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

[Frank Sandy]

     The sewer system and the storm water drainage system are completely 
separate in Lexington.   Older systems in some other communities are 
still partially combined.  However, even in Lexington, there are some 
people that illegally connect their sump pumps to their toilets and the 
Town's sewer system.

Frank Sandy

On 1/15/2023 8:44 PM, Bill Haley wrote:
> As far as I know the storm water run off system is not connected to 
> the waste water treatment system.
>
> Bill
>
> On Sun, Jan 15, 2023 at 11:44 AM Ted Kochanski <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> 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.
>
>         John Rudy
>
>         781-861-0402
>
>         781-718-8334 cell
>
>         13 Hawthorne Lane
>         <https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g>
>
>         Bedford MA
>         <https://www.google.com/maps/search/13+Hawthorne+Lane+Bedford+MA?entry=gmail&source=g>
>
>         jjrudy1 at comcast.net
>
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