2022-12-15 Ordinary Meeting Minutes

ORDINARY MEETING MINUTES   15 DECEMBER 2022




                               Page 25 of 25

ORDINARY MEETING MINUTES                                                                        15 DECEMBER 2022

               9.2.2 Middle Estuary

                  F                 Cranks Ck, Hooper Cres, before Lake Doonella CRA900
                                    (77 samples, 12 new)
                 Waterwatch
                  Grade
                        Turbidity (17NTU) + iz

                           ter (233c)
                              PH (7.18) + =
                            DO (63%sat) mz
                                       0                     50                      100
                                               Compliance (%of samples)
                   e   Middle Estuary water type used;
                   e   Monitoring commenced in 2010, good sample size;
                   e   Turbidity compliance has improved since 2017, however the median value is relatively high
                       (turbidity has spiked at 200 NTU);
                   e   Dissolved oxygen has low compliance with a median value of 63% saturation, no records
                       above 90% saturation in recent years;
                   e   pH compliance has improved but is still relatively poor, with the range from 5.6 to 8.6.

               9.2.3 Lower Noosa River Estuary

                                        Noosa Waters entrance                  NOO780
                                        (111 samples, 7 new)
                 Waterwatch
                  Grade
                         Turbidity (GBNTU) ZZ

                           ter (237)

                               1.00

                            co co%sat

                                       oO                      50                     100
                                               Compliance (%of samples)
                   e   Lower Estuary water type used;
                   e   Monitoring commenced in 2005, good sample size;
                   e   Turbidity guidelines for the lower estuary are very low (0-4 NTU), consequently turbidity
                       levels do not have to be excessive to be non-compliant. Turbidity has peaked at 30 NTU,
                       which is relatively low;
                   e   Dissolved oxygen has a median value of 90% saturation, with a wide % saturation (53 —
                       123%) variation which may indicate a water quality issue;
                   e   pH values recorded range from 5.4 to 9.0 which could indicate a water quality issue.

                                                                                                    38| Page

                                                                                                       Page 25 of 25