7fa0ed1c77
- Updated wastewater surveillance data (334,229 samples) - Added interactive dashboard visualizing COVID-19, Flu, and RSV trends - 12-month trend analysis (Nov 2024 - Nov 2025) - Current status: COVID 21.7k (↓38.5%), Flu 2.6k (↓11.2%), RSV 3.3k (↑30.5%) - Overall risk assessment: LOW across all pathogens - Dashboard features: D3.js charts, hover tooltips, responsive design 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
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Dataset Update Log
This file tracks all updates to the Bay Area COVID-19 Wastewater Surveillance dataset.
Update Format
Each entry should include:
- Date: When the update was made
- Data Period: Which time period the new data covers
- Source: URL or reference to the data source
- Changes: What was added, modified, or corrected
- Latest Value: Most recent data point added
2025-10-07 - Initial Dataset Creation
Data Period: 2022-07-09 to 2025-08-02 Source: CDPH California Wastewater Surveillance URL: https://data.chhs.ca.gov/dataset/1184f641-313f-47ee-b126-9e8c42699be5/resource/726752d3-afe6-4733-99bd-ffb9f400348c/download/wastewater.csv
Changes
- Created initial dataset with 161 weekly data points
- Downloaded raw California statewide wastewater data from CDPH
- Processed data:
- Converted dates from MM/DD/YYYY to ISO 8601 format (YYYY-MM-DD)
- Rounded viral concentration values to 2 decimal places
- Added data_source and region columns for clarity
- Added notes column specifying units (Log10 viral gene copies/mL)
Latest Value
- Week Ending: 2025-08-02
- SARS-CoV-2: 5.60 log10 copies/mL
- Trend: Elevated, increasing from summer lows
- Status: HIGH wastewater activity in California
Coverage
- Start Date: 2022-07-09 (earliest available data)
- End Date: 2025-08-02 (most recent data)
- Total Records: 161 weekly measurements
- Completeness: 100% (no gaps)
Files Created
COVID-Wastewater-California-Statewide-2022-2025.csv(main dataset)COVID-Wastewater-SF-Bay-Area-2023-2025.md(metadata documentation)README.md(dataset documentation)UPDATES.md(this file)
Data Quality Notes
- All 161 weeks have complete data
- No missing values or gaps in time series
- Data validates against CDC NWSS for consistency
- Peak value: 18.97 log10 (2022-07-09, early Omicron period)
- Low value: 1.60 log10 (2025-03-15, spring trough)
2025-10-14 - Automated Data Update
Data Period: 2022-07-09 to 2022-07-09 Source: CDPH California Wastewater Surveillance URL: https://data.chhs.ca.gov/dataset/1184f641-313f-47ee-b126-9e8c42699be5/resource/726752d3-afe6-4733-99bd-ffb9f400348c/download/wastewater.csv
Changes
- Updated dataset with latest wastewater measurements
- Total records: 161
Latest Value
- Week Ending: Jul 8, 2022
- SARS-CoV-2: 18.97 log10 copies/mL
2025-11-12 - Automated Data Update
Data Period: 2022-07-09 to 2022-07-09 Source: CDPH California Wastewater Surveillance URL: https://data.chhs.ca.gov/dataset/1184f641-313f-47ee-b126-9e8c42699be5/resource/726752d3-afe6-4733-99bd-ffb9f400348c/download/wastewater.csv
Changes
- Updated dataset with latest wastewater measurements
- Total records: 161
Latest Value
- Week Ending: Jul 8, 2022
- SARS-CoV-2: 18.97 log10 copies/mL
2025-11-21 - Multi-Pathogen Surveillance Update + Interactive Dashboard
Data Period: Nov 2024 to Nov 2025 (12-month rolling window) Source: CDPH California Wastewater Surveillance via CHHS Open Data Portal URL: https://data.chhs.ca.gov/dataset/wastewater-surveillance-data-california
Changes
- Updated California-Wastewater-Surveillance-Latest.csv with 334,229 total samples
- Added multi-pathogen tracking: COVID-19, Influenza A, RSV, Mpox, Norovirus
- Created interactive D3.js dashboard for data visualization
- Added 12-month trend analysis with monthly averages
Latest Values (November 2025)
- COVID-19: 21.7k copies/g (⬇️ 38.5% vs Oct) - LOW RISK
- Influenza A: 2.6k copies/g (⬇️ 11.2% vs Oct)
- RSV: 3.3k copies/g (⬆️ 30.5% vs Oct)
Trend Highlights
- COVID summer 2025 surge (Aug peak: 213.5k) has resolved
- Influenza seasonal decline from Jan 2025 peak (92.3k)
- RSV beginning seasonal uptick entering winter
- Overall risk assessment: LOW across all pathogens
Files Added
dashboard.html(interactive D3.js visualization)California-Wastewater-Surveillance-Latest.csv(updated)
Coverage
- Total Samples: 334,229 wastewater measurements
- Pathogens: SARS-CoV-2, Influenza A & B, RSV, Mpox, Norovirus
- Geographic Coverage: All California wastewater treatment plants
- Update Frequency: Daily from CDPH
Future Updates
New updates will be added above this line in reverse chronological order (newest first).