REPORT ON DISSOLVED OXYGEN LEVELS ON MAYO RIVERS.

Named river: Glore
Tributary of: Gweestion

Stat D.o ( % Sat )

 No  Min  Med  Max
100  72  89  112


Assessment
Results indicate unpolluted waters.

Change from 1994
No significant change observed.


Named river: L. Mask
Tributary of: L. Mask

Stat D.o ( % Sat )

 No  Min  Med  Max
100  85  86  97

Assessment
Results indicate unpolluted conditions

Change from 1994
No significant change observed


Named river: Robe
Tributary of: Lough Mask

Stat D.o ( % Sat)

 No  Min  Med  Max
30  69 74  91

Assessment
Slightly elevated maximum ammonias and ortho - Phosphates at more downstream stations . One isolated elevated maximum B.O.D at station 0200. Otherwise conditions satisfactory.

Change from 1994
Additional station sampled in 1995 . No significant change in quality observed at other sampling stations.


Named River: Black (Shrule )
Tributary of: Lough Corrib

Stat D.o ( % Sat )

 No  Min  Med  Max
100  61  74  81

 

Assessment
Results indicate unpolluted conditions . Low minimum D.Os due to granddaughter source .

Change from 1994
No significant change observed.

Named River: Clydagh ( Castlebar )
Tributary of: Castlebar river

Stat D.o ( % Sat )

 No  Min  Med  Max
100  81  91  108

Assessment
Results indicate unpolluted conditions.

Change from 94
No significant change observed


 

Named River:Ballindine :
Tributary of the Robe
.

Dissolved oxygen > minimum. oxygen 84 ppm.
Assessment : Conditions satisfactory.
Change from 1994 : Improvement in quality observed.


Named River: Manulla
Tributary of Castlebar
.

Dissolved oxygen > minimum , 63 ppm.
Assessment : some isolated , slightly elevated , maximum ammonias and ortho - phosphates.Some deoxygenation also evident.Otherwise conditions satisfactory.
Change from 1994 : Some deterioration in Ballinafad bridge.


Named River: Moy.

Dissolved oxygen > minimum , 80 ppm.
Assessment : slightly elevated maximum ammonias.
Change from 1994 : No significant change observed.


Named River: Yellow river, Knock.

Dissolved oxygen >70 ppm.
Assessment : Results indicate unpolluted conditions.
Change from 1994 : Evidence of slight deterioration in quality.


Named River: Yellow river, Foxford.

Dissolved oxygen > 85 ppm.
Assessment : Results indicate unpolluted conditions.
Change from 1994 : No significant change observed.