HomeMy WebLinkAboutItem No. 11 PPP 02-09-2022 Administration Committee - COVID Sewer Surveillance Update v22/9/2022
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Update on OC San’s COVID‐19
Sewage Surveillance Efforts
Samuel Choi, Lab
and Ocean
Monitoring
Manager, ESD
Prepared for
Administration Committee
2/9/2022
•Introduction to sewage surveillance
•OC San, SWRCB/CDPH, and CDC efforts
•Next steps
•Acknowledgement
Presentation
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What is sewage surveillance (WBE)?
•Measure microbiological markers in wastewater
•Community‐level infection
•Augment clinical surveillance
•Inform on public health interventions
How is it used during COVID‐19?
•SARS‐CoV‐2 markers shed in feces (symptomatic/asymptomatic)
•Early and unbiased indicator of changes in community infection
•Variant detection
Sewage Surveillance
Early Days –A lot of Unknowns
9 days later, in a
follow-up article
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Wait or Innovate?
Lessons from prior wastewater surveillance efforts
Obtain expert advice
Establish current and future use cases
Sustainable field and laboratory resources
Criteria for collaboration
OC San Efforts
•Started with 4 partners and narrowed down to lab that met our needs
•Current partnership with CDPH and SWRCB to support CDC NWSS
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California and National Efforts
•California NWSS
•Part of CDC’s NWSS
•Began 12/2020 with 5 largest
wastewater agencies
•Currently includes 22 agencies
•Monitor sewage for SARS‐CoV‐2
marker and variants
•Data transmitted to CDC NWSS portal
OC San Sewage Surveillance
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OC
Sa
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Se
r
v
i
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Ar
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a
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w
Ca
s
e
s
(7
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)
Co
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i
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Ma
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r
Co
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c
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n
t
r
a
t
i
o
n
(m
i
l
l
i
o
n
s
of
SA
R
S
‐Co
V
‐2 RN
A
ge
n
e
co
p
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s
pe
r
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r
)
Coronavirus in Sewage at OC San Plant 1 (Data through 1/24/2022)
New Cases (7‐day average) ‐ OC San Service Area
Coronavirus Concentration (DPR‐2)
Coronavirus Concentration (SCCWRP)
Coronavirus Concentration (ZYMO)
Notes: For recent dates, new case numbers are preliminary. Non‐detect results are not shown on graph.
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OC San Sewage Surveillance
0
1000
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9000
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15
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OC
Sa
n
Se
r
v
i
c
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Ar
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a
‐
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w
Ca
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s
(7
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)
Co
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Ma
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Co
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(m
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s
of SA
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V
‐2 RN
A
ge
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e
co
p
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s
pe
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)
Coronavirus in Sewage at OC San Plant 1 (Data through 1/24/2022)
New Cases (7‐day average) ‐
OC San Service Area
Coronavirus Concentration
(ZYMO)
Notes: For recent dates, new case numbers are preliminary. Non‐detect results are not shown on graph.
Past 2 months
•Last 10 days: decreasing
•Levels lower vs. 2 weeks ago
•Levels lower vs. 4 weeks ago
4 we
e
k
s
ag
o
2 we
e
k
s
ag
o
10‐Day
Trend
Looking Ahead
• Continue to partner with CDPH and SWRCB to
support CDC NWSS
• Test sewage 3x/week through December 2022
• Continue surveillance and add variant monitoring
OC San CDPH /
SWRCB
CDC
NWSS
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This Photoby Unknown Author is licensed
under CC BY‐NC
Statewide Recognition for OC San
CDC Public Dashboard
https://covid.cdc.gov/covid‐data‐tracker
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•Margil Jimenez –Scientist
•Jennifer Cabral –PAO Manager
•Management
•Partners
Acknowledgements
Questions
?
Samuel Choi
schoi@ocsan.gov
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