Doc wrote:

Mystery stench hits Cardiff Bay Oct 12 2005 South Wales Echo


A MYSTERY stench in Cardiff Bay has become so bad that people have
been retching in the street.

Businesses in the area say the stink, which smells like sewerage,
has been around for weeks but yesterday it was so bad people felt
physically sick.

Caroline Maiorano, the landlady of The Packet pub, said: "It is
really affecting my business. It stinks.>> "I have complained four or
five times but nothing has ever been done about it. The smell comes and
goes but it is here more often than not.">> Cardiff businessman David
Jones, 47, of Church Road, Whitchurch, who was visiting the Bay, said:
"I've never smelt anything like it. People were literally holding their
noses - it was a vile smell of raw sewage and so bad that it stayed in
my car for miles after I drove away from Mermaid Quay.">> And Yvonne
Scott, deputy headteacher at Mount Stuart Primary in Cardiff Bay said:
"It seems to be coming up from the drains.">> Welsh Water has promised
to investigate, and a spokeswoman said: "We have not received any
complaints from customers experiencing odours in the Mermaid Quay area
of Cardiff Bay but have now have dispatched a team to the area to
investigate these reports">> An environmental health spokeswoman for
Cardiff Council said their pollution control section had not had any
reports of a problem and it was Welsh Water's responsibility if the
smell was linked to the drains.
http://icwales.icnetwork.co.uk/capitalcity/news/tm_objectid=16240065&method=full&siteid=50082&headline=mystery-stench-hits-cardiff-bay-name_page.html
OK, did Nosty have any quatrains about bad odors in the air towards the
end of western civilization?? Or stinky fogs?

Doc>>

Yes, drains will smell horrible if you get backpressure to break the
siphons that keep the smell out. (You usually have liquid in the
crooked area to block reverse airflow, because of the smell).

Woods