NWSS Wastewater Monitoring in the U.S.

National Wastewater Surveillance System graphic

Wastewater (sewage) can be tested to detect traces of infectious diseases circulating in a community, even if people don’t have symptoms. You can use these data as an early warning that levels of infections may be increasing or decreasing in your community.

About CDC’s Wastewater Program (NWSS)

How Wastewater Monitoring Works

Wastewater Monitoring Data

CDC’s National Wastewater Surveillance System (NWSS) program collects and displays wastewater data from communities across the United States.

COVID-19 Influenza A RSV MPOX

Nationally, the wastewater viral activity level for COVID-19 is currently moderate.

See the data

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

* Based on a small segment (less than 5%) of the population and may not be representative of the state/territory.

Data last updated FromDB

Link to Dataset Download Data (CSV)

Data Table

Data table showing data for the United States Map figure.
State/TerritorySort by State/Territory in descending order	Viral Activity LevelSort by Viral Activity Level in descending order	Sites Currently ReportingSort by Sites Currently Reporting in descending order	Limited CoverageSort by Limited Coverage in descending order
Alabama	High	7
Alaska	Low	3
Arizona	Very Low	12
Arkansas	Moderate	8
California	Low	68
Colorado	Very Low	22
Connecticut	High	9
Delaware	Moderate	8
District Of Columbia	High	1
Florida	Low	22
Georgia	High	18
Guam	Low	3	Limited Coverage
Hawaii	Low	9
Idaho	Low	5
Illinois	Moderate	73
Indiana	High	19
Iowa	High	8
Kansas	Moderate	13
Kentucky	High	18
Louisiana	High	51
Maine	Very Low	14
Maryland	High	9
Massachusetts	Low	5
Michigan	Low	11
Minnesota	Moderate	29
Mississippi	Moderate	2	Limited Coverage
Missouri	Low	1	Limited Coverage
Montana	No Data	0
Nebraska	Moderate	15
Nevada	Low	2
New Hampshire	Low	14
New Jersey	High	22
New Mexico	Very Low	7
New York	Very Low	67
North Carolina	High	33
North Dakota	No Data	0
Ohio	Low	70
Oklahoma	High	14
Oregon	Low	26
Pennsylvania	Low	13
Rhode Island	Low	10
South Carolina	Very High	19
South Dakota	Very High	2	Limited Coverage
Tennessee	High	2
Texas	Moderate	33
Utah	Very Low	32
Vermont	Very Low	5
U.S. Virgin Islands	No Data	0
Virginia	High	6	Limited Coverage
Washington	Low	25
West Virginia	High	1
Wisconsin	Moderate	41
Wyoming	Very Low	7

See the data

Nationally, the wastewater viral activity level for influenza A is currently moderate.

See the data

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

* Based on a small segment (less than 5%) of the population and may not be representative of the state/territory.

Data last updated FromDB

Link to Dataset Download Data (CSV)

Data Table

Data table showing data for the United States Map figure.
State/TerritorySort by State/Territory in descending order	Viral Activity LevelSort by Viral Activity Level in descending order	Sites Currently ReportingSort by Sites Currently Reporting in descending order	Limited CoverageSort by Limited Coverage in descending order
Alabama	Moderate	7
Alaska	Moderate	3
Arizona	Very Low	2	Limited Coverage
Arkansas	Low	8
California	Moderate	63
Colorado	Very Low	22
Connecticut	Low	5
Delaware	Moderate	8
District Of Columbia	Moderate	1
Florida	Moderate	20
Georgia	Moderate	8
Guam	No Data	0
Hawaii	Low	9
Idaho	Moderate	5
Illinois	Moderate	73
Indiana	Moderate	19
Iowa	Moderate	8
Kansas	Moderate	13
Kentucky	Low	18
Louisiana	Moderate	27
Maine	Moderate	14
Maryland	Moderate	9
Massachusetts	Moderate	5
Michigan	High	6	Limited Coverage
Minnesota	Moderate	4
Mississippi	Moderate	2	Limited Coverage
Missouri	Low	1	Limited Coverage
Montana	No Data	0
Nebraska	Moderate	15
Nevada	Moderate	1
New Hampshire	Moderate	14
New Jersey	Moderate	22
New Mexico	Moderate	2
New York	High	1	Limited Coverage
North Carolina	Low	33
North Dakota	No Data	0
Ohio	Moderate	69
Oklahoma	Low	1	Limited Coverage
Oregon	Low	25
Pennsylvania	Low	6	Limited Coverage
Rhode Island	Moderate	8
South Carolina	Low	17
South Dakota	Moderate	2	Limited Coverage
Tennessee	Moderate	2
Texas	Low	26
Utah	High	2
Vermont	Moderate	5
U.S. Virgin Islands	No Data	0
Virginia	Moderate	6	Limited Coverage
Washington	Moderate	25
West Virginia	Very High	1
Wisconsin	Low	20
Wyoming	Low	2

See the data

Nationally, the wastewater viral activity level for RSV is currently low.

See the data

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

* Based on a small segment (less than 5%) of the population and may not be representative of the state/territory.

Data last updated FromDB

Link to Dataset Download Data (CSV)

Data Table

Data table showing data for the United States Map figure.
State/TerritorySort by State/Territory in descending order	Viral Activity LevelSort by Viral Activity Level in descending order	Sites Currently ReportingSort by Sites Currently Reporting in descending order	Limited CoverageSort by Limited Coverage in descending order
Alabama	Low	7
Alaska	Low	3
Arizona	Moderate	2	Limited Coverage
Arkansas	Very Low	8
California	Moderate	63
Colorado	Low	22
Connecticut	Very Low	5
Delaware	Very Low	8
District Of Columbia	Low	1
Florida	Low	20
Georgia	Low	8
Guam	No Data	0
Hawaii	Very Low	9
Idaho	High	5
Illinois	Low	73
Indiana	Low	19
Iowa	Moderate	7
Kansas	Moderate	13
Kentucky	Very Low	11
Louisiana	Low	7
Maine	Very Low	14
Maryland	Very Low	9
Massachusetts	Low	5
Michigan	High	6	Limited Coverage
Minnesota	High	4
Mississippi	Low	2	Limited Coverage
Missouri	Low	1	Limited Coverage
Montana	No Data	0
Nebraska	Very High	15
Nevada	Low	1
New Hampshire	Moderate	14
New Jersey	Very Low	22
New Mexico	Very High	2
New York	High	1	Limited Coverage
North Carolina	Very Low	33
North Dakota	No Data	0
Ohio	Very Low	69
Oklahoma	Very Low	14
Oregon	Very Low	25
Pennsylvania	Moderate	6	Limited Coverage
Rhode Island	Very Low	8
South Carolina	Very Low	17
South Dakota	High	2	Limited Coverage
Tennessee	Low	2
Texas	Low	26
Utah	High	2
Vermont	Very Low	5
U.S. Virgin Islands	No Data	0
Virginia	Very Low	6	Limited Coverage
Washington	Very Low	25
West Virginia	Moderate	1
Wisconsin	Low	21
Wyoming	High	2

Link to Dataset Download Data (CSV)

See the data

Wastewater detections of the virus that causes mpox in the past 4 weeks, United States

Time Period: February 16, 2025 - March 15, 2025

Persistent detection

0 sites (0%)

Detection

8 sites (2%)

No recent detection

416 sites (98%)

No recent data

29 sites

MPOX Testing Types
Overall Testing for Mpox	Test Type: Non-Clade Specific	Test Type: Clade Specific
Total wastewater sites testing for mpox: 453 sites	269 sites	Clade I: 330 sites	Clade II: 207 sites

See mpox results by test type

Wastewater Monitoring Data

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

Time Period: March 09, 2025 - March 15, 2025

U.S. Territories

Time Period: February 16, 2025 - March 15, 2025

Wastewater Data

Wastewater Resources