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

[Ted Kochanski]

Michael,

On my street in Lexington -- there is one and one only sewer main it
connects to houses as well as to the drains on the edges of the street
Separation of sewer lines doesn't happen in most places

Ted

On Sun, Jan 15, 2023 at 3:03 PM Michael Alexander <mna.ma at yahoo.com> wrote:

> I’d assume that “waste water” is water in/from *sanitary sewers* – hence,
> not mixed with *storm sewer* water (no longer, at least).
>
>     – Mike Alexander
>
>
>
> On Sunday, January 15, 2023, 2:44 PM, 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
>
> Bedford MA
>
> jjrudy1 at comcast.net
>
>
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