Dissolved Oxygen
Location	2017	2018
1a	5	7.2
1b	4.6	7.8
1c	6.8	9.8
1d	5.8	6.8
2a	5	7
2b	5.8	6.6
2c	4	8.5
2d	6	6.8
3a	4.6	6.8
3b	5.6	8
3c	4	6.2
3d	7	7
4a	4.6	8
4b	5.6	7.6
4c	5.6	9.25
4d	25	6.9