2016-02-02 P&O Committee - Item 3 - Attachment 4 - Mary River Environmental Values and Water Quality Objectives

            Mary River environmental values and water quality objectives




            Table 12 Drinking water EV: Priority water quality objectives for drinking water supply in the vicinity
            of off-takes, including groundwater, before treatment

                        Indicator                             Hazard and critical control point (HACCP) rating
                                                             (refer notes 1, 2 for explanation of HACCP levels)
                                                                      1
              Suspended solids                  •    Level 1: 25 mg/L
                                                                        2
                                                •    Level 2: 100 mg/L
              Blue-green algae                  •    2,000 cells/mL
              (cyanobacteria)
                                                                                                                  1
              Algal biomass                     •    Level 1: > 30,000 cells/mL Cylindrospermopsin or Microcystin
                                                                 2
                                                •    No Level 2
                                                                                                                   1
              Algal toxin                       •    Level 1: 0.1 µg/L Microcystin or 0.2 µg/L Cylindrospermopsin
                                                                                                               2
                                                •    Level 2: 4 µg/L Microcystin or 1 µg/L Cylindrospermopsin
              Taste and odour                   •    Level 1: 5 µg/L Geosmin or 10 µg/L MIB or 10 µg/L combined Geosmin
                                                            1
                                                     & MIB
                                                                                                           2
                                                •    Level 2: > 30 µg/L of both Geosmin & MIB combined
                                                                        1
              Cryptosporidium                   •    Level 1: > 0 cyst
                                                                                  2
                                                •    Level 2: 10 cysts per 10 L
                                                                        1
              Giardia                           •    Level 1: > 0 cyst
                                                                                  2
                                                •    Level 2: 10 cysts per 10 L
                                                                                1
              E coli                            •    Level 1: > 60 cfu/100mL
                                                                 2
                                                •    No Level 2
                                                                                  1
              Total coliforms                   •    Level 1: > 800 cfu/100mL
                                                                 2
                                                •    No Level 2
                                                                       1
              Manganese (soluble)               •    Level 1: 50 µg/L
                                                                          2
                                                •    Level 2: 200 µg/L
                                                                       1
              Iron (soluble)                    •    Level 1: 50 µg/L
                                                                          2
                                                •    Level 2: 200 µg/L
                                                                       1
              Turbidity                         •    Level 1: 25 NTU
                                                                          2
                                                •    Level 2: 100 NTU
                                                                               1
              Colour                            •    Level 1: 50 Hazen Units
                                                                 2
                                                •    No Level 2
                                                                                                        1
              Conductivity                      •    Level 1: > 50% change from long term median
                                                                                                                     2
                                                •    Level 2 same as Level 1 (no treatment options to remove salt)
                                                                                     1
              Dissolved oxygen                  •    Level 1: < 4 mg/L at surface
                                                                 2
                                                •    No Level 2
              Pesticides                        •    Level 1: Above detection limits specified by Qld Health Scientific
                                                               1
                                                     Services
                                                                                                        2
                                                •    Level 2: Notification of spills or illegal dumping
                                                                 1
              Hydrocarbons                      •    No Level 1
                                                                                                        2
                                                •    Level 2: Notification of spills or illegal dumping
            Source: Environmental Values and Water Quality Objectives for Wivenhoe, Somerset and North Pine Dam, SEQ Water,
            2005.

            Notes:
                1. “Level 1” means Level 1 Hazard and Critical Control Point (HACCP) response rating, namely – Treatment plant
                   process change required to ensure water quality and quantity to customers is not compromised.
                2. “Level 2” means Level 2 Hazard and Critical Control Point (HACCP) response rating, namely –Treatment plant
                   process change required but water quality and quantity to customers may still be compromised.




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Document Set ID: 20002123
Version: 1, Version Date: 21/12/2015