Table 1.
Descriptions of wastewater sampling locations including associated wastewater utility, clinical testing data sources, population, and flow rates. “d” represents the number of unique dates on which samples were collected. “n” represents the total number of wastewater samples collected, including extraction replicates.
| Wastewater catchment area | Wastewater treatment facility | COVID-19 clinical data source | Population | Mean flow rate (MGD) | Mean per capita flow (L/person/day) | d | n |
| Location K Influent to the wastewater treatment facility | Central Contra Costa Sanitary District | Contra Costa County Public Health Department | 483,600 | 33 | 261 | 13 | 39 |
| Location S Upstream of wastewater treatment facility | East Bay Municipal Utility District | Alameda County Public Health Department | 469,344 | 35 | 282 | 20 | 22 |
| Location A Upstream of wastewater treatment facility | East Bay Municipal Utility District | Alameda County Public Health Department | 82,818 | 6 | 274 | 11 | 17 |
| Location N Upstream of wastewater treatment facility | East Bay Municipal Utility District | Contra Costa County and Alameda County Public Health Departments | 139,037 | 10 | 272 | 18 | 18 |
| Location Q* Wastewater collection point for San Quentin Prison | Central Marin Sanitation Agency | California Department of Corrections and Rehabilitation open data portal | Ranges from 3,587 (June) to 2,930 (September) | 0.41 | 481 | 10 | 11 |
| Location E Influent to the wastewater treatment facility | San Jose - Santa Clara Regional Wastewater Facility (SJSC-RWF) | Not applicable | 1,500,000 | 103 | 278 | 19 | 48 |
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For location Q, the population and clinical data are from incarcerated people only and do not include staff.