Source Registry

Named source products, bound to the current release.

Every metric is tied to a source product, vintage, access method, license, and operational note. California UCRI is the single current public model, and CalEnviroScreen 5.0 supplies environmental burden.

Download and cite the current model record

The source sheet, model registry, methodology summary, and citation block are available directly from this page.

Download source registry CSV Open model registry JSON Download methodology PDF

registered source and processing records

2020-2026

source vintages in the current model record

July 2026

current published release

Current and used in UCRI

California UCRI source registry

UCRI = 0.25 CDS + 0.25 HES + 0.15 ISS + 0.20 SVS + 0.15 EBS

Component	Environmental burden
Current source	CalEnviroScreen 5.0 Pollution Burden percentile
Source release	July 1, 2026
Status	Current and used in UCRI

Data provenance | California UCRI current release

Named sources | versioned model

Every displayed model value follows this registered path. CalEnviroScreen 5.0 supplies the current Environmental Burden Score.

California UCRI | source vintage timeline

2020 to 2026

Hover markers to decode vintages. Each input keeps its own observation year; nothing is silently refreshed.

bundledlow risk

Tract boundaries

TIGER/Line Census Tracts

Documentation Source access

Model role: Supporting geometry and processing, not a weighted component.

Version

2020

Vintage

2020

Resolution

vector

Units

polygon

License

Public domain (US Census)

Cost

Free

Updates

Decennial with boundary refreshes

Historical data

Yes, but crosswalks are required across boundary changes.

Processing path

Download county tract boundaries, normalize GEOID, and use GEOID as the join key.

Model note

Canonical 2020 census tract GEOID for the current California UCRI release.

bundledlow risk

Tree canopy

NLCD 2021 Tree Canopy Cover

Documentation Source access

25%

Role in California UCRI

Canopy Deficit Score (CDS)

Inverted to a deficit; less canopy raises the component score.

Version

v2021-4

Vintage

2021

Resolution

30 m raster

Units

percent

License

Public domain (USGS / USFS)

Cost

Free for the source data

Updates

Annual NLCD is planned annually; legacy NLCD has fixed historical epochs.

Historical data

Yes. Legacy epochs include 2013 and 2016; Annual NLCD supports long time series where available.

Processing path

Use GEE zonal means by tract, then export tract-year canopy percent.

Model note

Summarized by 2020 tract using zonal means.

bundledlow risk

Land surface temperature

Landsat 8/9 Collection 2 Level 2 ST_B10 summer mosaic

Documentation Source access

25%

Role in California UCRI

Heat Exposure Score (HES)

Mean summer land-surface temperature drives the component score.

Version

Collection 2 Level 2

Vintage

2023

Resolution

100 m native, delivered at 30 m

Units

degrees Fahrenheit

License

Public domain (USGS)

Cost

Free for the source data

Updates

Scene-level updates with processing lag; seasonal composites should be rebuilt on schedule.

Historical data

Excellent. Landsat archive reaches back decades; Landsat 8 supports 2013 onward.

Processing path

Cloud-mask summer scenes, scale ST_B10 to land-surface temperature, summarize by tract.

Model note

Cloud-screened summer 2023 scenes, scaled to surface temperature.

bundledlow risk

Impervious surface

NLCD 2021 Impervious Surface

Documentation Source access

15%

Role in California UCRI

Impervious Surface Score (ISS)

Built and sealed surface share supplies the impervious component.

Version

v2021-4

Vintage

2021

Resolution

30 m raster

Units

percent

License

Public domain (USGS)

Cost

Free for the source data

Updates

Annual NLCD is planned annually; legacy NLCD has fixed historical epochs.

Historical data

Yes. Legacy epochs include 2013 and 2016; Annual NLCD supports long time series where available.

Processing path

Use GEE zonal means by tract, then export tract-year impervious percent.

Model note

Summarized by 2020 tract using zonal means.

bundledmedium risk

Social vulnerability

CDC/ATSDR SVI

Documentation Source access

20%

Role in California UCRI

Social Vulnerability Score (SVS)

CDC/ATSDR SVI supplies the social-vulnerability component.

Version

2022

Vintage

2022

Resolution

tract

Units

percentile

License

Public domain (US government)

Cost

Free

Updates

Every few years when CDC/ATSDR publishes a new SVI release.

Historical data

Yes, but CDC cautions that versions are not directly comparable across years.

Processing path

Download state CSV, validate fields, join by GEOID, and keep version-specific notes.

Model note

RPL_THEMES used; missing flags are excluded from scoring.

bundledmedium risk

Environmental burden

CalEnviroScreen 5.0 Pollution Burden percentile

Documentation Source access

15%

Role in California UCRI

Environmental Burden Score (EBS)

The official CalEnviroScreen 5.0 Pollution Burden percentile supplies EBS.

Version

5.0, released July 1, 2026

Vintage

2026

Resolution

tract

Units

percentile

License

California Open Data

Cost

Free

Updates

Versioned OEHHA release; CalEnviroScreen 5.0 was released July 1, 2026.

Historical data

Limited. Version history exists, but indicators and tract vintages change.

Processing path

Download the official CSV, verify its SHA-256 checksum, validate unique tract identifiers, and join PollutionP directly to 2020 California tract GEOIDs.

Model note

The official PollutionP statewide percentile supplies EBS in the current release.

live check readymedium-high risk

Processing engine

Google Earth Engine

Documentation Source access

Model role: Supporting geometry and processing, not a weighted component.

Version

Cloud project registration required

Vintage

2026

Resolution

server-side geospatial computation

Units

pipeline runtime

License

Platform terms apply

Cost

Free only for eligible noncommercial/research use; commercial or government operational use can require a paid commercial account.

Updates

On demand or scheduled

Historical data

Hosts and processes many historical raster products.

Processing path

Run tract-year zonal statistics jobs, export CSV/JSON, then ingest into Canopulse.

Model note

This is the recommended heavy processing layer, but commercial terms must be reviewed before paid Canopulse use.

Previous environmental-burden releases are retained only for reproducibility. Open the Technical Archive.

Machine-readable provenance is available.

Use the source endpoint for automated QA, documentation, and pipeline checks.

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