Yggsburgh Sewers & Drinking Water

Sewers
Yggsburgh's sewers are for the most part less than a century old, dating from the city's golden age under the Lord Yggs, Lewis Garamonde.
All pipes are circular, the floor curving up into walls and meeting the lead or ceramic inflow pipes above. Except in heavy rainfall there is often space to walk either side of the flow. Main sewer pipes are 10' wide and follow the main thoroughfares, sloping down from south to north, with narrow intake pipes in the Nemo, and broader outflows emptying into the Urt river both upstream and downstream of the River Gate, in the less salubrious part of town. Narrow feeder tunnels about 6' wide flow run from east and west; some of these are dry and used only for access. The system also acts as storm drains to prevent flooding.
Rumour has it that the sewers connect to various 'dungeons' below Yggsburgh, such as the tunnels of the Thieves' Guild, a network of abandoned chambers, laboratories and dungeons said to lie beneath the Academy of Magic, and other remnants of Yggsburgh's early history - slave pits from the days when it was part of the Margravy of Talworth, and even blood-stained altars and tombs from its earliest days as a town or fortress of the grim and savage Cnobrii.

Water
In-flows from the Nemo on the south side of town provide ground-level water throughout the town, which can be pumped up by hand from local pumps, both public and private.  Drinking this is not advised, due to effluent from the Outs, and this water is a frequent source of disease. Water carriers collect clean water from the upper banks of the Urt and Nemo beyond Yggsburgh, for sale as potable. The waters of the upper Nemo in particular run for miles across gravel beds which act as an excellent filter. Still, sensible folk stick to beer.
There is a good spring beneath the Yggsburgh gardens, which provides excellent water to the west side of town, especially the nobles' residences and the College. A pumping station manned by prisoners subject to penal servitude draws this water up to into a great storage tank, with enough pressure that the West End enjoys a plentiful supply of clean running water without need for hand pumps.