[Lex Computer & Tech Group/LCTG] COVID levels in wastewater

[Alan Millner]

I  live in Lexington.
Lexington does not allow street runoff into the sanitary sewer lines. 
Most streets with curbside drains also have separated sewer lines. I would say all of them, but I have not examined all of them.
Alan Millner
amillner at alum.mit.edu
781-862-7893
48 North St., Lexington MA 02420



On Jan 15, 2023, at 5:12 PM, David Lees <joeoptics at gmail.com> wrote:

Ted,
Could you please post the plots of hospitalization rates for the mwra districts on top of The Biobot plots of covid in Deer Island data to back up your statement about "noise".  Runoff doesn't seem like it should be noise.  Further, what is the magnitude of water runoff dilution as a fraction of signal?

Thanks.

David Lees 
Tab S8+

On Sun, Jan 15, 2023, 2:45 PM Ted Kochanski <tedpkphd at gmail.com <mailto:tedpkphd at gmail.com>> wrote:
> John,
> 
> There is a big problem with this data being compared over long periods of time
> Some of the waste water includes surface run-off and some mostly doesn't
> hence, since the y axis is a concentration of virus in the water -- if the amount of "active water" from households is diluted by surface run-off because of recent rain or even more complicating melting snow mixed with recent rain -- how can you tell?
> 
> I suggest that the data suggests that last year there was a real spike and that recently there is just "noise" in the system
> 
> Ted
> 
> 
> On Fri, Jan 13, 2023 at 8:17 PM <jjrudy1 at comcast.net <mailto:jjrudy1 at comcast.net>> wrote:
>> Don’t worry about the y-axis, just the shape of the curve.  The article gave no indication as to what is “good”.  In the later graph look at the winter spikes.  The big problem was a year ago.
>> 
>>  
>> 
>> <image001.png>
>> 
>>  
>> 
>> <image002.png>
>> 
>>  
>> 
>> John Rudy
>> 
>>  
>> 
>> 781-861-0402
>> 
>> 781-718-8334  cell
>> 
>> 13 Hawthorne Lane
>> 
>> Bedford MA
>> 
>> jjrudy1 at comcast.net <mailto:jjrudy1 at comcast.net>
>> <image003.png>
>> 
>>  
>> 
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