COVID in wastewater. Another late summer pickup www.cdc.gov/nwss/rv/COVI...
August 29, 2025 at 6:24 PM
COVID in wastewater. Another late summer pickup www.cdc.gov/nwss/rv/COVI...
Good news: the very low current levels of SARS-CoV-2 in wastewater, even in places where the new variants are prevalent (XFG, NB.1.8.1), suggest that any summer wave will be limited, not like previous ones
www.cdc.gov/nwss/rv/COVI...
www.cdc.gov/nwss/rv/COVI...
June 28, 2025 at 2:46 PM
Good news: the very low current levels of SARS-CoV-2 in wastewater, even in places where the new variants are prevalent (XFG, NB.1.8.1), suggest that any summer wave will be limited, not like previous ones
www.cdc.gov/nwss/rv/COVI...
www.cdc.gov/nwss/rv/COVI...
2/2
NWSS actively monitors diseases like:
💩COVID-19
💩Measles
💩Flu
💩RSV
💩HPAI
What does the communal poop pot have to say about your area? Tell us in the comments👇 www.cdc.gov/nwss/index.h...
NWSS actively monitors diseases like:
💩COVID-19
💩Measles
💩Flu
💩RSV
💩HPAI
What does the communal poop pot have to say about your area? Tell us in the comments👇 www.cdc.gov/nwss/index.h...
NWSS Wastewater Monitoring in the U.S.
U.S. wastewater monitoring, National Wastewater Surveillance System
www.cdc.gov
February 26, 2026 at 4:30 PM
2/2
NWSS actively monitors diseases like:
💩COVID-19
💩Measles
💩Flu
💩RSV
💩HPAI
What does the communal poop pot have to say about your area? Tell us in the comments👇 www.cdc.gov/nwss/index.h...
NWSS actively monitors diseases like:
💩COVID-19
💩Measles
💩Flu
💩RSV
💩HPAI
What does the communal poop pot have to say about your area? Tell us in the comments👇 www.cdc.gov/nwss/index.h...
This Covid surge is now higher than last summer's, and it's showing no signs of peaking yet www.cdc.gov/nwss/rv/COVI...
August 12, 2024 at 4:32 PM
This Covid surge is now higher than last summer's, and it's showing no signs of peaking yet www.cdc.gov/nwss/rv/COVI...
Flu, RSV, and Norovirus are all surging quickly at the moment, and Covid is seeing increases too according to wastewater readings from BiobotAnalytics, WastewaterSCAN, and NWSS. Be careful out there!
December 20, 2024 at 1:18 AM
Flu, RSV, and Norovirus are all surging quickly at the moment, and Covid is seeing increases too according to wastewater readings from BiobotAnalytics, WastewaterSCAN, and NWSS. Be careful out there!
Sources:
CDC - U.S. COVID wastewater levels
www.cdc.gov/nwss/rv/COVID19-nationaltrend.html
CDC - U.S. COVID wastewater map
www.cdc.gov/nwss/rv/COVID19-currentlevels.html
CDC - U.S. COVID wastewater levels
www.cdc.gov/nwss/rv/COVID19-nationaltrend.html
CDC - U.S. COVID wastewater map
www.cdc.gov/nwss/rv/COVID19-currentlevels.html
January 5, 2024 at 9:22 PM
Sources:
CDC - U.S. COVID wastewater levels
www.cdc.gov/nwss/rv/COVID19-nationaltrend.html
CDC - U.S. COVID wastewater map
www.cdc.gov/nwss/rv/COVID19-currentlevels.html
CDC - U.S. COVID wastewater levels
www.cdc.gov/nwss/rv/COVID19-nationaltrend.html
CDC - U.S. COVID wastewater map
www.cdc.gov/nwss/rv/COVID19-currentlevels.html
Another US wastewater detection of BA.3.2.2 (from CDC-NWSS surveillance)
This time from Austin on 11/19
The score:
Wastewater 2
Patient surveillance 0
This time from Austin on 11/19
The score:
Wastewater 2
Patient surveillance 0
December 3, 2025 at 5:40 PM
Another US wastewater detection of BA.3.2.2 (from CDC-NWSS surveillance)
This time from Austin on 11/19
The score:
Wastewater 2
Patient surveillance 0
This time from Austin on 11/19
The score:
Wastewater 2
Patient surveillance 0
Great to see the major upgrade in CDC wastewater dashboard tracking of SARS-CoV-2 by region, state, variants, and time cdc.gov/nwss/rv/COVI...
November 29, 2023 at 3:25 AM
Great to see the major upgrade in CDC wastewater dashboard tracking of SARS-CoV-2 by region, state, variants, and time cdc.gov/nwss/rv/COVI...
WastewaterSCAN suggests that we are at the lowest levels in years... but I am not confident in that claim without ED, NWSS or Biobot data for the few of weeks.
I do miss having 4 data sets to cross compare...
I do miss having 4 data sets to cross compare...
October 15, 2025 at 1:07 AM
WastewaterSCAN suggests that we are at the lowest levels in years... but I am not confident in that claim without ED, NWSS or Biobot data for the few of weeks.
I do miss having 4 data sets to cross compare...
I do miss having 4 data sets to cross compare...
COVID wastewater levels are very high in the majority of U.S. states
(Source: CDC cdc.gov/nwss/rv/COVI... )
(Source: CDC cdc.gov/nwss/rv/COVI... )
December 23, 2023 at 2:00 AM
COVID wastewater levels are very high in the majority of U.S. states
(Source: CDC cdc.gov/nwss/rv/COVI... )
(Source: CDC cdc.gov/nwss/rv/COVI... )
Today's CDC update confirms the validity of last week's reported spike in Minnesota. Levels are falling quickly but remain "Very High." 🙃
www.cdc.gov/nwss/rv/COVI...
THREAD 1 of 3
www.cdc.gov/nwss/rv/COVI...
THREAD 1 of 3
Breaking: The CDC reports SARS-CoV-2 levels *quadrupled* in Minnesota in the past week.
Using harmonized wastewater estimates, we project 1 in 12 people in Minnesota are actively infectious. This is equivalent to a 59% chance of exposure in a room of 10 people....
Using harmonized wastewater estimates, we project 1 in 12 people in Minnesota are actively infectious. This is equivalent to a 59% chance of exposure in a room of 10 people....
February 20, 2026 at 4:53 PM
Today's CDC update confirms the validity of last week's reported spike in Minnesota. Levels are falling quickly but remain "Very High." 🙃
www.cdc.gov/nwss/rv/COVI...
THREAD 1 of 3
www.cdc.gov/nwss/rv/COVI...
THREAD 1 of 3
Goodbye UssZzyzxprise. Hello ElectroZzyzx. I’ll miss the stickers
March 25, 2026 at 10:05 PM
Goodbye UssZzyzxprise. Hello ElectroZzyzx. I’ll miss the stickers
Just FYI we’re entering a summer Covid wave right now (especially western regions in the US); you can see it in the CDC wastewater plot here (and anecdotally a bunch of my friends are suddenly testing positive). www.cdc.gov/nwss/rv/COVI...
Wastewater COVID-19 National and Regional Trends
CDC’s National Wastewater Surveillance System, U.S. National trends
www.cdc.gov
June 27, 2024 at 3:21 PM
Just FYI we’re entering a summer Covid wave right now (especially western regions in the US); you can see it in the CDC wastewater plot here (and anecdotally a bunch of my friends are suddenly testing positive). www.cdc.gov/nwss/rv/COVI...
March 10th Update:
After a relatively low transmission winter, we had a long shoulder, but numbers are starting to trend further down. Still elevated in the Midwest and Northeast. NWSS & WWScan:
Estimates:
🔸325,000 new infections/day
🔸~1 in 200 currently infected
After a relatively low transmission winter, we had a long shoulder, but numbers are starting to trend further down. Still elevated in the Midwest and Northeast. NWSS & WWScan:
Estimates:
🔸325,000 new infections/day
🔸~1 in 200 currently infected
March 11, 2026 at 1:18 AM
March 10th Update:
After a relatively low transmission winter, we had a long shoulder, but numbers are starting to trend further down. Still elevated in the Midwest and Northeast. NWSS & WWScan:
Estimates:
🔸325,000 new infections/day
🔸~1 in 200 currently infected
After a relatively low transmission winter, we had a long shoulder, but numbers are starting to trend further down. Still elevated in the Midwest and Northeast. NWSS & WWScan:
Estimates:
🔸325,000 new infections/day
🔸~1 in 200 currently infected
April 10th Update:
Both NWSS and WWScan data sets suggest the lowest transmission levels in more than 4 years. BA.3.2 (Cicada) modestly impacting primarily the under 18 group.
Estimates:
🔸118,000 new infections/day
🔸~1 in 550 currently reasonably infectious (5 day window)
Both NWSS and WWScan data sets suggest the lowest transmission levels in more than 4 years. BA.3.2 (Cicada) modestly impacting primarily the under 18 group.
Estimates:
🔸118,000 new infections/day
🔸~1 in 550 currently reasonably infectious (5 day window)
April 10, 2026 at 11:28 PM
April 10th Update:
Both NWSS and WWScan data sets suggest the lowest transmission levels in more than 4 years. BA.3.2 (Cicada) modestly impacting primarily the under 18 group.
Estimates:
🔸118,000 new infections/day
🔸~1 in 550 currently reasonably infectious (5 day window)
Both NWSS and WWScan data sets suggest the lowest transmission levels in more than 4 years. BA.3.2 (Cicada) modestly impacting primarily the under 18 group.
Estimates:
🔸118,000 new infections/day
🔸~1 in 550 currently reasonably infectious (5 day window)
To note, here are some other current trends that do show a slower rise than NWSS. (WWscan, Emergencg Dept Data, Positivity Rates, Walgreens Positivity Rates)
It's a bit unclear what the *exact* trajectory is, probably somewhere in between NWSS/the rest.
It's a bit unclear what the *exact* trajectory is, probably somewhere in between NWSS/the rest.
December 20, 2024 at 8:27 PM
To note, here are some other current trends that do show a slower rise than NWSS. (WWscan, Emergencg Dept Data, Positivity Rates, Walgreens Positivity Rates)
It's a bit unclear what the *exact* trajectory is, probably somewhere in between NWSS/the rest.
It's a bit unclear what the *exact* trajectory is, probably somewhere in between NWSS/the rest.
The CDC now has a national dashboard for SARS-CoV-2 Wastewater Viral Activity. Upper Midwest is concerning. www.cdc.gov/nwss/rv/COVI... 🧪
November 28, 2023 at 11:28 PM
The CDC now has a national dashboard for SARS-CoV-2 Wastewater Viral Activity. Upper Midwest is concerning. www.cdc.gov/nwss/rv/COVI... 🧪
March 21st update:
The decline has stuttered over the past couple weeks, and NWSS also re-adjusted a couple of the past values upwards. South and Midwest both at medium levels, W/NE are low. Latest WW estimates:
🔸328,000 new infections/day
🔸~1 in 100 currently infected
The decline has stuttered over the past couple weeks, and NWSS also re-adjusted a couple of the past values upwards. South and Midwest both at medium levels, W/NE are low. Latest WW estimates:
🔸328,000 new infections/day
🔸~1 in 100 currently infected
March 22, 2025 at 1:19 AM
March 21st update:
The decline has stuttered over the past couple weeks, and NWSS also re-adjusted a couple of the past values upwards. South and Midwest both at medium levels, W/NE are low. Latest WW estimates:
🔸328,000 new infections/day
🔸~1 in 100 currently infected
The decline has stuttered over the past couple weeks, and NWSS also re-adjusted a couple of the past values upwards. South and Midwest both at medium levels, W/NE are low. Latest WW estimates:
🔸328,000 new infections/day
🔸~1 in 100 currently infected
June 13th update:
Wastewater dipped a bit this week, and NWSS corrected down last week. About tied for lowest in 3 years, though a summer wave is still anticipated.
🔸153,000 new infections/day
🔸~1 in 219 currently infected
🔸~1 in 545 are reasonably infectious
Wastewater dipped a bit this week, and NWSS corrected down last week. About tied for lowest in 3 years, though a summer wave is still anticipated.
🔸153,000 new infections/day
🔸~1 in 219 currently infected
🔸~1 in 545 are reasonably infectious
June 13, 2025 at 8:48 PM
June 13th update:
Wastewater dipped a bit this week, and NWSS corrected down last week. About tied for lowest in 3 years, though a summer wave is still anticipated.
🔸153,000 new infections/day
🔸~1 in 219 currently infected
🔸~1 in 545 are reasonably infectious
Wastewater dipped a bit this week, and NWSS corrected down last week. About tied for lowest in 3 years, though a summer wave is still anticipated.
🔸153,000 new infections/day
🔸~1 in 219 currently infected
🔸~1 in 545 are reasonably infectious
Emergency department and WWScan data showed a more significant decline and a flattening compared to NWSS data, and are more similar to my forecast. What's the true story? Maybe somewhere in between.
February 8, 2025 at 12:32 AM
Emergency department and WWScan data showed a more significant decline and a flattening compared to NWSS data, and are more similar to my forecast. What's the true story? Maybe somewhere in between.