Data Sources

All data in GreenLedger comes from official public records. Here are our sources with full methodology and data dictionaries.

Our Data Credibility Approach

Every figure in GreenLedger is traceable to an official source. Expand any source below to see its update frequency, measurement methodology, data field definitions, precision levels, and known limitations. Fields marked "direct" come straight from the source; "derived" fields are calculated or editorially assigned by GreenLedger.

City of Cerritos Combined Financial Program FY 2025-2026 (Adopted Budget)

Current

The officially adopted annual budget for the City of Cerritos, a 370+ page document detailing all revenue sources, departmental expenditures, capital improvements, and fund statements for the fiscal year beginning July 1, 2025.

Budget ExplorerTax Dollar CalculatorBudget SimulatorScorecardsChallenges

Accessed: 2025-06-27

City of Cerritos FY 2025-26 Budget at a Glance

Current

One-page infographic summarizing FY 2025-26 citywide operating expenses ($131.4M), General Fund revenue ($101.5M), and capital improvement plan ($23.0M).

Home Page StatsBudget Explorer

Accessed: 2025-06-27

Cerritos OpenGov Financial Transparency Portal

Current

Interactive portal providing 10-year historical expenditure and revenue data by department and fund. Data spans FY 2016-17 through FY 2025-26 (Adopted).

10-Year Historical TrendsBudget Explorer

Accessed: 2025-06-27

City of Cerritos Combined Financial Program FY 2024-2025 (Adopted Budget)

Recent

Prior year adopted budget used for year-over-year comparison and trend analysis.

Budget ExplorerTrend Data

Accessed: 2025-06-27

City of Cerritos — Current Green Efforts

Current

Official city sustainability page listing active environmental programs including recycled water, solar energy, CNG fleet, LED traffic signals, and urban forestry.

ScorecardsChallengesSustainability Metrics

Accessed: 2025-06-27

City of Cerritos — Recycled Water Program

Current

Details on Cerritos's recycled water system operating since 1988: 25 miles of distribution lines, 200+ acres irrigated, 722 million gallons of potable water conserved annually.

Water Conservation ScorecardChallenges

Accessed: 2025-06-27

U.S. Census Bureau — Cerritos City, California

Recent

Population estimates and demographic data for per-capita calculations. Cerritos population: 51,460 (2020 Census).

Per-Capita CalculationsDemographicsTax Dollar Calculator

Accessed: 2024-11-15

City of Cerritos Strategic Plan 2025-2027

Current

City Council adopted strategic plan outlining 7 goals for city operations, including Goal 5 (Technology), Goal 6 (Fiscal Transparency & Sustainability), and Goal 7 (Community Communications).

Strategic Plan Alignment

Accessed: 2025-12-12

Metropolitan Water District of Southern California — Rates & Charges

Current

MWD wholesale water rates used as benchmark for recycled water cost savings calculations. Tier 1 treated water rate approximately $0.005/gallon.

Water Finance ModuleImpact ROI Benchmarks

Accessed: 2025-06-27

California Air Resources Board — GHG Emission Inventory

Current

CARB grid emissions factor for California electricity: 622 lbs CO2e per MWh. Used for energy literacy emissions calculations and renewable energy scenario modeling.

Energy Literacy ModuleEmissions Calculations

Accessed: 2025-06-27

Athens Services — Cerritos Residential Collection

Current

Athens Services operates Cerritos residential waste collection with a 3-cart system (blue recycling, green organics, black landfill). All waste vehicles are CNG-operated. Used for recycling quiz content and SB 1383 education.

Recycling QuizWaste Challenges

Accessed: 2025-06-27

EPA eGRID — Emissions & Generation Resource Integrated Database

Current

National average grid emissions factor: 852 lbs CO2e per MWh. Used alongside CARB data for California vs. national emissions comparison in energy literacy module.

Energy Literacy ModuleEmissions Comparisons

Accessed: 2025-06-27