58 of 58 counties
CountyRankRegionPopulationBulkBillCFDNoSTFloodFireFaultLiqGeoAirportOther
Green coverageacross 58 counties58/ 5851/ 5849/ 5849/ 5851/ 5848/ 5846/ 5851/ 5851/ 5818/ 5851/ 58
Los AngelesPartial1southern9,663,345
OrangePartial2southern3,144,863
San DiegoBulk3southern3,289,701
Santa ClaraBulk4bay_area1,869,658
RiversideBulk5inland_empire2,473,205
San BernardinoBulk6inland_empire2,200,831
AlamedaBulk7bay_area1,620,283
SacramentoBulk8central_valley1,607,027
Contra CostaBulk9bay_area1,148,716
FresnoBulk10central_valley999,101
San FranciscoBulk11bay_area808,988
San MateoBulk12bay_area729,181
KernBulk13central_valley922,529
VenturaPartial14central_coast833,652
SonomaBulk15north_coast482,650
Stanislaus16central_valley552,878
Tulare17central_valley482,922
San Joaquin18central_valley803,032
Placer19sierra418,308
Santa Barbara20central_coast448,229
Santa Cruz21central_coast262,356
Solano22bay_area452,305
Napa23bay_area133,355
MarinBulk24bay_area257,774
San Luis Obispo25central_coast281,712
El Dorado26sierra191,185
Madera27central_valley159,410
Kings28central_valley152,486
Monterey29central_coast437,907
San Benito30central_coast66,677
Yolo31central_valley221,164
Nevada32sierra101,396
Shasta33north_coast180,531
Yuba34central_valley86,671
Sutter35central_valley99,633
Mendocino36north_coast91,305
Humboldt37north_coast135,558
Glenn38central_valley28,917
Tehama39north_coast65,824
Trinity40north_coast16,060
Del Norte41north_coast27,743
Siskiyou42north_coast43,329
Modoc43north_coast8,485
Lassen44sierra29,812
Plumas45sierra19,140
Sierra46sierra3,198
Amador47sierra40,891
Calaveras48sierra45,906
Tuolumne49sierra54,450
Mariposa50sierra17,118
Inyo51sierra18,949
Mono52sierra13,089
Alpine53sierra1,129
Butte54central_valley203,599
Colusa55central_valley22,074
Lake56north_coast67,407
Imperial57southern179,702
Merced58central_valley296,774
LegendWired & tested in productionScraper built, partial coverageNo public source / blockedNot yet evaluated

Hover any cell to see the upstream source URL and our latest notes. We publish this matrix because the legal disclosure is the same either way — the only thing that differs between providers is how transparent they are about the underlying data. Counties are ordered by transaction volume, so the rows at the top of the table represent the bulk of California escrows.

Coverage gap in your county?

If you're an agent or escrow officer who works in a county that still shows red or yellow, let us know — we prioritize coverage buildout by inbound demand.

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