I'm on a course at the moment http://onixea.com.br/lexafem-in-canada-nywp lexafem in canada
  Their solution was a 1,000-mile network of underground sewers, the construction of which caused much controversy thanks to the ﾃつ｣4.2m cost (the equivalent of ﾃつ｣430m today), but prevented sewage being dumped in the river.