Morlais Brook Update

July 31st, 2010

100730 - Morlais Brook Outflow

Members are aware and we are grateful for all reports on the subject that the Morlais Brook has recently been causing the members and Committee concern.

We are experiencing continual flows of dirty water and the smell of sewerage; this has been reported to the Environment Agency at least seven times in the last two weeks and we have been waiting for feedback, but we have now had a call from the Agency with the following.

On two occasions Welsh Water, the company responsible through its agents for looking after the sewerage system, were called out and found two overflowing sewerage overflows causing a problem. These were dealt with and all the other overflows checked and found to be clear. This does not mean that we will not have more discharges in future, so please keep your eyes and noses open.

The coloured water is more of a problem and after analysis the following results have come to light. The water, although dirty, does not contain any toxic substances and is not a danger to fish and river life even at the low flows we are experiencing at the moment. The way the Agency and others define this is by the ‘parts per million’ of suspended solids; in the case of the brook, this was only 60 parts per million.

To explain, the Welsh Water treatment works at Pontsticill had a discharge consent at one time for the backwash of 30 parts per million. We remember one bad discharge of 200 parts per million and no fish deaths. We are not condoning the discharge but only letting concerned members know the facts.

The discharge was not low in dissolved oxygen and the ammonia content was well within the normal limits found in any river water.

After all this the Agency are concerned and would like to know where the discharge is coming from. We understand that they think it may be coming from somewhere on the Goatmill Road and they are concentrating on looking in this area as the next step.

Any further information or concerns will be gratefully appreciated and will be passed on to the Environment Agency.

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