Recorded parcel geography, only showing active parcels, with date recorded parcel was added, date recorded parcel was dropped/retired, date was added, dropped or altered re map layer. Contains geography created since the inception of the basemap in 1995, with some exceptions. Zoning District columns reflect current zoning.This data has been filtered to only include active parcels. Data pushed to ArcGIS Online on October 10, 2025 at 5:19 AM by SFGIS.Data from: https://data.sfgov.org/d/acdm-wktnDescription of dataset columns:

 mapblklot
 For parcels that are condominium lots and share the same 2D space, this is the lowest value Assessor Parcel Number in the set.


 blklot
 Unique Assessor Parcel Number, combination of the Block Number and the Lot Number


 block_num
 Assessor Block Number


 lot_num
 Assessor Lot Number


 from_address_num
 From Address Number, i.e., the lowest address house number


 to_address_num
 To Address Number, i.e., the highest address house number


 street_name
 Street Name


 street_type
 Street Type, or suffix (e.g., ST, BLVD, etc.)


 odd_even
 Odd or Even Address Number Range


 in_asr_secured_roll
 Indicates the record is in the current Assessor Secured Roll


 pw_recorded_map
 Indicates the record is part of the current Public Works basemap dataset, based on recorded map information.


 zoning_code
 Zoning Code - based on City Planning data


 zoning_district
 Zoning District Name - based on City Planning data


 date_rec_add
 This is the date that the documents related the to addition of the parcel was recorded, as tracked by Public Works.


 date_rec_drop
 This is the date that the documents related the to dropping/retiring of the parcel was recorded, as tracked by Public Works.


 date_map_add
 This is the date that Public Works adding the parcel geography.


 date_map_drop
 This is the date that Public Works dropped the parcel geography.


 date_map_alt
 This is the date that Public Works altered the parcel geography.


 project_id_add
 This is the project identifier for the Public Works project related to the addition of the parcel.


 project_id_drop
 This is the project identifier for the Public Works project related to the dropping/retiring of the parcel.


 project_id_alt
 This is the project identifier for the Public Works project related to the altering of the parcel.


 active



 shape
 The geometry, multipolygon format


 centroid_latitude
 The centroid latitude of the parcel


 centroid_longitude
 The centroid longitude of the parcel


 supdist
 Full name of Supervisorial District.


 supervisor_district
 Supervisor District Number


 supdistpad
 Supervisor District Number with zero padding (01,02,...)


 numbertext
 Supervisor District Number as text (ONE, TWO, ...)


 supname
 Name of current Supervisor of District.


 analysis_neighborhood
 San Francisco Neighborhood for analysis, per DataSF.


 police_district
 The corresponding SFPD district.


 police_company
 The corresponding SFPD district company.


 planning_district
 These are grouping of census tracts. Planning Districts are used in various areas of the Planning process, mainly for analysis and management but are also in some parts of the General Plan.


 planning_district_number
 The number corresponding Planning District field.


 data_as_of
 Timestamp the data was last updated in the source system


 data_loaded_at
 Timestamp the data was loaded to the open data portal

Note: If no description was provided by DataSF, the cell is left blank. See the source data for more information.

PDF maps of each block in San Francisco created by the San Francisco Office of the Assessor-Recorder. The maps display blocks and parcels with dimensions in feet.

Zoning Districts City and County of San Francisco Planning Department. The Zoning Districts are the main component of the Zoning Map. The Zoning Map comprises: - Zoning Districts - Height and Bulk Districts - Special Use Districts - Preservation Districts - Coastal Zone Area - Special Sign Districts The official Zoning Map can be found in the San Francisco Planning Code: http://library.municode.com/index.aspx?clientId=14145&stateId=5&stateName=California (click on the links under ZONING MAPS on the left navigation column). Summaries of the Zoning District codes can be found here: http://www.sf-planning.org/index.aspx?page=1580 Section 105 of the Planning Code states: "The designations, locations and boundaries of the districts established by this Code shall be shown upon the "Zoning Map of the City and County of San Francisco," which shall consist of a series of numbered sectional maps. Wherever any uncertainty exists as to the boundary of any district as shown on said sectional maps, the following rules shall apply: (a) Where boundary lines are indicated as following streets and alleys within the right-of-way, they shall be construed as following the centerlines of such streets and alleys; (b) Where boundary lines are indicated as approximately following lot lines, such lot lines shall be construed to be such boundaries; (c) Where a boundary line divides a lot or crosses unsubdivided property; the location of such boundary shall be as indicated upon the Zoning Map using the scale appearing on such map; (d) Where further uncertainty exists, the City Planning Commission upon written application, or on its own motion, shall by resolution determine the location of a disputed boundary giving due consideration to the apparent indicated location thereof and the scale of the Zoning Map and the express purposes of this Code; (e) Wherever any property is not under these rules specifically included in any use district shown on the Zoning Map, such property is hereby declared to be in an RH-1(D) District, except that all property owned on the effective date of this amendment by the United States of America, State of California, City and County of San Francisco, or other governmental agency and within the City and County of San Francisco but not within the area covered by Sectional Maps Nos. 1 through 13 of the Zoning Map is hereby declared to be in a P (Public Use) District unless reclassified in accordance with the provisions of this Code; (f) Wherever any property is not under these rules specifically included in any height and bulk district shown on the Zoning Map, such property is hereby declared to be in a 40-X height and bulk district, except that all property owned on the effective date of this amendment by the United States of America, State of California, City and County of San Francisco, or other governmental agency and within the City and County of San Francisco but not within the area covered by Sectional Maps Nos. 1H through 13H of the Zoning Map is hereby declared to be in an OS (Open Space) District unless reclassified in accordance with the provisions of this Code, with the exception of Yerba Buena Island and Treasure Island which are hereby declared to be in a 40-X height and bulk district."Updated quarterly.

As of November 2023, this map has been updated to use a new format. For details, please see here.
Note: Due to the large file size the Shapefile export option does not work. To access geospatial data please select GeoJSON from the export menu

This data set includes the Office of the Assessor-Recorder’s secured property tax roll spanning from July 1, 2007 to June 30, 2023. It includes all legally disclosable information, including location of property, value of property, the unique property identifier, and specific property characteristics. The data is used to accurately and fairly appraise all taxable property in the City and County of San Francisco. The Office of the Assessor-Recorder makes no representation or warranty that the information provided is accurate and/or has no errors or omissions.

This dataset is updated annually after the roll is closed and certified. This typically happens by August of each year.

A. SUMMARY This dataset delineates parcels with “Taxable Commercial Space” - meaning parcels where one or more property owner(s) and/or commercial tenant(s) are required to file or pay the Commercial Vacancy Tax. The dataset includes the Block, Lot, Parcel Number and Parcel Situs Address for each commercial parcel within the named Districts. Information about each filing received for the parcel is included, such as Filer Type (Owner / Tenant), Filer Name, Parcel Situs Address from the Filing, and Tax Year filed. The dataset also includes whether a parcel is vacant, and if so, the tax rate applied. A single parcel may have multiple addresses and/or filings depending on the number of units and access points. Parcels marked as vacant either reported as vacant in the tax filing or were determined to be vacant by the Tax Collector. All information displayed is subject to audit by the Tax Collector. If you are a taxpayer and need to update the information displayed, you should re-file https://sftreasurer.org/CommercialVacancy or contact the Tax Collector for assistance. If you wish to share information about a vacant property subject to the Commercial Vacancy Tax with the Tax Collector to assist with enforcement, visit https://sftreasurer.org/report-vacant-commercial-property B. HOW THE DATASET IS CREATED This dataset delineates parcels with “Taxable Commercial Space” - meaning parcels where one or more property owner(s) and/or commercial tenant(s) are required to file or pay the Commercial Vacancy Tax. The dataset includes the Block, Lot, Parcel Number and Parcel Situs Address for each commercial parcel within the named Districts. Information about each filing received for the parcel is included, such as Filer Type (Owner / Tenant), Filer Name, Parcel Situs Address from Filing, Tax Year filed, whether the filer reported a vacancy, and if so, the tax rate applied. A single parcel may have multiple addresses and/or filings depending on the number of units and access points. The information displayed is reported by the taxpayers and subject to audit by the Tax Collector. C. UPDATE PROCESS Data will be refreshed daily until further notice. D. HOW TO USE THIS DATASET The Commercial Vacancy Tax dataset provides detailed information on commercial properties in San Francisco’s designated Neighborhood Commercial Districts and Neighborhood Commercial Transit Districts that are subject to the Commercial Vacancy Tax. This dataset includes key identifiers such as Block, Lot, Parcel Number, and Situs Address for each commercial parcel. It also lists information for each filing received from property owners, and tenants, including whether the filer reported a space as vacant and, if so, the applicable tax rate. Users can utilize this dataset to identify vacant commercial spaces and assess tax compliance. E. RELATED DATASETS Registered business _location – San Francisco San Francisco Property Information Map Assessor Block Maps F. KNOWN USES The Commercial Vacancy Tax dataset is primarily used by the San Francisco Office of the Treasurer & Tax Collector to monitor compliance with the city’s Commercial Vacancy Tax ordinance. It supports enforcement by identifying Commercial Space that may be subject to the tax and verifying reported vacancy status. Additionally, researchers, journalists, and community organizations access the data to study the impacts of vacant storefronts.

Comprehensive Airport Land Use Compatibility Plan for the Environs of San Francisco International Airport, 2012

Map 1 Current Land Use San Francisco
This dataset falls under the category Traffic Generating Parameters Land Cover.
It contains the following data: PPOT SAN FRANCISCO
This dataset was scouted on 2022-02-23 as part of a data sourcing project conducted by TUMI. License information might be outdated: Check original source for current licensing. The data can be accessed using the following URL / API Endpoint: https://dpu.mupa.gob.pa/wp-content/uploads/2017/06/PPOTSF_F1_01_Mapa_Usos-actual-del-suelo.pdfSee URL for data access and license information.

This report is a digital database package containing both plotfiles and Geographic Information Systems (GIS) databases of shaded relief maps of the San Francisco Bay Region. The data are provided for both the entire region and each county within the region, in two formats. The data is provided as ARC/INFO (Environmental Systems Research Institute, Redlands, CA) GRIDs for use in GIS packages, and as PostScript plotfiles of formatted maps similar to traditional U.S. Geological Survey map products.

[Summary provided by the USGS.]

Recorded parcel geography, only showing active parcels, with date recorded parcel was added, date recorded parcel was dropped/retired, date was added, dropped or altered re map layer. Contains geography created since the inception of the basemap in 1995, with some exceptions. Zoning District columns reflect current zoning.This data has been filtered to only include active parcels. Data pushed to ArcGIS Online on October 10, 2025 at 5:19 AM by SFGIS.Data from: https://data.sfgov.org/d/acdm-wktnDescription of dataset columns:

 mapblklot
 For parcels that are condominium lots and share the same 2D space, this is the lowest value Assessor Parcel Number in the set.


 blklot
 Unique Assessor Parcel Number, combination of the Block Number and the Lot Number


 block_num
 Assessor Block Number


 lot_num
 Assessor Lot Number


 from_address_num
 From Address Number, i.e., the lowest address house number


 to_address_num
 To Address Number, i.e., the highest address house number


 street_name
 Street Name


 street_type
 Street Type, or suffix (e.g., ST, BLVD, etc.)


 odd_even
 Odd or Even Address Number Range


 in_asr_secured_roll
 Indicates the record is in the current Assessor Secured Roll


 pw_recorded_map
 Indicates the record is part of the current Public Works basemap dataset, based on recorded map information.


 zoning_code
 Zoning Code - based on City Planning data


 zoning_district
 Zoning District Name - based on City Planning data


 date_rec_add
 This is the date that the documents related the to addition of the parcel was recorded, as tracked by Public Works.


 date_rec_drop
 This is the date that the documents related the to dropping/retiring of the parcel was recorded, as tracked by Public Works.


 date_map_add
 This is the date that Public Works adding the parcel geography.


 date_map_drop
 This is the date that Public Works dropped the parcel geography.


 date_map_alt
 This is the date that Public Works altered the parcel geography.


 project_id_add
 This is the project identifier for the Public Works project related to the addition of the parcel.


 project_id_drop
 This is the project identifier for the Public Works project related to the dropping/retiring of the parcel.


 project_id_alt
 This is the project identifier for the Public Works project related to the altering of the parcel.


 active



 shape
 The geometry, multipolygon format


 centroid_latitude
 The centroid latitude of the parcel


 centroid_longitude
 The centroid longitude of the parcel


 supdist
 Full name of Supervisorial District.


 supervisor_district
 Supervisor District Number


 supdistpad
 Supervisor District Number with zero padding (01,02,...)


 numbertext
 Supervisor District Number as text (ONE, TWO, ...)


 supname
 Name of current Supervisor of District.


 analysis_neighborhood
 San Francisco Neighborhood for analysis, per DataSF.


 police_district
 The corresponding SFPD district.


 police_company
 The corresponding SFPD district company.


 planning_district
 These are grouping of census tracts. Planning Districts are used in various areas of the Planning process, mainly for analysis and management but are also in some parts of the General Plan.


 planning_district_number
 The number corresponding Planning District field.


 data_as_of
 Timestamp the data was last updated in the source system


 data_loaded_at
 Timestamp the data was loaded to the open data portal

Note: If no description was provided by DataSF, the cell is left blank. See the source data for more information.

Please see Map of Land Use - 2023 for most recent data

Summary Land Use 2020: Land use categories for every parcel in San Francisco. The land use categories are derived from a range of City and commercial databases. Where building square footages were missing from these databases they were derived from a LIDAR survey flown in 2007.

Land use categories are as follows (units are square feet): - CIE = Cultural, Institutional, Educational - MED = Medical - MIPS = Office (Management, Information, Professional Services) - MIXED = Mixed Uses (Without Residential) - MIXRES = Mixed Uses (With Residential) - PDR = Industrial (Production, Distribution, Repair) - RETAIL/ENT = Retail, Entertainment - RESIDENT = Residential - VISITOR = Hotels/Motels - VACANT = Vacant - ROW = Right-of-Way - OPENSPACE = Open Space

Other attributes are: - RESUNITS = Residential Units - BLDGSQFT = Square footage data - YRBUILT = year built - TOTAL_USES = Business points from Dun & Bradstreet were spatially aggregated to the closest parcel, and this field is the sum of the square footage fields

The subsequent fields (CIE, MED, MIPS, RETAIL, PDER & VISITOR) were derived using the NAICS codes supplied in the Dun & Bradstreet dataset, and the previous TOTAL_USES column.

PREDOMINANT LAND USES: - RESIDENTIAL: Housing--from single family to multifamily to high-rise apartment complexes. - CIE - CULTURAL, INDUSTRIAL, EDUCATIONAL:Any cultural, institutional, medical or educational place such as a museum, zoo, hospital, medical center, college, theatre, social service, or membership organization. - MIPS (generally for offices):Management, information, and professional activities such as finance, insurance, and real estate (FIRE), business, legal, and public administration. - RETAIL/ENT(Retail/Entertainment)Shopping and direct consumer services, amusement, recreation and personal services, restaurants and bars -- from neighborhood-serving to region-serving. - PDR (Production/Distribution/Repair):Wholesale trade, showrooms, manufacturing and materials processing, warehousing, repair, businesses, construction, transportation, communications, utilities. - VISITOR:Hotels and motels.PUBLIC:Publicly owned parks, recreation, and open spaces, as well as some highway right of ways. - VACANT:An empty or undeveloped lot. - MIXED USES:Combined uses, such as office and retail, industrial-retail-entertainment, or industrial and office, etc. where no one use predominates. - MIXEDRES (Residential Mixed):Mostly housing with one or more other use (office, retail, industrial)on the ground floor).

The determining factor for a parcel's LANDUSE is if the square footage of any non-residential use is 80% or more of its total uses. Otherwise it becomes MIXED.

In the case where RESIDENT use has some square footage of non-residential use, this is mainly accessory uses such as home businesses, freelancers, etc.

A. SUMMARY This data represents the boundaries of City-owned lands maintained in the City's Facility System of Record (FSR).
Note: Not all lands are within the City and County proper. The City owns properties outside of its boundaries, including lands managed by SF Recreation and Parks, SF Public Utilities Commission, and other agencies.
Certain lands are managed by following agencies which are not directly part of the City and County of San Francisco, but are included here for reference: San Francisco Housing Authority (SFHA), San Francisco Office of Community Investment and Infrastructure (OCII), and City College of San Francisco.

B. HOW THE DATASET IS CREATED The Enterprise GIS program in the Department of Technology is the technical custodian of the FSR. This team creates and maintains this dataset in conjunction with the Real Estate Division and the Capital Planning Program of the City Administrator’s Office, who act as the primary business data stewards for this data.

C. UPDATE PROCESS There are a handful of events that may trigger changes to this dataset: 1. The sale of a property 2. The leasing of a property 3. The purchase of a property 4. The change in jurisdiction of a property (e.g. from MTA to DPW) 5. The removal or improvement of the property Each of these changes triggers a workflow that updates the FSR. The Real Estate Division and Capital Planning make updates on an ongoing basis. The full dataset is reviewed quarterly to ensure nothing is missing or needs to be corrected. Updates to the data, once approved, are immediately reflected in the internal system and are updated here in the open dataset on a monthly basis.

D. HOW TO USE THIS DATASET See here for an interactive map of all the City lands in this dataset. To track the facilities on City lands, join this dataset to the City Facilities dataset using the land_id field. If you see an error in the data, you can submit a change request with the relevant information to dtis.helpdesk@sfgov.org. Please be as specific about the error as you can (including relevant land_id(s)).

E. RELATED DATASETS City Facilities

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With a proven track record of building strong relationships with city agencies, MAP Strategies provides comprehensive guidance across all disciplines necessary for code compliance and permitting. The organization is headquartered in Chicago, with locations in Los Angeles, San Francisco, and Seattle, and has received various certifications, including Women Owned Business (WBE) status. By offering unparalleled concierge service and expert guidance, MAP Strategies has established itself as a premier partner for developers and construction professionals.

SUMMARY The Air Pollutant Exposure Zone (APEZ) map identifies areas in San Francisco where air modeling indicates higher levels of air pollution. This map is required to be updated every 5 years, as established in San Francisco Health Code article 38. The 2025 Air Pollutant Exposure Zone map is an update to the 2020 map. Additional information may be found at Air Quality Review | SF Planning. The map can be viewed on the San Francisco Property Information Map. HOW THE DATASET IS CREATED The 2025 APEZ update modeled areas of the city where: particulate matter (PM2.5) is greater than or equal to 9 µg/m3 or where the risk of cancer from air pollutants is greater than or equal to 100 in a million; in health vulnerable ZIP codes (94102, 94103, 94110, 94124, and 94134), where the risk of cancer from air pollutants is greater than or equal to 90 in a million; locations within 500 feet of freeways; or locations within 1,000 feet of roadways with a daily average of 100,000 vehicles. To learn more, visit San Francisco Citywide Health Risk Assessment: Technical Support Documentation, Air Pollutant Exposure Zone Handout and Air Pollutant Exposure Zone Story Map. UPDATE PROCESS Updated every five years. HOW TO USE THIS DATASET The City uses this dataset as follows. San Francisco Health Code article 38 requires new developments or major renovations within the APEZ with sensitive receptors, like housing or preschools, to include a ventilation system that sufficiently removes fine particulate matter (minimum efficiency reporting volume [MERV] 13 or equivalent filtration). In addition, Environment Code Chapter 25 requires public agencies implementing projects within the APEZ to use the cleanest construction equipment available. The City’s environmental review under the California Environmental Quality Act (CEQA) uses the APEZ in its analysis to mandate the use of clean construction equipment, when applicable. To learn more, visit Air Quality Review | SF Planning.

This dataset includes one file for each of the 51 counties that were collected, as well as a CA_Merged file with the parcels merged into a single file.Note – this data does not include attributes beyond the parcel ID number (PARNO) – that will be provided when available, most likely by the state of California.DownloadA 1.6 GB zipped file geodatabase is available for download - click here.DescriptionA geodatabase with parcel boundaries for 51 (out of 58) counties in the State of California. The original target was to collect data for the close of the 2013 fiscal year. As the collection progressed, it became clear that holding to that time standard was not practical. Out of expediency, the date requirement was relaxed, and the currently available dataset was collected for a majority of the counties. Most of these were distributed with minimal metadata.The table “ParcelInfo” includes the data that the data came into our possession, and our best estimate of the last time the parcel dataset was updated by the original source. Data sets listed as “Downloaded from” were downloaded from a publicly accessible web or FTP site from the county. Other data sets were provided directly to us by the county, though many of them may also be available for direct download. Â These data have been reprojected to California Albers NAD84, but have not been checked for topology, or aligned to county boundaries in any way. Tulare County’s dataset arrived with an undefined projection and was identified as being California State Plane NAD83 (US Feet) and was assigned by ICE as that projection prior to reprojection. Kings County’s dataset was delivered as individual shapefiles for each of the 50 assessor’s books maintained at the county. These were merged to a single feature class prior to importing to the database.The attribute tables were standardized and truncated to include only a PARNO (APN). The format of these fields has been left identical to the original dataset. The Data Interoperablity Extension ETL tool used in this process is included in the zip file. Where provided by the original data sources, metadata for the original data has been maintained. Please note that the attribute table structure changes were made at ICE, UC Davis, not at the original data sources.Parcel Source InformationCountyDateCollecDateCurrenNotesAlameda4/8/20142/13/2014Download from Alamenda CountyAlpine4/22/20141/26/2012Alpine County PlanningAmador5/21/20145/14/2014Amador County Transportation CommissionButte2/24/20141/6/2014Butte County Association of GovernmentsCalaveras5/13/2014Download from Calaveras County, exact date unknown, labelled 2013Contra Costa4/4/20144/4/2014Contra Costa Assessor’s OfficeDel Norte5/13/20145/8/2014Download from Del Norte CountyEl Dorado4/4/20144/3/2014El Dorado County AssessorFresno4/4/20144/4/2014Fresno County AssessorGlenn4/4/201410/13/2013Glenn County Public WorksHumboldt6/3/20144/25/2014Humbodt County AssessorImperial8/4/20147/18/2014Imperial County AssessorKern3/26/20143/16/2014Kern County AssessorKings4/21/20144/14/2014Kings CountyLake7/15/20147/19/2013Lake CountyLassen7/24/20147/24/2014Lassen CountyLos Angeles10/22/201410/9/2014Los Angeles CountyMadera7/28/2014Madera County, Date Current unclear likely 7/2014Marin5/13/20145/1/2014Marin County AssessorMendocino4/21/20143/27/2014Mendocino CountyMerced7/15/20141/16/2014Merced CountyMono4/7/20144/7/2014Mono CountyMonterey5/13/201410/31/2013Download from Monterey CountyNapa4/22/20144/22/2014Napa CountyNevada10/29/201410/26/2014Download from Nevada CountyOrange3/18/20143/18/2014Download from Orange CountyPlacer7/2/20147/2/2014Placer CountyRiverside3/17/20141/6/2014Download from Riverside CountySacramento4/2/20143/12/2014Sacramento CountySan Benito5/12/20144/30/2014San Benito CountySan Bernardino2/12/20142/12/2014Download from San Bernardino CountySan Diego4/18/20144/18/2014San Diego CountySan Francisco5/23/20145/23/2014Download from San Francisco CountySan Joaquin10/13/20147/1/2013San Joaquin County Fiscal year close dataSan Mateo2/12/20142/12/2014San Mateo CountySanta Barbara4/22/20149/17/2013Santa Barbara CountySanta Clara9/5/20143/24/2014Santa Clara County, Required a PRA requestSanta Cruz2/13/201411/13/2014Download from Santa Cruz CountyShasta4/23/20141/6/2014Download from Shasta CountySierra7/15/20141/20/2014Sierra CountySolano4/24/2014Download from Solano Couty, Boundaries appear to be from 2013Sonoma5/19/20144/3/2014Download from Sonoma CountyStanislaus4/23/20141/22/2014Download from Stanislaus CountySutter11/5/201410/14/2014Download from Sutter CountyTehama1/16/201512/9/2014Tehama CountyTrinity12/8/20141/20/2010Download from Trinity County, Note age of data 2010Tulare7/1/20146/24/2014Tulare CountyTuolumne5/13/201410/9/2013Download from Tuolumne CountyVentura11/4/20146/18/2014Download from Ventura CountyYolo11/4/20149/10/2014Download from Yolo CountyYuba11/12/201412/17/2013Download from Yuba County

This shapefile (polygon feature) contains the boundary of the July 1, 2022 100-Year Storm Flood Risk Zone, one of the layers of the July 1, 2022 100-Year Storm Flood Risk Map. Areas within this boundary are highly likely to experience “deep and contiguous” flooding during a 100-year storm. A 100-year storm is a storm that has a 1% chance of occurring in a given year. “Deep and contiguous flooding” means flooding at least 6-inches deep spanning an area at least the size of an average City block. The 100-Year Storm Flood Risk Zone does not provide the exact depth of flooding at a given location. It also does not show areas in the City that may experience shallower and/or more localized flooding in a 100-year storm. Finally, the 100-Year Storm Flood Risk Zone shows flood risk from storm runoff only. It does not consider flood risk in San Francisco from other causes such as shoreline overtopping and overland inundation from the San Francisco Bay or Pacific Ocean. In addition to the 100-Year Storm Flood Risk Zone, the 100-Year Storm Flood Risk Map shows: • “Areas not served by the Combined Sewer and Stormwater Collection System” - showing where data for rainfall driven storm runoff is not available, and where flood risk has not been analyzed. • “Historical Shoreline”, “Historical Creeks”, and “Historical Waterbodies” - historical hydrology layers to illustrate the general topography of low-lying areas in the City. The Horizontal Datum used for the GIS layers is “NAD_1983_2011_StatePlane_California_III_FIPS_0403_Ft_US.” Notes on Usage At a minimum, the 100-Year Storm Flood Risk Map is updated by the San Francisco Public Utilities Commission (SFPUC) on an annual basis on or before July 1 to account for any parcel review requests that remove properties from the Flood Zone. To confirm the latest version of the 100-Year Storm Flood Risk Map, check the SFPUC website at https://sfpuc.org/learning/emergency-preparedness/flood-maps to see if the map has been updated since the date of this shapefile or if there have been any parcel review determinations that identify parcels that are no longer part of the 100-Year Flood Risk Zone. The most recent official map, associated documentation, and list of parcels removed from the map from a parcel review process are available at https://sfpuc.org/learning/emergency-preparedness/flood-maps. Please be advised that the parcels listed are no longer considered to be within the 100-Year Flood Risk Zone as a result of the parcel review process. As of July 2022, this list is updated on an ongoing basis. Check the SFPUC website for any changes to this schedule. The boundaries of this zone align with San Francisco parcel boundaries. The user should confirm proper projection or use of the webmap at https://sfpuc.org/learning/emergency-preparedness/flood-maps to properly identify parcels within the flood zone.

These maps show, for emergency service managers in the San Francisco Bay region, the threshold rainfall that may be capable of triggering a level of debris-flow activity likely to threaten public safety. The maps are products of a continuing series of studies that began after a catastrophic storm on January 3-5, 1982 triggered 18,000 debris flows in the San Francisco Bay region, causing 25 deaths and $66 million in property damage. The threshold rainfall values were estimated by re-evaluating a previous empirical analysis of data from the 1982 storm, and other historical rainfall records, that normalized the rainfall intensity data by dividing by the mean annual precipitation (MAP) of the corresponding rain gage. The present analysis also takes into account the rainfall frequency, the mean annual number of days with non-zero rainfall (#RDs), thereby adjusting for the difference in rainfall frequency between windward-facing slopes where rainfall is orographically enhanced and leeward-facing slopes and valleys that lie within rain shadows where precipitation is reduced. The debris-flow threshold maps were created by digitally combining an existing regional map of mean annual precipitation, a newly compiled data set of #RDs from an analysis of long-term (20-40 years) records of daily rainfall for 33 rain gages in the region, and the re-normalized thresholds from the empirical analysis of historical storm data.

Snapshot of San Francisco Development Pipeline. Tracking of construction and entitlement activity based on data from Dept of Building Inspection's Permit Tracking and the Planning Department's Case Tracking enterprise databases, processed quarterly.