4 ms·
SF has a combined sewer system, but it has zero farms. One question is whether it was more likely to be a signal from wild birds (into the runoff system) than h
by worstspotgain 2y ago
SF has a combined sewer system, but it has zero farms. One question is whether it was more likely to be a signal from wild birds (into the runoff system) than humans (into the sewer.)
There's very little rain in the summer months, the average for July rounds off to 0.0in. I don't remember if there was any significant rain in May or June, but I'd be surprised if it was more than 1-5% of the total. I guess there's lawn irrigation, though.
- dredmorbius 2y agoSF has pretty limited lawn irrigation as well. Depending on how the sewerage system is divided, some parts of the city have effectively none.
- worstspotgain 2y agoThere are three sewersheds [1] but we don't know which one the signal was detected in (or do we?) If it was the Northpoint one (~ NE quadrant) there aren't as many lawns there. There are a few small parks, street cleaning and whatnot. [1] https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/COVID-19/CalSuWers-Dashboard.aspx https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/COVID-19/Cal...