Here's a really cool map showing sewer outfalls and their drainage areas in New York City. Did you know that 70% of New York City has a "combined sewer system", an old type of sewer system where stormwater from roofs and streets runs in the same pipes as the sewage. Such systems are designed to overflow during heavy rainfall, which means that instead of the sewage/stormwater mix going to the treatment plants, a percentage of it goes straight into the waterways, through outfalls such as those shown in the map.
https://openseweratlas.tumblr.com/wetweathermap
https://en.wikipedia.org/wiki/Combined_sewer

>Most of the fatberg discovered in Whitechapel in London in 2017, weighing 130 tonnes (130,000 kg; 140 short tons) and stretching more than 250 metres (820 ft), was converted into biodiesel.
https://en.wikipedia.org/wiki/Fatberg

>But building separate sewers in New York would be prohibitively expensive. Instead the city is constructing huge underground reservoirs where the overflow can be held until water levels subside and the waste can be safely pumped into the treatment plants without spilling.
https://www.gothamgazette.com/environment/2005-the-sewer-system

video about CSO tank (combined sewer overflow)
https://youtu.be/RMhGtxJGhuI?t=179

>NYC ‘poop train’ returning to stench-scarred Alabama town
https://nypost.com/2022/02/11/nyc-poop-train-returning-to-stench-scarred-alabama-town/

some guys filming a combined sewer overflow in Gowanus Canal, Brooklyn
https://youtu.be/HzWOOqPAEgs

>NYC has a plan to clean its sewage-filled waterways. Does it go far enough?
https://ny.curbed.com/2020/2/20/21144943/new-york-water-combined-sewer-overflow-dep-plan

>In Albany NY a building constructed in 1913 failed to properly connect its sewage line. For 106 years it dumped 6,000 gallons of sewage water into the Hudson River everyday
https://spectrumlocalnews.com/nys/capital-region/news/2019/01/30/historical-albany-building-leaking-sewage-into-hudson-river-