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Wastewater monitoring results for the current week in Louisville-Jefferson County

Wastewater Monitoring Results

Since June 2020 Louisville’s Metropolitan Sewer District (MSD) and Louisville Metro Public Health and Wellness (LMPHW) have partnered with researchers from the University of Louisville's Envirome Institute to learn how sewage may indicate community health risk. We have collected thousands of samples from sewers from across Louisville looking for SARS-CoV-2, the virus that causes COVID-19. Together with county level clinical data, our sewers are helping us to understand how infection rates are related to important clinical indicators like new hospitalizations and ICU bed capacity.

 

Comparison of Wastewater Levels and Clinical Cases, Hospital Admissions, and Occupied ICU Beds (06/20/22)

In the charts below, we compare wastewater levels to indicators of health, clinical cases of COVID-19, new hospital admissions, and occupied ICU beds. The orange, yellow, and green bars in the last two charts show CDC designated risk thresholds.

 Comparing city-wide trends in wastewater and clinical cases 06/20/22

 This graph shows the comparison between N1 levels of SARS-CoV-2 found in wastewater with positive clinical tests as reported to Louisville Metro Department of Public Health and Wellness. This week both measures are showing decreasing trends. 

 Wastewater versus Indicator: New Admissions 06/20/22

 This graph compares wastewater results to new hospital admissions for people infected with COVID-19 as reported to Louisville Metro Department of Public Health and Wellness. This week Louisville in in the green zone of low risk as assessed by the Centers for Disease Control (CDC). See the chart below for more information about the CDC's risk thresholds. 

Wastewater versus Indicator: Bed Occupancy

This chart shows a comparison between wastewater results and ICU Bed Occupancy as reported to Louisville Metro Department of Public Health and Wellness. This week Louisville in in the green zone of low risk as assessed by the Centers for Disease Control (CDC). See the chart below for more information about the CDC's risk thresholds. 


Variants of Concern

These charts show the proportion of each variant of concern for Louisville's 5 water quality treatment centers. The left side, the Y axis shows the proportion of the variant from 0.1 (10%) to 1.0 (100%). The "factor" list shows what color represents each variant.  

This week All sites detected BA.2 and no BA.1. Cedar Creek also showed Delta at around 2%. In addition, this week we tracked the BA.2.12.1 variant, which has two additional mutations not found in BA.2: L452Q and S704L. We found this variant present in all sites, ranging from 26%-86%. We are tracking BA.4 and BA.5. Preliminary analysis indicates the presence of BA.4 in Shawnee Park ; BA.5 in Floyds Fork;  BA.5 in Hites Creek; and either BA.4 or BA.5 in Morris Foreman. 

Variants of Concern

 

 

 

 

 

 

 


Louisville Sewersheds

We sample from 8 sites weekly, 5 water quality treatment plants (left panel) and 3 local sewersheds (right panel). The three graphs on this page that compare wastewater results to clinical cases, new hospitalizations for COVID-19, and ICU bed occupancy are based on all 8 sewersheds. The graphs on this page that show the variant proportions are bases on the 5 water quality treatment centers in the left panel. 

 

You can view additional wastewater data at the CDC's COVID Data Tracker.


Contact

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